Abstract

A quasi-optical beamformer includes a plurality N> 1 of power feeds (PF), each of the i∈[1; N] power feeds (PF) being configured to emit a respective radio-frequency beam denoted Ri, a radio-frequency transmission line (LT) fed at a first end by the power feeds and comprising at a second end a plurality of network ports (PR) that are configured to collect radio-frequency radiation, the transmission line (LT) comprising a radio-frequency waveguide (GO) that comprises at least two metal plates (PM) that are stacked so as to guide the radio-frequency beams Ri, i∈[1; N] towards the network ports (PR), the transmission line (LT) extending along a central main axis denoted axis x, a first reflector (M1) having a first centre (C1) centred on the axis x and a first effective radius of curvature and being configured to reflect the guided radio-frequency beams Ri, i∈[1; N], a second reflector (M2) having a second effective radius of curvature and being configured to reflect the radio-frequency beams (RFi) reflected by the first reflector so as to direct them towards the network ports so as to form output radio-frequency beams (RSi), the first and second effective radii of curvature and an arrangement of the power feeds (PF) with respect to the first reflector being configured so that: each of the output radio-frequency beams (RSi) is a plane wave, and a transverse amplitude distribution Ai, on the network ports (PR), of each output radio-frequency beam (RSi), is substantially identical.

IPC Classes  ?

• H01Q 19/06 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens
• H01Q 9/04 - Resonant antennas
• H01Q 23/00 - Antennas with active circuits or circuit elements integrated within them or attached to them
• H04B 7/06 - Diversity systems; Multi-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station

Abstract

The invention relates to a substrate coated with a coating consisting of molybdenum (Mo), sulfur (S), tantalum (Ta) and oxygen (O) atoms present in the form of one or several compound(s) selected from among the compounds of formula (I): The invention relates to a substrate coated with a coating consisting of molybdenum (Mo), sulfur (S), tantalum (Ta) and oxygen (O) atoms present in the form of one or several compound(s) selected from among the compounds of formula (I): MowSxTayOz  (I) wherein w is equal to 0 or 1; x varies from 0 to 2; y varies from 0 to 1 and z varies from 0 to 3; said coating comprising at least 5% at of oxygen and said coating having a dense compact microstructure.

IPC Classes  ?

• C10M 103/06 - Metal compounds
• C01G 39/00 - Compounds of molybdenum
• C23C 14/06 - Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
• C23C 14/35 - Sputtering by application of a magnetic field, e.g. magnetron sputtering

Abstract

A spacecraft for the distribution of electrical energy to client craft at points situated in free space, in orbit and/or on a celestial body includes a main structure equipped with an electric thruster, with a chemical thruster and with a solar generator, a first fuel container for fuel intended for the electric thruster, and a second fuel container for fuel intended for the chemical thruster. The spacecraft is able to be modulated such that the main structure can be coupled/decoupled alternatively to/from the first container or the second container, the first container and the second container are able to be coupled/decoupled to/from one another, and the solar generator can be deployed or retracted.

IPC Classes  ?

• B64G 1/42 - Arrangements or adaptations of power supply systems
• B64G 1/10 - Artificial satellites; Systems of such satellites; Interplanetary vehicles
• B64G 1/40 - Arrangements or adaptations of propulsion systems
• B64G 1/62 - Systems for re-entry into the earth's atmosphere; Retarding or landing devices
• B64G 1/64 - Systems for coupling or separating cosmonautic vehicles or parts thereof, e.g. docking arrangements

Abstract

A computer-implemented method for automatically determining a target architecture from a set of target architectures in order to implement an algorithm. The method includes selecting a language associated with a compiler of the language to produce a source code for the algorithm, the compiler including at least one compilation optimization option. Compiling source code for the algorithm according to at least one compilation optimization option to produce an object code. The method includes measuring at least one performance score of the produced object code, the at least one performance score being measured according to a metric.

IPC Classes  ?

• G06F 8/41 - Compilation

Abstract

The present description concerns a support (108) for an electronic die (110), comprising: a first printed circuit board (300); a first conductive region (310), intended to receive the die, located on a first surface (108i) of the first board; and a second conductive region (320), intended to receive a thermal connector (200), located on a second surface (108s) of the first board, opposite to the first surface, the first region being connected to the second region by at least one through conductive via (330), located vertically in line with the first region.

IPC Classes  ?

• H05K 1/02 - Printed circuits - Details
• H01L 23/00 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details of semiconductor or other solid state devices
• H05K 1/14 - Structural association of two or more printed circuits

Abstract

A radiofrequency antenna is adapted to be mounted on a spacecraft. The radiofrequency antenna includes four helical strands of a super elastic shape memory alloy and is configured to move from a deployed configuration to a constrained stacking configuration and to return autonomously to the deployed configuration.

IPC Classes  ?

• H01Q 11/08 - Helical antennas
• H01Q 1/36 - Structural form of radiating elements, e.g. cone, spiral, umbrella
• H01Q 1/28 - Adaptation for use in or on aircraft, missiles, satellites, or balloons

Abstract

The invention relates to a method for assembling a first metal part with a second part made of an organic matrix composite material, the first part having a first connecting portion and the second part having a second connecting portion, the method comprising the steps of: causing the first connecting portion and the second connecting portion to overlap, a through-hole of the second connecting portion opening onto the first connecting portion, forming a protective layer on the side wall of the through-hole, forming a seal between the protective layer and the first connecting portion, and forming, by additive manufacturing using cold gas spray deposition of metal powder, a fastening element which extends into the through-hole, is fastened to the first connecting portion and encloses the second connecting portion.

IPC Classes  ?

• B29C 65/00 - Joining of preformed parts; Apparatus therefor
• B29C 65/56 - Joining of preformed parts; Apparatus therefor using mechanical means
• B22F 5/00 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
• B22F 10/25 - Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
• F02K 9/34 - Casings; Combustion chambers; Liners thereof

Abstract

The present disclosure concerns a device for deploying a nanosatellite including a main structure mounted on a launching vehicle, a support frame carrying the nanosatellite, and a locking/unlocking structure. The locking/unlocking structure includes a first clamping element complementary to a second clamping element of the support frame, and an elastically deformable actuating element to allow, in a locking position, constrain the first clamping element to the second clamping element to retain the support frame to the main structure, and in an unlocking position, release the first clamping element from the second clamping element to release the support frame from the main structure causing it to be ejected.

IPC Classes  ?

• B64G 1/64 - Systems for coupling or separating cosmonautic vehicles or parts thereof, e.g. docking arrangements

Abstract

The present invention concerns the field of microreaction devices and of micro-process engineering. It particularly involves devices having micro-channels (internal chambers of micrometric to submicrometric dimensions) for conveying chemical or biochemical mixtures and/or reactions. More specifically, such devices are optimized to achieve high temperature and pressure stresses (i.e. 500° C. and 500 bar). For observation and analysis purposes, the microreaction devices have a wide range of transparency in terms of wavelengths. The subject matter of the present invention relates to a microfluid or microreactor device made of transparent sapphire, preferably in the wavelength range of 150 to 6500 nm, its manufacturing method and to its use.

IPC Classes  ?

• B01J 19/00 - Chemical, physical or physico-chemical processes in general; Their relevant apparatus

Abstract

A method for constructing a high-resolution merged signal from low-resolution signals acquired by an acquisition device includes acquisition of low-resolution signals (BR), measurement and/or estimation of acquisition parameters, pre-merging of the signals as a function of the low-resolution signals and of the parameters, filtering of the pre-merged signal, transmission of the filtered pre-merged signal and of the parameters, calculation of an estimate of the pre-merged signal by an inverse filtering of the filtered pre-merged signal, and determination, according to a variational method, of the high-resolution merged signal from the estimate of the pre-merged signal and of the parameters, a resolution of the merged signal is greater than a resolution of each signal.

IPC Classes  ?

• H04N 23/80 - Camera processing pipelines; Components thereof
• H04N 7/18 - Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
• H04N 5/265 - Mixing

Abstract

A process for manufacturing a multi-material part by additive manufacturing, includes the following steps: a) a step of providing a pre-treated metal powder comprising grains and an oxidized and porous layer on a surface of the grains; b) a selective laser powder-bed fusion step comprising implementation of steps i) and ii) as follows: i) a step of forming a layer from the pre-treated metal powder; ii) a step of melting by laser the layer, the melting step being carried out under a reactive atmosphere and comprising changing parameters of application of the laser so that at least a first region of the layer is converted so as to lower the electrical conductivity thereof, thus forming a dielectric, and so that at least a second region of the layer is densified without converting it, the at least a first region being formed when the parameters of application of the laser allow a first energy density to be applied to the first region and/or the laser beam to be kept for a first dwell time on the first region, the at least a second region being formed when the parameters of application of the laser allow a second energy density to be applied to the second region and/or the laser beam to be kept for a second dwell time on the second region, and the first energy density being higher than the second energy density and/or the first dwell time being longer than the second dwell time. A part obtained using the process is also provided.

IPC Classes  ?

• B22F 12/40 - Radiation means
• B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
• B22F 1/145 - Chemical treatment, e.g. passivation or decarburisation
• B22F 1/16 - Metallic particles coated with a non-metal
• C22C 1/10 - Alloys containing non-metals
• B33Y 10/00 - Processes of additive manufacturing
• B33Y 70/10 - Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
• B33Y 40/10 - Pre-treatment

Abstract

An ion propulsion device including emission modules in an emission plane, each module having an insulating support, an emission electrode on the support, and a conductive liquid with a microfluidic channel depositing conductive liquid on the electrode; an extraction electrode common to the emission modules and facing the modules; and a control unit, in which each module is configured to emit an ion beam when an electric field is applied to the liquid; each control unit controls an ion emission current emitted by applying a potential difference between each emission electrode and the extraction electrode; the emission electrodes are spaced apart by a linear distance that is greater than a distance between two adjacent emission electrodes separated by an empty space; and a length of the insulating support between the electrodes is greater than a propagation distance of an electric leakage current by charge jumping along the support between the electrodes.

IPC Classes  ?

