| Patents for H04J 4 - Combined time-division and frequency-division multiplex systems (1,442) |
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| 07/27/1983 | EP0084125A2 Apparatus for efficient statistical multiplexing of voice and data signals |
| 07/12/1983 | US4393456 Digital filter bank |
| 07/05/1983 | US4392234 PCM Signal interface apparatus |
| 06/28/1983 | US4390986 Digital subscriber communication system |
| 05/24/1983 | US4385381 Digital radio transmission system for transmitting a plurality of information signals by a network of transmitters having substantially the same carrier frequencies |
| 05/17/1983 | CA1146679A1 Device for supervising a transmultiplexer |
| 02/23/1983 | EP0072399A2 Digital transmultiplexer |
| 10/26/1982 | CA1134519A1 Transmitter and receiver for an orthogonally multiplexed qam signal of a sampling rate n times that of pam signals, comprising an n/2-point offset fourier transform processor |
| 07/20/1982 | CA1128133A2 Data communication system |
| 05/19/1982 | EP0051725A1 Transmission method for digital signals |
| 04/20/1982 | US4326288 Method and apparatus for frequency division multiplex system |
| 04/06/1982 | US4324000 Termination circuit for FDM/TDM processors |
| 03/30/1982 | CA1121075A1 Method and system for synchronizing a tdma communication network comprising a satellite equipped with several directional beam antennas transmitting signals at various frequencies |
| 02/23/1982 | CA1118920A1 Tdma intertransponder communication |
| 01/26/1982 | US4313194 Transmission system of frequency division multiplex signals on digital links |
| 01/19/1982 | US4312062 System for digitally converting baseband channel signals into a frequency-division multiplex signal and vice versa |
| 12/15/1981 | CA1114534A2 Arrangement for converting discrete signals in to a discrete single-sideband frequency division- multiplex-signal and vice-versa |
| 12/01/1981 | US4304000 Device for supervising a transmultiplexer |
| 12/01/1981 | CA1113618A1 Fdm/tdm transmultiplexer |
| 11/10/1981 | US4300229 Transmitter and receiver for an othogonally multiplexed QAM signal of a sampling rate N times that of PAM signals, comprising an N/2-point offset fourier transform processor |
| 10/29/1981 | WO1981003095A1 Digital subscriber communication system |
| 09/29/1981 | CA1109973A1 Arrangement for converting discrete signals into a discrete single-sideband frequency division-multiplex- signal and vice-versa |
| 04/14/1981 | US4262356 Method and system for synchronizing a TDMA communication network comprising a satellite equipped with several directional beam antennas transmitting signals at various frequencies |
| 12/23/1980 | US4241443 Apparatus for reducing a sampling frequency |
| 12/02/1980 | US4237551 Transmultiplexer |
| 11/25/1980 | CA1090492A1 Ssb-fdm communication system derived from a complex band-pass digital filter bank |
| 07/08/1980 | CA1081379A1 Telephone transmission system |
| 04/22/1980 | US4199660 FDM/TDM Transmultiplexer |
| 04/02/1980 | EP0009203A1 Method and circuit for digital audio/FDM or PCM/FDM transposition and vice versa |
| 04/02/1980 | EP0009096A1 Method and system for synchronising a time division multiple access communication network using a satellite having multiple spot beam antennas at different frequencies |
| 03/11/1980 | US4193031 Method of signal transmission and reception utilizing wideband signals |
| 05/17/1979 | WO1979000271A1 Fdm/tdm transmultiplexer |
| 02/06/1979 | US4138730 High speed FFT processor |
| 12/26/1978 | US4131766 Digital filter bank |
| 12/26/1978 | US4131764 Arrangement for converting discrete signals into a discrete single-sideband frequency division-multiplex-signal and vice versa |
| 09/26/1978 | US4117541 Configurable parallel arithmetic structure for recursive digital filtering |
| 08/15/1978 | US4107470 Digital SSB-FDM communication system derived from a complex band-pass digital filter bank and by a filter breakdown process |
| 07/25/1978 | US4103110 Telephone transmission system comprising digitally processing frequency multiplexor and demultiplexor |
| 02/21/1978 | US4075429 Transmultiplexer |
| 03/22/1977 | US4013842 Method and apparatus for interfacing digital and analog carrier systems |
| 03/22/1977 | US4013840 Tdm and fdm telephone communication |
| 02/15/1977 | US4008378 Multi-radix digital communications system with time-frequency and phase-shift multiplexing |