|
H04J 1/00
|
Frequency-division multiplex systems |
|
H04J 1/02
|
Frequency-division multiplex systems - Details |
|
H04J 1/04
|
Frequency-transposition arrangements |
|
H04J 1/05
|
Frequency-transposition arrangements using digital techniques |
|
H04J 1/06
|
Arrangements for supplying the carrier waves |
|
H04J 1/08
|
Arrangements for combining channels |
|
H04J 1/10
|
Intermediate station arrangements, e.g. for branching, for tapping-off |
|
H04J 1/12
|
Arrangements for reducing cross-talk between channels |
|
H04J 1/14
|
Arrangements providing for calling or supervisory signals |
|
H04J 1/16
|
Monitoring arrangements |
|
H04J 1/18
|
Frequency-division multiplex systems in which all the carriers are amplitude-modulated |
|
H04J 1/20
|
Frequency-division multiplex systems in which at least one carrier is angle-modulated |
|
H04J 3/00
|
Time-division multiplex systems |
|
H04J 3/02
|
Time-division multiplex systems - Details |
|
H04J 3/04
|
Distributors combined with modulators or demodulators |
|
H04J 3/06
|
Synchronising arrangements |
|
H04J 3/07
|
Synchronising arrangements using pulse stuffing for systems with different or fluctuating information rates |
|
H04J 3/08
|
Intermediate station arrangements, e.g. for branching, for tapping-off |
|
H04J 3/10
|
Arrangements for reducing cross-talk between channels |
|
H04J 3/12
|
Arrangements providing for calling or supervisory signals |
|
H04J 3/14
|
Monitoring arrangements |
|
H04J 3/16
|
Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted |
|
H04J 3/17
|
Time-division multiplex systems in which the transmission channel allotted to a first user may be taken away and re-allotted to a second user if the first user becomes inactive, e.g. TASI |
|
H04J 3/18
|
Time-division multiplex systems using frequency compression and subsequent expansion of the individual signals |
|
H04J 3/20
|
Time-division multiplex systems using resonant transfer |
|
H04J 3/22
|
Time-division multiplex systems in which the sources have different rates or codes |
|
H04J 3/24
|
Time-division multiplex systems in which the allocation is indicated by an address |
|
H04J 3/26
|
Time-division multiplex systems in which the allocation is indicated by an address in which the information and the address are simultaneously transmitted |
|
H04J 4/00
|
Combined time-division and frequency-division multiplex systems |
|
H04J 7/00
|
Multiplex systems in which the amplitudes or durations of the signals in individual channels are characteristic of those channels |
|
H04J 7/02
|
Multiplex systems in which the amplitudes or durations of the signals in individual channels are characteristic of those channels in which the polarity of the amplitude is characteristic |
|
H04J 9/00
|
Multiplex systems in which each channel is represented by a different type of modulation of the carrier |
|
H04J 11/00
|
Orthogonal multiplex systems |
|
H04J 13/00
|
Code division multiplex systems |
|
H04J 13/10
|
Code generation |
|
H04J 13/12
|
Generation of orthogonal codes |
|
H04J 13/14
|
Generation of codes with a zero correlation zone |
|
H04J 13/16
|
Code allocation |
|
H04J 13/18
|
Allocation of orthogonal codes |
|
H04J 13/20
|
Allocation of orthogonal codes having an orthogonal variable spreading factor [OVSF] |
|
H04J 13/22
|
Allocation of codes with a zero correlation zone |
|
H04J 14/00
|
Optical multiplex systems |
|
H04J 14/02
|
Wavelength-division multiplex systems |
|
H04J 14/04
|
Mode multiplex systems |
|
H04J 14/06
|
Polarisation multiplex systems |
|
H04J 14/08
|
Time-division multiplex systems |
|
H04J 99/00
|
Subject matter not provided for in other groups of this subclass |