• B64G 1/40 - Arrangements or adaptations of propulsion systems
• H01J 27/26 - Ion sources; Ion guns using surface ionisation, e.g. field effect ion sources, thermionic ion sources

Abstract

The present disclosure relates to a method and a device for measuring at least one atmospheric parameter (gas, temperature). The method includes implementing steps of acquiring spectral images in the ultraviolet and/or the visible and/or the infrared range and scanning according to a tomographic principle. The spectral images are acquired using a network of optical systems such as infrared cameras, and are used to estimate the air quality and/or meteorological and/or climate parameters in a geographic area, for example an urban agglomeration.

IPC Classes  ?

• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups
• G01N 15/06 - Investigating concentration of particle suspensions
• G01N 21/31 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
• G01W 1/06 - Instruments for indicating weather conditions by measuring two or more variables, e.g. humidity, pressure, temperature, cloud cover or wind speed giving a combined indication of weather conditions
• G01N 21/17 - Systems in which incident light is modified in accordance with the properties of the material investigated

Abstract

Method for processing a sequence of digital signal samples including a first sub-sequence and a second sub-sequence. Forming a first block of samples comprising the first sub-sequence and a second block of samples comprising header samples followed by the second sub-sequence. Demodulating the first block of samples through a digital demodulator to produce a first block of symbols, and the second block of digital signal samples through a second digital demodulator to produce a second block of symbols. The second demodulator implementing a carrier synchronisation or symbol rate synchronisation starting with the header samples, which comprise samples in a number adapted in such a way that the synchronisation is effective before the second demodulator demodulates the second sub-sequence. Reconstructing a sequence of symbols by concatenating the first symbol block with the second symbol block.

IPC Classes  ?

• H04L 27/233 - Demodulator circuits; Receiver circuits using non-coherent demodulation
• H04B 1/00 - TRANSMISSION - Details of transmission systems not characterised by the medium used for transmission
• H04L 7/06 - Speed or phase control by synchronisation signals the synchronisation signals differing from the information signals in amplitude, polarity, or frequency
• H04B 1/30 - Circuits for homodyne or synchrodyne receivers

Abstract

A tunable microwave system includes at least two elements, each element being chosen from a propagating guide, an evanescent guide, a resonator, and at least one coupling device arranged between the two elements and configured to couple the two elements to each other, the coupling device having a holder having an aperture and having at least one elongate element the shape of which is elongate in a polarization direction contained in a plane of the aperture, the elongate element being securely fastened to the perimeter of the aperture at at least one end, the coupling device being configured to be rotatable about an axis substantially perpendicular to the plane of the aperture so as to modify a value of the polarization direction and so that the coupling between the two elements is dependent on the value of the polarization direction.

IPC Classes  ?

• H01P 1/165 - Auxiliary devices for rotating the plane of polarisation
• H01P 1/17 - Auxiliary devices for rotating the plane of polarisation for producing a continuously rotating polarisation, e.g. circular polarisation
• H01P 1/06 - Movable joints, e.g. rotating joints
• H01P 1/211 - Waffle-iron filters; Corrugated structures
• H01P 1/219 - Evanescent mode filters
• H01P 1/12 - Auxiliary devices for switching or interrupting by mechanical chopper

Abstract

This microwave component (10) comprises a waveguide (12) comprising an upper layer, a lower layer, and a central layer (18) intermediate between the upper layer and the lower layer, said layers defining a zone (19) of propagation of an electromagnetic wave, the propagation zone (19) extending along a propagation axis, and comprising a cavity (32) bounded by the upper layer, the lower layer, and, laterally, by two opposite lateral edges (36) of the central layer (18). The waveguide (12) comprises at least one dielectric strip (28) placed in the propagation zone (19), the dielectric strip (28) being defined in one of the upper layer and the lower layer or being placed in the cavity (32) away from the lateral edges (36) of the cavity (32).

IPC Classes  ?

• H01P 3/12 - Hollow waveguides
• H01P 11/00 - Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type

Abstract

A Global Navigation Satellite System (GNSS) positioning techniques is provided. A method to improve the time required to compute a position measurement in a GNSS receiver, and the time required to make this position measurement accurate is also provided. The method comprises computing a snapshot PVT (Position Velocity and Time) measurement, and use it to reduce the time required to acquire new signals to compute a conventional PVT measurement. A receiver implementing the method is further provided.

IPC Classes  ?

• G01S 19/24 - Acquisition or tracking of signals transmitted by the system
• G01S 19/25 - Acquisition or tracking of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS

Abstract

A new unequal-error-protection method that is based on using a particular parity-check-matrix structure for LDPC codes.

IPC Classes  ?

• G06F 11/00 - Error detection; Error correction; Monitoring
• G08C 25/00 - Arrangements for preventing or correcting errors; Monitoring arrangements
• G06F 11/30 - Monitoring
• H03M 13/00 - Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
• H04L 1/00 - Arrangements for detecting or preventing errors in the information received
• H03M 13/11 - Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits using multiple parity bits
• H03M 13/29 - Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes
• H03M 13/35 - Unequal or adaptive error protection, e.g. by providing a different level of protection according to significance of source information or by adapting the coding according to the change of transmission channel characteristics

Abstract

A user computing device, method and computer program to display a view to the user are provided. The invention allows a user to display a number of different views with photorealistic rendering of how the view should look like at a view time, based solely on view position, and descriptors of the view. In an aspect, the invention deduces from view position and view time the view descriptors (weather parameters, traffic parameters . . . ); selects, in a collection of images, an image of the view based on view position; modifies the image to match descriptors of the view (for example, by adding a rain effect if the image in the collection is under sunshine and the view should be displayed under rain). Thus, the invention allows displaying photorealistic images of how a view should look like at any time.

IPC Classes  ?

• G01C 21/36 - Input/output arrangements for on-board computers
• G06F 16/29 - Geographical information databases

Abstract

An antenna assembly configured to transmit terrestrial positioning signals from a relay platform having a frame of reference, the transmit being in at least a first mode with a radiating pattern having at least a main lobe having a narrow aperture in a plane and a wide aperture in a plane. A relay platform comprising a receiver of a synchronization signal, a transmitter of positioning signals to an area of service comprising a number of rovers, and an antenna assembly configured to produce a radiating pattern adapted to transmit the positioning signals as a function of the environment of the relay platform and the rovers. In a number of embodiments the relay platforms may be organized in a network of platforms, possibly of masters and slaves that receive feed-back from the rovers in the AoS so as to optimize the configuration of the antenna elements dynamically to optimize the QoS of positioning based on a number of selected quality indexes.

IPC Classes  ?

• H01Q 3/34 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means
• G01S 19/11 - Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing dedicated supplementary positioning signals wherein the cooperating elements are pseudolites or satellite radio beacon positioning system signal repeaters
• G01S 1/04 - Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves - Details
• H01Q 21/08 - Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along, or adjacent to, a rectilinear path
• H01Q 25/04 - Multimode antennas

Abstract

An add-on device configured to reduce the power level of reflected paths of GNSS signals reaching a GNSS receiver's antenna, the associated GNSS receiver set, some equipment embedding the add-on device, and the associated method to reduce the power level of reflected GNSS signals are provided. The GNSS signals are transmitted according to a first polarization, and the add-on device comprises a material configured to be transparent to the first polarization and to reflect GNSS signals polarized according to a second polarization orthogonal to the first polarization.

IPC Classes  ?

• G01S 19/22 - Multipath-related issues
• G01S 19/36 - Constructional details or hardware or software details of the signal processing chain relating to the receiver frond end

Abstract

k).

IPC Classes  ?

• H01P 3/123 - Hollow waveguides with a complex or stepped cross-section, e.g. ridged or grooved waveguides
• H01P 1/06 - Movable joints, e.g. rotating joints
• H01P 1/18 - Phase-shifters
• H01P 5/18 - Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
• H01Q 13/06 - Waveguide mouths
• H01Q 21/06 - Arrays of individually energised antenna units similarly polarised and spaced apart

Abstract

The invention discloses a receiver and a method to process navigation signals from one or more GNSS constellation, wherein an observation model and a measurement model allow a direct calculation of the carrier phase ambiguities. More specifically, in a triple frequency implementation, the receiver calculates in turn the extrawidelane, widelane and narrowlane ambiguities. The code and carrier phase biases can also be directly calculated. Thanks to the invention a quicker acquisition and tracking of a precise position, which will also be less noisy than a prior art solution, especially in some embodiments of the invention using a RAIM and/or a gap-bridging function. Also, code smoothing using the Doppler and low latency clock synchronization allow to decrease the noise levels of the precise point navigation solutions.

IPC Classes  ?

• G01S 19/44 - Carrier phase ambiguity resolution; Floating ambiguity; LAMBDA [Least-squares AMBiguity Decorrelation Adjustment] method
• G01S 19/02 - Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO - Details of the space or ground control segments
• G01S 19/25 - Acquisition or tracking of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS
• G01S 19/29 - Acquisition or tracking of signals transmitted by the system carrier related
• G01S 19/32 - Multimode operation in a single same satellite system, e.g. GPS L1/L2

Abstract

A device for handling multipath of a G.N.S.S. signal, is configured to: determine a spatial position, a clock time and measured multipath parameters comprising a relative delay and relative amplitude; communicate to a remote server the spatial position, clock time and multipath parameters; and receive processed multipath parameters as determined by the remote server. Systems comprising a plurality of such devices and their variants are described. Further aspects are described, in particular the exclusion of one or more satellites, the use of threshold schemes, pull/push modes, configurable refresh rates, quantization of positions, activation of additional sensors, filtering options, determination of merit factors for example as a function of the number of satellites in view and/or of signal-to-noise ratio, peer-to-peer schemes, as well as graphical display, audible sound or haptic feedbacks.

IPC Classes  ?

• G01S 19/22 - Multipath-related issues
• G01S 19/11 - Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing dedicated supplementary positioning signals wherein the cooperating elements are pseudolites or satellite radio beacon positioning system signal repeaters
• G01S 19/34 - Power consumption
• G01S 19/36 - Constructional details or hardware or software details of the signal processing chain relating to the receiver frond end

Abstract

x′ relative to the new passenger.

IPC Classes  ?

• B64G 1/38 - Guiding or controlling apparatus, e.g. for attitude control damping of oscillations, e.g. nutation dampers
• B64G 1/60 - Crew or passenger accommodations
• B64G 1/64 - Systems for coupling or separating cosmonautic vehicles or parts thereof, e.g. docking arrangements
• G06F 17/16 - Matrix or vector computation

Abstract

A LIDAR-type device for a remote spectroscopy of a matter includes an optical emission channel that includes a laser source and an optical waves frequency generator to generate a first comb, a second comb, and a local comb. Each comb includes at least one stripe. A transmit telescope emits an emission signal. A reception channel includes a receive telescope that receives a signal reflected by the matter traversed by the emission signal and a detection system that detects a first beat signal of the at least one stripe of the local comb with the corresponding first stripe of the first reflected comb, a second beat signal of the at least one stripe of the local comb with the corresponding second stripe of the second reflected comb, and a third beat signal of the at least one first beat signal with the at least one second beat signal.

IPC Classes  ?

• G01S 17/34 - Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
• G01J 3/02 - Spectrometry; Spectrophotometry; Monochromators; Measuring colours - Details
• G02B 23/24 - Instruments for viewing the inside of hollow bodies, e.g. fibrescopes

Abstract

The invention concerns a method and a device for digital image restoration. The digital image to be restored comes from an initial image acquired by an image acquisition device having an associated acquisition instrumental noise. The method comprises the following steps: —obtaining (30) an intermediate digital image with restoration of the acquisition instrumental noise, —denoising (32) the intermediate digital image in order to obtain a denoised intermediate digital image, —deconvolution (34) of the denoised digital image in order to obtain a restored digital image.

IPC Classes  ?

• G06T 5/00 - Image enhancement or restoration
• G06T 5/10 - Image enhancement or restoration by non-spatial domain filtering
• G06T 5/50 - Image enhancement or restoration by the use of more than one image, e.g. averaging, subtraction
• G06T 9/00 - Image coding

Abstract

2 vanadium oxide, and crystallized in a monoclinic or rutile phase, with a thickness between 30 and 50 nm; and g) a solar-protective coating, transparent to infrared radiation.

IPC Classes  ?

• B32B 15/04 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance
• B32B 17/06 - Layered products essentially comprising sheet glass, or fibres of glass, slag or the like comprising glass as the main or only constituent of a layer, next to another layer of a specific substance
• G02B 5/08 - Mirrors
• B64G 1/22 - Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
• C03C 17/36 - Surface treatment of glass, e.g. of devitrified glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
• B64G 1/58 - Thermal protection, e.g. heat shields
• C09K 9/00 - Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some form of energy
• G02B 7/00 - Mountings, adjusting means, or light-tight connections, for optical elements

Abstract

A method for determining a phase bias in the signal transmitted by at least one of the radiating elements of an active antenna on the ground emitting signals into space using a space-division multiple access SDMA method, implementing a step, for each reference receiver, of comparing, to a threshold, the difference between the value of a measurement of the power received by each reference receiver and the sum, out of the radiating elements of the subset beamforming in the direction of the reference receiver, of the differences between the equivalent isotropically radiated power in the direction of the reference receiver and the free-space path loss of each radiating element of the subset.

IPC Classes  ?

• H01Q 3/26 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture
• H04B 17/12 - Monitoring; Testing of transmitters for calibration of transmit antennas, e.g. of amplitude or phase

Abstract

A navigation system using Visible Light Communications (VLC), the associated transmitters and receivers, the navigation system comprising a plurality of VLC transmitters (201 to 207) and one or more GNSS receiver (430), each of the VLC transmitters being configured to transmit a positioning signal comprising a navigation message including time information, where the time information is a transmission time of a specific part of said navigation message derived from a GNSS reference time. The receivers (221) according to the invention are configured to calculate a position from either VLC pseudo ranges, GNSS pseudo ranges, or a combination thereof. The associated methods for transmitting positioning signals in a navigation system according to the invention, and for determining a position from a plurality of positioning signals transmitted by said navigation system.

IPC Classes  ?

• G01S 19/11 - Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing dedicated supplementary positioning signals wherein the cooperating elements are pseudolites or satellite radio beacon positioning system signal repeaters
• G01S 1/02 - Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
• G01S 5/16 - Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations using electromagnetic waves other than radio waves
• G01S 1/70 - Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using electromagnetic waves other than radio waves
• G01C 21/20 - Instruments for performing navigational calculations

Abstract

The invention discloses an improved GNSS receiver which determines a location of the receiver by combining a first location determined either from the standard PVT of a multi-frequency receiver and/or from a positioning aid like a map matching algorithm, inertial navigation system, WiFi localization system or other, and a second location determined by integrating the velocity from the standard PVT. The combination is based on a duty cycle or a combination of the duty cycle with a weighting of the error budgets of the first position and the second location. The improved receiver is preferably based on a standard receiver with an add-on software module which receives and processes data transmitted from the standard receiver by, for example, NMEA messages. The improved receiver allows a determination of a more precise and smoother trajectory in a simple way.

IPC Classes  ?

• G01S 19/22 - Multipath-related issues
• G01S 19/42 - Determining position
• G01S 19/32 - Multimode operation in a single same satellite system, e.g. GPS L1/L2
• G01S 19/46 - Determining position by combining measurements of signals from the satellite radio beacon positioning system with a supplementary measurement the supplementary measurement being of a radio-wave signal type
• G01S 19/47 - Determining position by combining measurements of signals from the satellite radio beacon positioning system with a supplementary measurement the supplementary measurement being an inertial measurement, e.g. tightly coupled inertial
• G01S 19/52 - Determining velocity

Abstract

The present disclosure concerns a broadband hyperspectral imaging spectrophotometer configured to analyze an object and includes an illumination assembly having a source for emitting a light beam and configured so that the light beam scans line by line the object to be analyzed, a focusing mirror, a first mirror folding, and a planar scanning mirror movable in rotation. The illumination assembly, the focusing mirror, the first folding mirror and the planar mirror are arranged to bring the light beam to the object along a line which will be displaced on the object via the scanning mirror. The imaging spectrophotometer further includes two measuring sensors by a distance between the object and the scanning mirror. The focusing mirror is movable in translation to adapt the imager to the measured distance by the measuring sensors.

IPC Classes  ?

• G02B 21/00 - Microscopes
• G02B 21/24 - Base structure
• G01J 3/28 - Investigating the spectrum
• G01N 21/64 - Fluorescence; Phosphorescence
• G01J 3/02 - Spectrometry; Spectrophotometry; Monochromators; Measuring colours - Details
• G01J 3/14 - Generating the spectrum; Monochromators using refracting elements, e.g. prism

Abstract

This solar panel includes a structure in contact with an ambient environment and at least two photovoltaic cells each defining a lateral contact face and including a base element, a grid of electric conductors and a protective element made from transparent material, the grid including at least one conductive wire extending along the lateral contact face. The two cells are arranged on the structure such that at least part of each of the lateral contact faces is arranged regarding the other part while forming a panel surface and such that the shortest path passing through the ambient environment between the opposite parts of the lateral faces of the two cells is equal to at least about 20 mm.

IPC Classes  ?

• H01L 31/0224 - Electrodes
• B64G 1/44 - Arrangements or adaptations of power supply systems using radiation, e.g. deployable solar arrays
• H01L 31/048 - Encapsulation of modules
• H01L 31/05 - Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
• H02S 99/00 - Subject matter not provided for in other groups of this subclass
• H01L 31/054 - Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
• H01L 31/042 - PV modules or arrays of single PV cells
• H01L 31/0445 - PV modules or arrays of single PV cells including thin film solar cells, e.g. single thin film a-Si, CIS or CdTe solar cells

Abstract

This solar panel (12) includes a structure (14) and at least two photovoltaic cells (16A, 16B) each defining a lateral contact face (30A, 30B) and including a base element (20A, 20B), a grid of electric conductors (24A, 24B) and a protective element (22A, 22B) made from transparent material, the grid (24A, 24B) including at least one conductive wire extending along the lateral contact face (30A, 30B). The cells (16A, 16B) are arranged on the structure (14) such that at least part of each of the lateral contact faces (30A, 30B) is arranged across from the other part. The solar panel (12) further includes a barrier (18A) made from dielectric material arranged on the structure (14) between the lateral contact faces and extending along the opposite parts of these faces (30A, 30B).

IPC Classes  ?

• B64G 1/44 - Arrangements or adaptations of power supply systems using radiation, e.g. deployable solar arrays
• H01L 31/042 - PV modules or arrays of single PV cells
• H01L 31/054 - Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
• H02S 20/30 - Supporting structures being movable or adjustable, e.g. for angle adjustment
• B64G 1/66 - Arrangements or adaptations of apparatus or instruments, not otherwise provided for
• H01L 31/048 - Encapsulation of modules
• H01L 31/05 - Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
• H01L 31/0445 - PV modules or arrays of single PV cells including thin film solar cells, e.g. single thin film a-Si, CIS or CdTe solar cells

Abstract

Disclosed is a remote spectroscopy device of the LIDAR type including a module for generating an emission signal, an emission module for sending the emission signal toward a targeted material, a receiving module for receiving a response signal and a module for postprocessing of the response signal to determine a composition of the targeted material. The generating module includes at least two laser sources, each laser source being able to generate a laser signal at a predetermined wavelength, an upstream mixer able to mix the laser signals generated by the different laser sources, and a first modulator able to modulate the composite signal at a first modulation frequency to form the emission signal.

IPC Classes  ?

• G01J 3/427 - Dual wavelength spectrometry
• G01N 21/31 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry

Abstract

A method of generating frequency combs composed of a predetermined number of rays, wherein the method includes the modulation of a main ray generated by a laser source (20), by a first radiofrequency signal at a first frequency value, by a second radio frequency signal at a second frequency value, and by a third radio frequency signal at a third frequency value. The second frequency value is equal to twice the first frequency value. The third frequency value is equal to three times the first frequency value.

IPC Classes  ?

• G01N 21/39 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
• G01S 7/48 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group
• G01S 17/88 - Lidar systems, specially adapted for specific applications
• G01S 7/484 - Transmitters
• G01N 21/17 - Systems in which incident light is modified in accordance with the properties of the material investigated

Abstract

Disclosed is a method of controlling a calculation device via a mobile element to generate at least one control command associated with its vectorial orientation. The mobile element includes sensors able to provide relative measurements and absolute measurements. The method includes the following steps: provision of an initial vectorial orientation; taking of measurements by the set of sensors; determination of a first elementary vectorial orientation from relative measurements and the prior vectorial orientation; determination of a second elementary vectorial orientation from absolute measurements; determination of the current vectorial orientation from the first and second elementary vectorial orientations; and association of a control command.

IPC Classes  ?

• G06F 17/00 - Digital computing or data processing equipment or methods, specially adapted for specific functions
• G08C 17/02 - Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
• G06F 3/038 - Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
• G06F 3/0346 - Pointing devices displaced or positioned by the user; Accessories therefor with detection of the device orientation or free movement in a 3D space, e.g. 3D mice, 6-DOF [six degrees of freedom] pointers using gyroscopes, accelerometers or tilt-sensors
• A63F 13/211 - Input arrangements for video game devices characterised by their sensors, purposes or types using inertial sensors, e.g. accelerometers or gyroscopes
• G06F 3/033 - Pointing devices displaced or positioned by the user; Accessories therefor
• H04W 4/02 - Services making use of location information

Abstract

The invention discloses a constellation of relay vehicles comprising a receiver of navigation signals and a transmitter of positioning signals to an area of service where a number of rovers manoeuver, wherein the position of the relay vehicle may be adjusted to optimize one or more of an SNR or a DOP index of the positioning signals. In some embodiments, the optimal configuration of the constellation of relay vehicles may be further defined based on priority indexes allocated to the rovers. The invention is applicable to terrestrial or underwater rovers, respectively serviced by aerial or nautical relay vehicles.

IPC Classes  ?

• G01C 15/00 - Surveying instruments or accessories not provided for in groups
• G01S 19/10 - Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing dedicated supplementary positioning signals
• G01S 19/46 - Determining position by combining measurements of signals from the satellite radio beacon positioning system with a supplementary measurement the supplementary measurement being of a radio-wave signal type
• G05D 1/02 - Control of position or course in two dimensions
• G01S 5/10 - Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements
• H04W 4/00 - Services specially adapted for wireless communication networks; Facilities therefor
• G01S 19/14 - Receivers specially adapted for specific applications
• G05D 1/10 - Simultaneous control of position or course in three dimensions
• G01S 19/11 - Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing dedicated supplementary positioning signals wherein the cooperating elements are pseudolites or satellite radio beacon positioning system signal repeaters
• G01S 1/00 - Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
• B64C 39/02 - Aircraft not otherwise provided for characterised by special use
• H04W 4/02 - Services making use of location information
• G01S 1/70 - Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using electromagnetic waves other than radio waves
• H04W 4/40 - Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
• G01S 1/68 - Marker, boundary, call-sign, or like beacons transmitting signals not carrying directional information

Abstract

This machine includes a tool (30) actuated by an actuating module (32); a dual-frequency satellite positioning module (40) able to take into account corrections relative to the disruptions affecting the propagation of radio navigation signals emitted by each of the visible radio navigation satellites and that are caused by the ionosphere, so as to determine an absolute position of the machine, and consequently of the tool, which is precise to within a centimeter; and a computer (50) able to compare the instantaneous absolute position of the tool and an absolute position of a current revisiting point, selected from among the revisiting points of a revisiting plan, the computer then being able to command the actuation module.

IPC Classes  ?

• A01C 21/00 - Methods of fertilising
• A01B 39/02 - Other machines specially adapted for working soil on which crops are growing with non-rotating tools
• A01B 69/04 - Special adaptations of automatic tractor steering, e.g. electric system for contour ploughing
• A01C 7/00 - Sowing
• G01S 19/13 - Receivers
• A01B 49/06 - Combinations of soil-working tools with non-soil-working tools, e.g. planting tools for sowing or fertilising
• A01B 79/00 - Methods for working soil

Abstract

A GNSS receiver, and an associated method are presented for calculating a position from positioning signals transmitted by a plurality of GNSS transmitters. For example the receiver compsises a first and a second signal acquisition elements having different polarizations, the receiver being configured to process the signals received on the first signal acquisition element to calculate first pseudo range measurements, and the signals received on the second signal acquisition element to calculate second pseudo range measurements and associated quality indicators. The receiver further comprises a calculation circuit configured to select at least one of the second pseudo range measurements depending on the quality indicators, and compare it with the corresponding first pseudo range measurement, and select at least three first pseudo range measurements based on the comparison results to calculate a position.

IPC Classes  ?

• G01S 19/22 - Multipath-related issues
• G01S 19/36 - Constructional details or hardware or software details of the signal processing chain relating to the receiver frond end

Abstract

The invention discloses a positioning device configured to acquire its own GNSS position, the GNSS positions of rovers in an area around the positioning device and the relative positions of the positioning device to the rovers. The positioning device is configured to calculate a best-fit position based on this data and their confidence indexes. The positioning devices may communicate directly or through a navigation assistance centre. The best-fit position may be provided with indexes of confidence, availability and integrity. In some embodiments, the positioning device of the invention may be robust enough to generate commands to the driving controls of an autonomous vehicle.

IPC Classes  ?

• G08G 1/16 - Anti-collision systems
• G01C 21/30 - Map- or contour-matching
• G01S 19/51 - Relative positioning
• H04W 4/44 - Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
• H04W 4/024 - Guidance services
• H04W 4/46 - Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
• H04W 4/02 - Services making use of location information
• G01S 19/48 - Determining position by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system
• G01S 5/02 - Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
• G01S 5/00 - Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations
• G08G 1/0967 - Systems involving transmission of highway information, e.g. weather, speed limits
• H04L 29/08 - Transmission control procedure, e.g. data link level control procedure

Abstract

remove the contribution of the detected reflected propagation paths from one of the received signal or the output of the first correlation function.

IPC Classes  ?

• G01S 19/22 - Multipath-related issues
• H04B 1/709 - Correlator structure
• H04B 1/7113 - Determination of path profile

Abstract

The invention relates to a method and device for characterizing at least one optical aberration of an optical system of an image acquisition device, the optical system having an associated optical transfer function that is dependent on the aberrations, the image acquisition device being capable of acquiring at least two images in a field of image capture in a manner so as to introduce a differential aberration between the two images, each image being defined by a digital image signal. The method includes the obtaining (50) of a first image and a second image of a same given zone of the field of image capture, the second image being acquired with a differential aberration (Δaberr) relative to the first image, each image acquisition having an associated optical transfer function. An optical aberration is characterized (58, 60) by the calculation of at least one parameter by minimization of a functional expressed as a function of the first and second images acquired, from a modelling of the optical transfer functions associated with the two image acquisitions dependent on the aberrations of the image acquisition device as well as on the differential aberration (Δaberr).

IPC Classes  ?

• G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
• G01M 11/02 - Testing optical properties
• G01J 3/02 - Spectrometry; Spectrophotometry; Monochromators; Measuring colours - Details
• G01J 3/28 - Investigating the spectrum

Abstract

The invention relates to a daytime and nighttime stellar sensor (1), comprising: at least one video camera (2) suitable for taking images of stars (3) in the sky; and a control unit (4), characterized in that it furthermore comprises: a polarizer (5), the control unit (4) being configured: to obtain an estimation of a direction of polarization of the polarized light received from the sky by the video camera (2); and to control the orientation of the polarizer (5) so that said polarizer (5) filters polarized light from the sky directed toward the video camera (2) and having said polarization direction.

IPC Classes  ?

• G01C 17/34 - Sun- or astro-compasses
• G01C 21/02 - Navigation; Navigational instruments not provided for in groups by astronomical means
• G01C 21/16 - Navigation; Navigational instruments not provided for in groups by using measurement of speed or acceleration executed aboard the object being navigated; Dead reckoning by integrating acceleration or speed, i.e. inertial navigation
• G01C 21/18 - Stabilised platforms, e.g. by gyroscope

Abstract

The invention discloses an antenna assembly comprising one or more sensors, possibly a fish-eye camera which produces images of the sky above the antenna, said images being processed to identify open sky and occulted sky areas, said identification being used to generate an antenna gain pattern shape wherein null zones are placed on the occulted sky areas, so as to eliminate the GNSS signals which are affected by multipath reflection. The antenna assembly of the invention may be used with any GNSS receiver of the prior art. No specific data on the location of the receiver or its orientation is needed to perform the method of the invention, while in some embodiments, it may be useful to send some information on the number of satellites in view in the open sky.

IPC Classes  ?

• G01S 19/22 - Multipath-related issues
• G01S 19/26 - Acquisition or tracking of signals transmitted by the system involving a sensor measurement for aiding acquisition or tracking
• G01S 19/36 - Constructional details or hardware or software details of the signal processing chain relating to the receiver frond end
• H01Q 3/36 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means with variable phase-shifters
• G01S 17/86 - Combinations of lidar systems with systems other than lidar, radar or sonar, e.g. with direction finders
• G01S 13/86 - Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
• H04N 5/232 - Devices for controlling television cameras, e.g. remote control
• H04N 5/33 - Transforming infrared radiation

Abstract

The positioning signals broadcast by GNSS constellations are affected by significant errors, notably due to the crossing of the ionospheric layer or of the tropospheric layer. Several unwieldy means have been deployed to provide professional users with corrections of said errors. These means, however, all require the knowledge of at least one precise reference point at a given distance. According to the invention, positioning receivers that are not very precise, such as smartphones, present in a geographical zone, of unknown precise position, can contribute to the production of precise atmospheric error corrections if said receivers are sufficiently numerous.

IPC Classes  ?

• G01S 19/07 - Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing data for correcting measured positioning data, e.g. DGPS [differential GPS] or ionosphere corrections
• G01S 19/40 - Correcting position, velocity or attitude
• G01S 19/25 - Acquisition or tracking of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS
• G01S 5/02 - Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves

Abstract

The positioning signals broadcast by the GNSS constellations on civilian frequencies are likely to be counterfeited, while the use of authentic signals is becoming increasingly critical for certain applications. According to the invention, the authentication of GNSS signals is performed by analysis of consistency between the measurements of parameters characteristic of the signals (direction of arrival, amplitude, phase) and their state model, said state model taking account of an emulation by software and electronic means of displacements of the phase centre of the antenna and/or of the main lobe of the radiation pattern. Advantageously, these displacements are generated by a pseudo-random code. Advantageously, the analysis of consistency between measurements and models is a multiple-criterion analysis, the combination of criteria being chosen as a function of a reception quality indicator and/or of a presumed location.

IPC Classes  ?

• H04K 1/00 - Secret communication
• G01S 19/21 - Interference related issues

Abstract

A deformable mirror comprises a deformable membrane extending at rest in a first plane and having a reflecting front face and a back face opposite the front face, a supporting structure, an actuator having a first and second end, the first end fixed to the supporting structure, the second end displaced relative to the first end on a first axis substantially at right angles to the first plane to exert, on the back face, an axial load on the first axis, to locally deform the deformable membrane. The mirror comprises a plate that is substantially flat in a second plane substantially parallel to the first plane, positioned between the actuator and deformable membrane, linked to the back face and deformed when the actuator exerts the axial load, and the plate is rigid in the second plane to take up loads applied to the mirror in the second plane.

IPC Classes  ?

• G02B 7/182 - Mountings, adjusting means, or light-tight connections, for optical elements for mirrors for mirrors
• G02B 26/08 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light

Abstract

The positioning receiver according to the invention comprises means for storing configuration information and information on its reception conditions, which is processed in order to calculate a current and/or predicted precision of the positioning calculation. Advantageously, at least some of this information is integrated into a variation model of a Kalman filter integrated into the receiver. The invention notably allows a more rapid convergence on a reference precision in a mono-frequency operating mode and transitions between a mono-frequency and bi-frequency mode to be smoothed. Advantageously, the precision information is delivered graphically or in numerical form to the user.

IPC Classes  ?

• G01S 19/39 - Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO

Abstract

The invention discloses a recovery assistance device for helping in rescuing victims of avalanches, earthquakes or boat capsizes. The device is capable of calculating a position from combinations of a previous position and distances to other devices. Different configurations are possible, with a basic configuration consisting of a smart phone having waveform generation capabilities, processing and GNSS receiving capabilities. The device is programmed to be used in a defined mission by an application. The device can also receive a number of add-ons as a battery add-on, a modem add-on, a sound wave generation add-on, antennas, and protection, possibly waterproof, if adequate. Devices of the same type can be carried by people to be rescued and rescuers. The device is therefore quite versatile and can increase significantly the efficiency of rescue teams in different use case scenarios.

IPC Classes  ?

• H04W 24/00 - Supervisory, monitoring or testing arrangements
• G01S 19/26 - Acquisition or tracking of signals transmitted by the system involving a sensor measurement for aiding acquisition or tracking
• G01S 19/17 - Emergency applications
• A63B 29/02 - Mountain guy-ropes or accessories, e.g. avalanche ropes; Means for indicating the location of accidentally buried, e.g. snow-buried, persons
• G01S 19/49 - Determining position by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system whereby the further system is an inertial position system, e.g. loosely-coupled
• G01S 19/51 - Relative positioning
• G01S 5/02 - Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
• G01S 5/18 - Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations using ultrasonic, sonic, or infrasonic waves
• G01S 5/30 - Determining absolute distances from a plurality of spaced points of known location
• H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

Abstract

generating (E3) by the thruster a gas cloud (G) above the sounding rocket.

IPC Classes  ?

• B64G 1/40 - Arrangements or adaptations of propulsion systems
• B64G 1/00 - Cosmonautic vehicles
• B64G 1/10 - Artificial satellites; Systems of such satellites; Interplanetary vehicles
• B64G 1/24 - Guiding or controlling apparatus, e.g. for attitude control
• B64G 1/56 - Protection against meteoroids or space debris

Abstract

The invention relates to a method for transferring a space payload from a first orbit to a second orbit. Said method is characterized in that the space payload, moving about the first orbit, is attached to a removable orbital towing assistance device including at least one fuel pouch. Said method includes the steps of: —attaching (E1) an orbital transfer vehicle to the removable orbital towing assistance device; and —transferring (E2) the space payload and the removable orbital towing assistance device to the second orbit by means of the orbital transfer vehicle. The invention also relates to a removable orbital towing assistance device intended for a space payload and an orbital transfer vehicle and enabling direct supply of fuel to the vehicle and/or the space payload.

IPC Classes  ?

• B64G 1/00 - Cosmonautic vehicles
• B64G 1/40 - Arrangements or adaptations of propulsion systems
• B64G 1/64 - Systems for coupling or separating cosmonautic vehicles or parts thereof, e.g. docking arrangements
• B64G 1/10 - Artificial satellites; Systems of such satellites; Interplanetary vehicles

Abstract

The invention relates to a communication device for arranging in an aircraft cabin, said device comprising: an antennae assembly designed so as to emit and receive communication data in a first frequency band of a communication network and to receive localization data in a second frequency band of a localization network, said antennae assembly comprising an antenna having a pattern of radiation revolving about a main axis, the radiation being at its maximum in the direction of said main axis, and a system for restraining the radiation, designed to limit the radiation outside said antenna axis; a modem connected to the antenna, designed so as to allow the emission and the reception of communication data via a communication network; and a localization data receiver.

IPC Classes  ?

• H01Q 1/28 - Adaptation for use in or on aircraft, missiles, satellites, or balloons
• H04B 7/185 - Space-based or airborne stations
• H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support
• H01Q 1/48 - Earthing means; Earth screens; Counterpoises
• H01Q 9/04 - Resonant antennas
• H01Q 1/22 - Supports; Mounting means by structural association with other equipment or articles
• H01Q 1/36 - Structural form of radiating elements, e.g. cone, spiral, umbrella

Abstract

a second discrimination circuit (530) configured to select one of said ambiguous discriminator value and said value calculated by the calculation circuit, and to generate a first non-ambiguous discriminator value, an amplitude of which is based on an amplitude of the selected value, and a sign of which is a sign of said value calculated by the calculation circuit.

IPC Classes  ?

• G01S 19/30 - Acquisition or tracking of signals transmitted by the system code related
• G01S 19/22 - Multipath-related issues

Abstract

A GNSS receiver comprising a circuit configured to receive a positioning signal comprising a carrier modulated by a subcarrier and a PRN code; a subcarrier and code tracking loop, comprising a first discrimination circuit, configured to calculate a first pseudo range from said received positioning signal and a first reference signal; a code tracking loop, comprising a second discrimination circuit, configured to calculate a second pseudo range from said received positioning signal and a second reference signal; and a calculation circuit configured to evaluate a difference between said first pseudo range and said second pseudo range, and to modify the output of the first discrimination circuit accordingly. The invention further addresses a method for calculating a pseudo-range in such a GNSS receiver.

IPC Classes  ?

• G01S 19/22 - Multipath-related issues
• G01S 19/30 - Acquisition or tracking of signals transmitted by the system code related
• G01S 19/29 - Acquisition or tracking of signals transmitted by the system carrier related
• G01S 19/44 - Carrier phase ambiguity resolution; Floating ambiguity; LAMBDA [Least-squares AMBiguity Decorrelation Adjustment] method

Abstract

the computer logic is configured to calculate the unbiased position and time measurement from pseudo ranges being determined from positioning signals originating from distinct satellites. A GNSS receiver further comprising a second computer logic configured to calculate a second unbiased position and time from the first position and time, and the second signal processing signals.

IPC Classes  ?

• G01S 19/29 - Acquisition or tracking of signals transmitted by the system carrier related
• G01S 19/33 - Multimode operation in different systems which transmit time stamped messages, e.g. GPS/GLONASS
• G01S 19/30 - Acquisition or tracking of signals transmitted by the system code related
• G01S 19/44 - Carrier phase ambiguity resolution; Floating ambiguity; LAMBDA [Least-squares AMBiguity Decorrelation Adjustment] method
• G01S 19/22 - Multipath-related issues

Abstract

The invention discloses a receiver of GNSS positioning signals which has embedded computer logic to select between a first operating mode, which uses all available frequencies, and a second operating mode, which uses only part of the available frequencies but in combination with available correction data. The selection is based on a comparison of an index of quality of reception at the receiver and a computed or predicted precision/confidence level of the corrections. A plurality of corrections types are possible, including a type using a local model and a type using collaborative corrections. In some embodiments, a selection and/or a combination of a plurality of local models may be made to optimize the accuracy of the corrections.

IPC Classes  ?

• G01S 19/07 - Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing data for correcting measured positioning data, e.g. DGPS [differential GPS] or ionosphere corrections
• G06F 9/451 - Execution arrangements for user interfaces
• G01S 19/43 - Determining position using long or short baseline interferometry
• G01S 19/32 - Multimode operation in a single same satellite system, e.g. GPS L1/L2
• G01S 19/39 - Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
• G01S 19/33 - Multimode operation in different systems which transmit time stamped messages, e.g. GPS/GLONASS
• G01S 19/22 - Multipath-related issues
• G01S 19/41 - Differential correction, e.g. DGPS [differential GPS]
• G01S 19/25 - Acquisition or tracking of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS
• G06F 3/0484 - Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
• G06F 8/38 - Creation or generation of source code for implementing user interfaces

Abstract

This machine includes a tool (30) actuated by an actuating module (32); a dual-frequency satellite positioning module (40) able to take into account corrections relative to the disruptions affecting the propagation of radio navigation signals emitted by each of the visible radio navigation satellites and that are caused by the ionosphere, so as to determine an absolute position of the machine, and consequently of the tool, which is precise to within a centimeter; and a computer (50) able to compare the instantaneous absolute position of the tool and an absolute position of a current revisiting point, selected from among the revisiting points of a revisiting plan, the computer then being able to command the actuation module.

IPC Classes  ?

• G01D 1/02 - Measuring arrangements giving results other than momentary value of variable, of general application giving mean values, e.g. root mean square values
• A01B 79/00 - Methods for working soil
• A01B 69/04 - Special adaptations of automatic tractor steering, e.g. electric system for contour ploughing
• A01B 49/06 - Combinations of soil-working tools with non-soil-working tools, e.g. planting tools for sowing or fertilising
• A01C 21/00 - Methods of fertilising
• A01B 39/02 - Other machines specially adapted for working soil on which crops are growing with non-rotating tools
• A01C 7/00 - Sowing
• G01S 19/13 - Receivers

Abstract

A system for manipulating a space object in space comprises an articulated structure, wherein the articulated structure comprises a single actuator configured to control, equally, the deployment of the structure in space, the gripping of the space object and the folding down of the articulated structure. Developments describe the use of a fixed supporting structure, a threaded rod, a tapped whorl guided by the threaded rod and a set of articulated bars held by pivot links at their interfaces on the tapped whorl and on the fixed supporting structure. Various mechanical configurations are described, notably gripping devices comprising rollers for locking and/or unlocking the space object by separation of the articulated bars. A method of regulation, of control and of adjustment of the manipulation is provided.

IPC Classes  ?

• B64G 1/64 - Systems for coupling or separating cosmonautic vehicles or parts thereof, e.g. docking arrangements
• B64G 4/00 - Tools specially adapted for use in space
• B64G 1/10 - Artificial satellites; Systems of such satellites; Interplanetary vehicles

Abstract

R for the repeater module lies within the interval [0.84; 1.12], and the repeater module consists of a number of floors, and the value of Xmck varies as a function of the floor k and of its position in the repeater module.

IPC Classes  ?

• B64G 1/10 - Artificial satellites; Systems of such satellites; Interplanetary vehicles
• B64G 1/44 - Arrangements or adaptations of power supply systems using radiation, e.g. deployable solar arrays

Abstract

A method for determining assistance data to facilitate processing of radio-navigation signals from a set of radio-navigational satellites of a reference network, each radio-navigational satellite broadcasting at least a first radio-navigation signal on a first frequency and a second radio-navigation signal on a second frequency, the second frequency being distinct from the first frequency, is provided.

IPC Classes  ?

• G01S 19/25 - Acquisition or tracking of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS
• G01S 19/44 - Carrier phase ambiguity resolution; Floating ambiguity; LAMBDA [Least-squares AMBiguity Decorrelation Adjustment] method
• G01S 19/04 - Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing carrier phase data

Abstract

A global navigation satellite system (“GNSS”) positioning method is provided, based upon a GNSS radio signal that comprises a navigation message transmitted as a succession of data packets. Each data packet is present in the GNSS radio signal as a sequence of symbols obtained by application of a code preceded by a synchronization symbol header. The data packets are organized internally into data fields. At least certain data packets of the succession of data packets contain a synchronization bit field translated by application of the code into a synchronization symbol pattern.

IPC Classes  ?

• G01S 19/24 - Acquisition or tracking of signals transmitted by the system
• H04W 56/00 - Synchronisation arrangements
• G01S 19/02 - Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO - Details of the space or ground control segments
• H04L 7/04 - Speed or phase control by synchronisation signals
• G01S 19/21 - Interference related issues

Abstract

Disclosed is an optical time-stamping device, including an optical instrument with a retina having a field of view and being able to produce on the retina images of the field of view, and a high accuracy reference clock signal receive. The time-stamping device also includes: a lighting source at a distance from the retina of an optical instrument, and configured to emit a light signal in the direction of the retina of an optical instrument and in the field of view of an optical instrument, and a control unit connected to the reference clock signal receiver by a first connection and to the lighting source by a second connection, and configured for controlling the lighting source for emitting a light signal in a synchronized way with the reference clock signal. An associated image sensing system and optical time-stamping method are also disclosed.

IPC Classes  ?

• H04N 5/232 - Devices for controlling television cameras, e.g. remote control
• H04N 5/247 - Arrangement of television cameras
• G06F 17/30 - Information retrieval; Database structures therefor
• G04F 13/02 - Apparatus for measuring unknown time intervals by means not provided for in groups using optical means

Abstract

A hyperfrequency interconnection device between two components is provided, each component comprising an upper face and a signal line arranged on the upper face, the planes containing the upper faces of the components being separated by a distance known as the height difference. The hyperfrequency interconnection device comprises a substrate comprising a lower face and an upper face defined by a first axis and a second axis perpendicular to the first axis, a signal line arranged on the lower face of the substrate, a projection of the signal line into the plane of the upper face forming the first axis, at least two contact pads capable of electrically connecting the signal line of the device to the signal line of the components. The upper face of the substrate is corrugated along the second axis, capable of conferring on the substrate flexibility along the first axis.

IPC Classes  ?

• H05K 1/02 - Printed circuits - Details
• H01P 1/04 - Fixed joints
• H01P 5/02 - Coupling devices of the waveguide type with invariable factor of coupling
• B22F 7/04 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite layers with one or more layers not made from powder, e.g. made from solid metal
• H05K 1/11 - Printed elements for providing electric connections to or between printed circuits
• H05K 3/10 - Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
• H01L 23/00 - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS - Details of semiconductor or other solid state devices

Abstract

A global navigation satellite system (“GNSS”) positioning method is provided, based upon a GNSS radio signal that includes a navigation message transmitted as a sequence of frames, each frame being composed of a plurality of subframes, each of which contains a first set of ephemeris and clock correction data (DECH) sufficient for computing a satellite position and a satellite clock error. Each subframe furthermore contains a second set of DECH, more compact than the first set of DECH, but sufficient for computing satellite position and satellite clock error to a lesser degree of accuracy, at least two copies of the second set of DECH being present in each subframe, such that the timing difference between two consecutive copies does not exceed 70% of the subframe duration.

IPC Classes  ?

• G01S 19/13 - Receivers
• G01S 19/02 - Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO - Details of the space or ground control segments

Abstract

The invention concerns a helical antenna comprising a shape of revolution and a plurality of radiating strands helically wound around the shape of revolution, characterized in that each radiating strand is defined by a repetition of a fractal pattern comprising segments formed by a sinusoidal curve.

IPC Classes  ?

• H01Q 1/36 - Structural form of radiating elements, e.g. cone, spiral, umbrella
• H01Q 11/08 - Helical antennas

Abstract

An inertial actuation magnetohydrodynamic wheel (2) comprising a torus-shaped fluid ring (3) filled with a conductive liquid, at least one effective area (24, 26, 28) for setting the liquid into motion, and at least one magnetohydrodynamic pump (4, 6, 8). The ratio of the set back distance of any magnetic conduction element (24, 26, 28) of the air gap of any electromagnetic pump (4, 6, 8) over the internal size of the fluid ring (3) is greater than or equal to 0.5 and the fluid ring (3) comprises at least two distinct effective areas (24, 26), for setting the conductive liquid into motion, angularly spaced apart by at least 120°.

IPC Classes  ?

• B64G 1/00 - Cosmonautic vehicles
• B64G 1/28 - Guiding or controlling apparatus, e.g. for attitude control using inertia or gyro effect
• H02K 44/08 - Magnetohydrodynamic [MHD] generators
• G01C 19/12 - Rotors fluid driven
• G01C 19/14 - Fluid rotors
• H02K 44/16 - Constructional details of the magnetic circuits
• B64G 1/32 - Guiding or controlling apparatus, e.g. for attitude control using earth's magnetic field

Abstract

This invention relates to a propulsion bay to be transported, at least temporarily, in a space launch vehicle and comprising an adapter that co-operates with at least one system located, at least temporarily, on board the bay, said system comprising an electrical power supply. The bay is characterized in that it also comprises at least one electric space propulsion engine that can be powered by the power supply of the system.

IPC Classes  ?

• B64G 1/40 - Arrangements or adaptations of propulsion systems
• B64G 1/42 - Arrangements or adaptations of power supply systems
• B64G 1/64 - Systems for coupling or separating cosmonautic vehicles or parts thereof, e.g. docking arrangements
• B64G 1/44 - Arrangements or adaptations of power supply systems using radiation, e.g. deployable solar arrays
• B64G 1/00 - Cosmonautic vehicles
• B64G 1/24 - Guiding or controlling apparatus, e.g. for attitude control
• B64G 1/50 - Arrangements or adaptations of devices for control of environment or living conditions for temperature control

Abstract

A method for transmitting data between a terminal and a gateway, the data being transported by Ethernet frames comprising an Ethernet header and a payload, which are themselves encapsulated in lower level packets each comprising a header containing a medium access address, comprises the following steps: determining contexts common to frames whose Ethernet headers have identical fields, and defining an identifier of each the context; associating all or some of the frames with the corresponding context identifiers and suppressing the fields from their Ethernet headers; and introducing the context identifier of each frame for which the fields of the Ethernet header have been suppressed from the header of the lower level packet encapsulating it by replacing its medium access address. A method for receiving data transmitted by means of such a method.

IPC Classes  ?

• H04L 12/28 - Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
• H04J 3/24 - Time-division multiplex systems in which the allocation is indicated by an address
• H04J 3/18 - Time-division multiplex systems using frequency compression and subsequent expansion of the individual signals
• H04W 72/04 - Wireless resource allocation
• H04B 7/185 - Space-based or airborne stations
• H04L 12/741 - Header address processing for routing, e.g. table lookup
• H04L 29/06 - Communication control; Communication processing characterised by a protocol

Abstract

The invention relates to a multibeam source for a multibeam antenna, the source comprising a plurality of identical basic sources, such that the basic sources are combined into identical subnetworks around a central basic source, each subnetwork forming a beam, and such that two adjacent subnetworks comprise at least one common basic source, wherein the source includes: a supply and polarization stage for supplying power to the central basic sources and polarizing the electromagnetic field at the accesses of the central basic sources; and a stage for distributing the power from the central basic sources among the basic sources of the corresponding subnetwork and those common to a plurality of subnetworks according to a predetermined amplitude law.

IPC Classes  ?

• H01Q 25/00 - Antennas or antenna systems providing at least two radiating patterns
• H01P 5/12 - Coupling devices having more than two ports
• H01Q 19/17 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source comprising two or more radiating elements
• H01Q 21/06 - Arrays of individually energised antenna units similarly polarised and spaced apart
• H01Q 15/24 - Polarising devices; Polarisation filters
• H01Q 19/10 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
• H01Q 21/00 - Antenna arrays or systems

Abstract

A sensor for determining gas content of a two phase fluid flowing in a flow line, the sensor including a sleeve configured to be arranged in the flow line in a stream of fluid. The sleeve includes a plurality of measurement electrodes that, in pairs, define a plurality of subdivision spaces subdividing a flow section of the sleeve. The sensor also includes switch and measurement members coupled to the measurement electrodes to control switching of each subdivision space of the sleeve between a measuring state and a non-measuring state. The switch and measurement members are configured to selectively switch the state of each of the subdivision spaces independently of one another.

IPC Classes  ?

• G01N 27/22 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance

Abstract

A radionavigation signal tracking device comprises a first and a second tracking stage for radionavigation signals. The first tracking stage comprises a first carrier phase-locked loop. The latter produces a first error signal arising from a phase difference between the first carrier and its replica. The phase of the replica of the first carrier is adjusted with the first error signal. The second tracking stage comprises a second carrier phase-locked loop. The latter produces a second error signal arising from a difference between the first phase difference and a phase difference between the second carrier and the replica thereof. The phase of the replica of the second carrier is adjusted with the first and second error signals.

IPC Classes  ?

• G01S 19/29 - Acquisition or tracking of signals transmitted by the system carrier related
• G01S 1/02 - Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
• G01S 19/44 - Carrier phase ambiguity resolution; Floating ambiguity; LAMBDA [Least-squares AMBiguity Decorrelation Adjustment] method

Abstract

A device is provided for unfurling and refurling comprising at least one tape spring having an axis of unfurling and of refurling parallel to an axis X and a rotor capable of rotating about an axis Y perpendicular to the axis X, the tape spring being able, autonomously, to pass from a state in which it is wound around the rotor to an unwound state. The tape spring is mounted bent in two in the shape of a U and comprises a first end fixed rigidly to a first anchor point that may be secured to a stator or to the rotor and a second end wound around the rotor.

IPC Classes  ?

• B65H 75/34 - Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
• B64G 1/22 - Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
• B64G 1/44 - Arrangements or adaptations of power supply systems using radiation, e.g. deployable solar arrays
• B64G 1/50 - Arrangements or adaptations of devices for control of environment or living conditions for temperature control
• B64G 1/66 - Arrangements or adaptations of apparatus or instruments, not otherwise provided for

Abstract

i−1), each coding value of the series of coding values being obtained by a respective coding function applied to the block of information symbols of the corresponding burst of the series of bursts.

IPC Classes  ?

• H03M 13/00 - Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
• H03M 13/11 - Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits using multiple parity bits
• H03M 13/05 - Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
• H04L 1/00 - Arrangements for detecting or preventing errors in the information received
• H03M 13/27 - Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes using interleaving techniques
• H03M 13/17 - Burst error correction, e.g. error trapping, Fire codes
• H03M 13/13 - Linear codes
• H03M 13/15 - Cyclic codes, i.e. cyclic shifts of codewords produce other codewords, e.g. codes defined by a generator polynomial, Bose-Chaudhuri-Hocquenghem [BCH] codes
• H03M 13/29 - Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes

Abstract

A method is provided of dynamic allocation of shared resources in a communication network, consisting in defining, in a time-frequency plan, a superframe of a given duration ΔT and a given spectral width Δf, made up of one or more frames, each defining a regular time-frequency grid, of which one square, referred to as a time-frequency unit, constitutes the smallest time and frequency interval allocable to a user of said network within said frame, said method consisting in reserving, on each carrier frequency of a frame, at least one block of a number K, greater than or equal to 1, of time-frequency units which can be dynamically allocated to a user for communication or for synchronization.

IPC Classes  ?

• H04W 28/04 - Error control
• H04W 72/04 - Wireless resource allocation
• H04B 7/185 - Space-based or airborne stations
• H04B 7/204 - Multiple access
• H04B 7/26 - Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile

Abstract

Method for calibrating a linearizer and linearized electronic component the method comprises predistortion, in a predistortion linearizer, of a signal upstream of an electronic component to compensate nonlinear distortion. Determining predistortion setting parameters comprises applying a bifrequency test signal to the component and measuring the relative amplitudes of the lines at the output of the component. A variable indicative of the magnitude |Kp| of the AM/PM conversion coefficient of the component is calculated on the basis of these measurements. The predistortion setting parameters are adjusted so as to minimize |Kp|. The method may in particular be implemented in a linearized amplifier device and in an amplifier test bench.

IPC Classes  ?

• H04K 1/02 - Secret communication by adding a second signal to make the desired signal unintelligible
• H04L 25/03 - Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
• H04L 25/49 - Transmitting circuits; Receiving circuits using three or more amplitude levels
• H04B 1/04 - Circuits
• H03F 1/32 - Modifications of amplifiers to reduce non-linear distortion

Abstract

The invention relates to a polarization-insensitive optical filter centered on a wavelength measured in vacuum, comprising: first and second waveguides each having a propagation mode; a first grating formed in or on the surface of the first waveguide, the first grating being periodical at least along a first axis Ox defining a first orthonormal base Oxyz; a second grating formed in or on the surface of the second waveguide, the second grating being periodical at least along a second axis Ox′ defining a second orthonormal base Ox′y′z; wherein the first and second grating are provided one above another and are such that the first axis Ox and the second axis Ox′ define an angle ξ different from ±π/2 radians so that, when the first grating is illuminated by a light beam, the propagation modes are excited and have orthogonal fields for an angle of incidence of the light beam.

IPC Classes  ?

• G02B 6/34 - Optical coupling means utilising prism or grating
• G02B 5/18 - Diffracting gratings
• G01J 3/18 - Generating the spectrum; Monochromators using diffraction elements, e.g. grating
• G02B 5/20 - Filters
• G02B 5/28 - Interference filters

Abstract

A hybrid cellular radiocommunication system includes base stations defining terrestrial cells covered by satellite umbrella cells. The base stations are distributed so as to be distinguishable by the satellite cell according to a time-invariant distribution function, and the system includes a device for maintaining, permanently and in the same link direction, congruence of the coverage of each satellite cell with respect to coverage of the terrestrial cells associated with the base stations contained in the satellite cell, with coverage of a satellite cell being congruent with a predetermined terrestrial coverage set when the predetermined coverage set is included in the satellite coverage.

IPC Classes  ?

• H04W 4/00 - Services specially adapted for wireless communication networks; Facilities therefor
• H04B 7/185 - Space-based or airborne stations
• H04B 7/204 - Multiple access
• H04W 84/06 - Airborne or Satellite Networks
• H04W 88/08 - Access point devices
• H04W 16/28 - Cell structures using beam steering
• H04W 92/04 - Interfaces between hierarchically different network devices

Abstract

In the field of active phase-control antennas, a method is provided for calibrating the phase center of an active antenna including a plurality of sub-elements able to receive a useful signal emitted by a satellite, the calibration being defined as a function of the reception characteristics of a reference signal at the level of each sub-element, the reference signal being emitted by the same satellite on a frequency band substantially equal to the frequency band of the useful signal and whose theoretical reception characteristics are known.

IPC Classes  ?

• H01Q 3/26 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture
• G01S 19/23 - Testing, monitoring, correcting or calibrating of a receiver element

Abstract

A method is provided for demodulating a signal carrying a message transmitted by a terrestrial beacon, executed by a system comprising a constellation of satellites suitable for detecting said signal and for repeating it towards receiving stations on the ground, and an analysis module suitable for receiving signals from said stations. Each receiving station transmits the signals that it receives from the satellite to the analysis module, said module realigning said signals in frequency and/or in time relative to one another, combining the realigned signals to generate a synthetic signal having an enhanced signal-to-noise ratio, and determining the content of said message and/or the modulation parameters of said synthetic signal. The method applies notably to the accurate and reliable location of distress beacons by a satellite system.

IPC Classes  ?

• G01S 1/08 - Systems for determining direction or position line
• G01S 1/68 - Marker, boundary, call-sign, or like beacons transmitting signals not carrying directional information
• G01S 5/12 - Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial

Abstract

The method for detecting AIS messages involves providing digital data representing signals received by a satellite on at least one AIS channel, and identifying a candidate message in the digital data by correlating the digital data with a hypothetical fragmentary message, the hypothetical fragmentary message includes at least one AIS message fragment which is dependent on transmission time and/or transmitter position and which is determined with the assistance of a database of AIS transmitters.

IPC Classes  ?

• H04B 7/185 - Space-based or airborne stations
• G08G 1/16 - Anti-collision systems

Abstract

The converter comprises an inverter powered by a DC current source. The inverter powers a conversion unit operating on the basis of controlled magnetic switching obtained by means of power diodes and saturable inductors. A regulator can be used to produce a control voltage that is a function of the output voltage which is regulated with the injection of the control voltage into the circuit comprising the smoothing inductors. According to the invention, during each operating cycle, one of the power diodes is locked when the other power diode switches to conduction mode, such as to create a phase displacement between the input voltage of the conversion unit and the input current of same. The phase displacement angle is a function of the control voltage.

IPC Classes  ?

• H02M 3/335 - Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

The converter comprises an inverter and a conversion unit in which a transformer powers a controlled rectifier formed by saturable inductors and power diodes. According to the invention, a series reactive circuit associated with the transformer co-operates with the controlled rectifier for the phase displacement of the voltage applied at the primary of the transformer in relation to the current flowing therethrough. The phase displacement is regulated by a control voltage as a function of the variations in the output voltage of the converter.

IPC Classes  ?

• H02M 3/335 - Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

The invention relates to a device for correcting at least one optical aberration, of known evolution of an optical system, the device comprising: a deformable mirror (1) having a contour; means (2) for deforming the mirror; characterized in that the mirror (1) has a geometry selected such that the contour of the mirror (1) is defined from a composite function of said at least one aberration and in that the means (2) for deforming the mirror are adapted to apply a flexing moment on the edges of the mirror, the deformable mirror being concave or convex when it is deformed.

IPC Classes  ?

• G02B 5/08 - Mirrors
• G02B 7/182 - Mountings, adjusting means, or light-tight connections, for optical elements for mirrors for mirrors
• G02B 27/00 - Optical systems or apparatus not provided for by any of the groups ,
• G02B 26/08 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light

Abstract

A propulsion system of a spacecraft comprises a main tank adapted to contain a volume of propellant and a pressurizing gas which applies pressure to the propellant. The main tank comprises a membrane delimiting an upper volume to contain the pressurizing gas and an inferior volume to contain the propellant, the gas applying the pressure to the propellant by means of the membrane. A pressurization circuit is connected directly to the main tank. The propulsion system further comprises an auxiliary tank adapted to contain pressurizing gas. The auxiliary tank is connected directly to the main tank by means of the pressurization circuit. When in operation, gas contained in the auxiliary tank expands continuously with the gas contained in the upper volume of the main tank, the pressures prevailing in the upper volume of the main tank, in the pressurization circuit and in the auxiliary tank being identical. The auxiliary tank is dimensioned so that the maximal volume of propellant of the main tank is greater than the volume of propellant which the main tank can contain without an auxiliary tank.

IPC Classes  ?

• F02K 9/00 - Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
• B64G 1/40 - Arrangements or adaptations of propulsion systems
• F02K 9/50 - Feeding propellants using pressurised fluid to pressurize the propellants

Abstract

A high-throughput multi-beam telecommunication antenna is configured to cover a geographical area from a geostationary orbit. It comprises a single reflector and a feed block configured so that each elementary feed is able to generate a different unique beam, the angular separation of any two adjacent primary beams is substantially equal to the angular separation of any two adjacent secondary beams, and the spillover energy losses associated with each source are between 3 and 10 dB, preferably between 3 and 7.5 dB.

IPC Classes  ?

• H01Q 25/00 - Antennas or antenna systems providing at least two radiating patterns
• H01Q 1/28 - Adaptation for use in or on aircraft, missiles, satellites, or balloons
• H01Q 13/02 - Waveguide horns

Abstract

A waveguide orthomode transducer, comprises: a junction having a main waveguide and four auxiliary waveguides lying along the two orthogonal main axis of the junction and defining four quadrants; a combination network comprising: two magic tees, each having an E-port, two opposed common-ports, and a H-port; an H-plane tee junction having a Σ-port and two opposed common-ports; and an E-plane tee junction having a Δ-port and two opposed common-ports. Two auxiliary waveguides define a first quadrant are respectively connected to the common-ports of one of the magic tees and the two other secondary waveguides defining a second quadrant opposite to the first quadrant are connected to the common-ports of the other magic tee. The tee junctions are used to connect similar magic tee ports so that the transducer separates towards two different outputs two orthogonally polarized signals entering at the main waveguide. Reciprocally, two signals entering respectively in the Σ-port and the Δ-port of the tees junctions are combined with orthogonal polarizations in the main waveguide.

IPC Classes  ?

• H01Q 1/50 - Structural association of antennas with earthing switches, lead-in devices or lightning protectors

Abstract

eme), for example.

IPC Classes  ?

• G01S 19/44 - Carrier phase ambiguity resolution; Floating ambiguity; LAMBDA [Least-squares AMBiguity Decorrelation Adjustment] method
• G01S 19/04 - Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing carrier phase data
• G01S 19/43 - Determining position using long or short baseline interferometry

Abstract

This invention relates to a system for emitting electromagnetic beams, comprising a network of elements for the far-field emission of electromagnetic beams, the signals coming from and/or arriving towards each element weighted by excitation coefficients digitally determined by calculation means. According to the invention, the system comprises: a second separate network of sensors arranged close to the network of radiating elements in order to measure the near field radiated by the elements, means for calculating the far field radiated by the network from the near field actually measured by the sensors, and means for calculating the correction of the excitation coefficients of the elements from the difference between the far field calculated from the measurement of the near field and a pre-determined nominal far field.

IPC Classes  ?

• H01Q 3/00 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system

Abstract

A method of analyzing electrical stability of an active circuit splits a frequency response of an electrical or electronic circuit according to sub-bands (134, 136, 138) and in each sub-band (134, 136, 138) implements a step of determining an identification transfer function adapted for a stability analysis. The step of determining the transfer function is automatic and executed in the form of an identification loop, parameterized according to a current order of transfer function, and stopped when the norm of a phase error function for the error between the phase (222, 224, 226) of the current identified transfer function and that of the frequency response has exceeded a predetermined phase error threshold value.

IPC Classes  ?

• G06F 17/50 - Computer-aided design

Abstract

global positioning of the receiver with the help of measurements of code and phase and the coherent widelane ambiguities (16, 18). The global positioning comprises, for each satellite, the determination (16) of a pseudo distance by means of an ionosphere-free combination of the measurements of code and of the difference of the phase measurements, compensated for the widelane ambiguity, this ionosphere-free combination being optimized in terms of noise. The pseudo distance is determined by receiving the satellite clock values associated with the ionosphere-free combination from the reference system.

IPC Classes  ?

• G01S 19/44 - Carrier phase ambiguity resolution; Floating ambiguity; LAMBDA [Least-squares AMBiguity Decorrelation Adjustment] method
• G01S 19/25 - Acquisition or tracking of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS

Abstract

A method of acquiring and repatriating satellite data representative of a zone in space, termed the target zone, and an instrument for acquiring and repatriating satellite data including a plurality of satellites (1, 100), a plurality of terrestrial receiving stations (50, 51, 52, 53, 54), the instrument includes, for each item of data received by a receiving station (50, 51, 52, 53, 54), termed the receiving station, originating from the space layer: elements for determining a receiving station (50, 51, 52, 53, 54) intended for storing this item of data, termed the receiving station competent in respect of this item of data, and a terrestrial digital network for routing this item of data from the station receiving this item of data to the receiving station competent in respect of this item of data.

IPC Classes  ?

• H04B 7/185 - Space-based or airborne stations

Abstract

A method for optimizing an acquisition phase of a spread-spectrum signal by a mobile receiver includes searching for a trend path having the maximum energy for different frequency assumptions and among all the positive trend paths of frequencies between initial and final instants marking the beginning and the end of a coherent signal integration.

IPC Classes  ?

• H04B 1/69 - Spread spectrum techniques

Abstract

A method for the acquisition of a radionavigation signal carrying a spreading code with a quasi-infinite period, where the signal is sampled in baseband on a delay line and correlated with a local spreading code replica, the sampled signal is shifted on the delay line from one correlation to the other, where in order to correlate the signal with the local replica of the code, a plurality of sequences of the spreading code are generated, the code sequences being of the same duration, equal to the duration of the signal sampled on the delay line, and associated with the consecutive time ranges in the temporal alignment search space, where each of the code sequences is correlated with the signal sampled in a respective correlation operation, the correlation operations being executed in parallel for the different sequences of code.

IPC Classes  ?

• H04B 1/00 - TRANSMISSION - Details of transmission systems not characterised by the medium used for transmission
• G01S 19/30 - Acquisition or tracking of signals transmitted by the system code related
• H04B 1/708 - Parallel implementation

Abstract

The invention relates, in particular, to a system for transmitting at least one electric pulse for an apparatus for determining a distribution of charges contained in the thickness of an item (2) made of a dielectric material, said transmission system including a transmitter electrode (1) for transmitting at least one pulse and a generator (3) of said pulse. The system is notable in that said electrode is formed by a transmission line (1) which is substantially level in relation to the item (2) to be analyzed and which includes impedance matching means to keep said impedance substantially constant along said transmission line in the passband of said pulse.

IPC Classes  ?

• H03H 7/38 - Impedance-matching networks

Abstract

The invention relates to a device for preventing the establishment of an electric arc between two adjacent parts, which have no electrical insulation, of at least two electrically conductive elements, comprising at least one piece made of a dielectric material, said device having at least one through-opening for receiving at least one of said at least two electrically conductive elements so as to surround at least one of said at least two adjacent parts, which have no electrical insulation, of said at least two electrically conductive elements.

IPC Classes  ?

• H01R 13/53 - Bases or cases for heavy duty; Bases or cases with means for preventing corona or arcing

Abstract

The invention concerns a device for preventing the establishment of an electric arc between adjacent portions (9) having no electrical insulation of at least two electrically conductive elements (7). According to the invention, the device comprises at least one separating partition (13) made of dielectric material inserted between said adjacent portions (9) of said conductive elements (7), the dimensions of said separating partition (13) being adapted so that the shortest path between said adjacent portions (9), by bypassing said separating partition (13), corresponds to an instability threshold for an electric arc that is likely to be established between said adjacent portions.

IPC Classes  ?

• H01B 3/12 - Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances ceramics
• H01B 17/00 - Insulators or insulating bodies characterised by their form
• H01R 13/53 - Bases or cases for heavy duty; Bases or cases with means for preventing corona or arcing

Abstract

A network distributes input microwave signals into a output signals having a Gaussian amplitude and in-phase distribution per the input signal. The network includes N input ports providing N different input signals; M output ports, M being a multiple of N; and layers disposed between the inputs ports and the outputs ports. The input signals are distributed through the layers. Each layer includes an arrangement of power combiners and/or power dividers. The arrangement has an angular rotational configuration of k2π/N radians around a symmetry symmetrical axis of a closed polygonal shape formed by the input ports, where k is an integer between 1 and N.

IPC Classes  ?

• H01Q 3/00 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system

Abstract

B.

IPC Classes  ?

• H04B 1/00 - TRANSMISSION - Details of transmission systems not characterised by the medium used for transmission

Abstract

The disclosure relates to a Hall-effect ion ejection device that comprises a longitudinal axis substantially parallel to the ion ejection direction, and comprises at least: a main ionization and acceleration annular channel, the annular channel being open at its end; an anode extending inside the channel; a cathode extending outside the channel at the outlet thereof; a magnetic circuit for generating a magnetic field in a portion of the annular channel, said circuit including at least an annular inner wall, an annular outer wall and a bottom connecting the inner and outer annular walls and defining the downstream portion of the magnetic circuit; characterized in that the magnetic circuit is arranged so as to create at the outlet of the annular channel a magnetic field independent from the azimuth.

IPC Classes  ?

• H01J 27/02 - Ion sources; Ion guns