Patents
Sitemap › H04 - Electric communication technique › H04J - Multiplex communication › H04J 4 - Combined time-division and frequency-division multiplex systems
Patents for H04J 4 - Combined time-division and frequency-division multiplex systems (1,442)
03/1994
03/01/1994US5291475 Slot hopped FD/TD/CDMA
02/1994
02/27/1994CA2100043A1 Digital block processor for transmitting a plurality of channels in a wireless radiotelephony system
12/1993
12/28/1993US5274627 Non-regenerative multibeam satellite communications system with FDMA access and SSTDM connectivity
12/21/1993CA2005507C Multiple control slot tdm/fdm communication system
12/15/1993EP0573541A1 System for broadcasting and receiving digital data, receiver and transmitter for use in such system.
10/1993
10/14/1993WO1993020628A1 Slot hopped fd/td/cdma
08/1993
08/18/1993EP0555304A1 Multichannel operation of rds
08/04/1993EP0470072A4 Distributed intelligence network using time and frequency multiplexing
07/1993
07/06/1993US5226038 Method for converting and method for processing electronic multiplex signals, and apparatus for processing such signals
06/1993
06/30/1993EP0549451A1 Frequency multiplex apparatus employing digital filters
06/23/1993CN1021396C Local area network communication system
06/16/1993EP0546720A1 Reduced interference through offset frequency partioning in cellular communication systems
06/15/1993US5220557 Multiple use digital transmitter/transceiver with time multiplexing
05/1993
05/11/1993US5210771 Multiple user spread-spectrum communication system
05/11/1993US5210752 Radio tele-communication system using multichannel access scheme
05/04/1993US5208691 Wavelength-time-space division switching system
04/1993
04/20/1993US5204978 Frequency setting method for radio transmission apparatus
04/20/1993US5204856 Skywave adaptable network transceiver apparatus using predictive frequencies for initial link-up
03/1993
03/31/1993EP0534255A2 Multiple use digital transmitter/transceiver with time multiplexing
03/03/1993CN1069610A Multipleuser spread spectrum communication system
02/1993
02/02/1993WO1993003558A1 A multiple user spread-spectrum communication system
09/1992
09/23/1992EP0504377A1 Frequency agile tdma communications system
08/1992
08/29/1992WO1992016063A1 System for broadcasting and receiving digital data, receiver and transmitter for use in such system
07/1992
07/30/1992DE4119587C1 Multichannel transmission system with command transmitter(s) - sending communication telegram in repeated sequential time slots
07/28/1992US5134615 Frequency agile tdma communications system
06/1992
06/09/1992US5121391 Subscriber RF telephone system for providing multiple speech and/or data singals simultaneously over either a single or a plurality of RF channels
06/02/1992US5119375 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
05/1992
05/14/1992WO1992008303A1 Multichannel operation of rds
04/1992
04/06/1992WO1992006546A1 Frequency agile tdma communications system
04/03/1992WO1992006545A1 Multiple carrier demodulator
04/03/1992CA2070167A1 Multicarrier demodulator
02/1992
02/12/1992EP0470072A1 Distributed intelligence network using time and frequency multiplexing
01/1992
01/29/1992EP0468569A2 A method of operating a communications system, a communications system and a secondary station for use in the system
01/02/1992EP0463634A2 Wavelength-time-space division switching system
12/1991
12/31/1991US5077727 Broadband information communications network system with coherent optical data transmission lines
10/1991
10/22/1991CA1291279C Filter bank
10/16/1991EP0451564A2 Time-division multiplex communication method with rotating transmission signal
08/1991
08/21/1991EP0441828A1 Method for converting and method for processing electronic multiplex signals, and apparatus for processing such signals
08/07/1991CN1013467B Operating method of wideband/multislot switching apparatus
08/06/1991US5038344 FDM-TDM transforming device
08/06/1991US5038342 TDM/FDM communication system supporting both TDM and FDM-only communication units
06/1991
06/18/1991US5025442 TDM/FDM communication system with pseudo-duplex capability
06/04/1991US5022024 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
02/1991
02/12/1991CA1280228C Digital radio transmission system
12/1990
12/27/1990EP0404596A2 Frequency setting method and apparatus for radio transmission apparatus
12/05/1990EP0400959A2 Broadband information communications network system with coherent optical data transmission lines
11/1990
11/15/1990WO1990013956A1 Distributed intelligence network using time and frequency multiplexing
10/1990
10/30/1990US4967407 Continuous transmission mode radio with control information monitoring capability
09/1990
09/12/1990CN1045318A Local area network communication system
09/05/1990EP0385695A2 Communication system
08/1990
08/31/1990CA2009713A1 Local area network communication system
07/1990
07/26/1990WO1990008434A1 Multiple control slot tdm/fdm communication system
07/25/1990CN1008962B Subscriber rf telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of rf channels
07/17/1990US4942570 Multiple control slot TDM/FDM communication system
05/1990
05/17/1990WO1990005417A1 Method for converting and method for processing electronic multiplex signals, and apparatus for processing such signals
05/16/1990EP0367932A2 Filter bank for the frequency division multiplexing or demultiplexing of channel signals
05/02/1990EP0365785A2 Filter bank for the frequency division multiplexing or demultiplexing of channel signals
05/01/1990US4922536 Digital audio transmission for use in studio, stage or field applications
05/01/1990US4922483 Multi-channel PCM music broadcasting system
03/1990
03/27/1990US4912705 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
03/21/1990EP0359205A2 Optical communication system for simultaneous transmission of a baseband digital signal and multiple microwave subcarriers
02/1990
02/15/1990DE3837841C1 Filter bank for the frequency-division multiplexing or frequency-division demultiplexing of channel signals
01/1990
01/23/1990US4896320 Filter bank for frequency demultiplexing in multiple channels
12/1989
12/07/1989DE3836081C1 Filter bank for frequency multiplexing or frequency demultiplexing of channel signals
06/1989
06/27/1989CA1256606A1 Information communication system
06/01/1989WO1989005071A1 Apparatus and method for converting a frequency division multiplex to a time division multiplex
05/1989
05/31/1989EP0318334A1 Apparatus and method for converting a frequency division multiplex to a time division multiplex
04/1989
04/18/1989CA1252923A1 Fdm-tdm transmultiplexing system
03/1989
03/28/1989US4817089 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
03/14/1989US4813035 Transmultiplexer virtual group distribution frame
03/08/1989EP0305771A2 Digital transmission system with a switching transmultiplexer
02/1989
02/28/1989CA1250673A1 Subscriber rf telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of rf channels
01/1989
01/17/1989US4799252 Digital radio transmission system
11/1988
11/17/1988EP0290790A2 Filter bank
09/1988
09/07/1988CN88100917A Wideband/multislot switching apparatus
07/1988
07/19/1988US4759013 FDM-TDM transmultiplexing system
06/1988
06/28/1988US4754449 For use in a telecommunications system
01/1988
01/12/1988US4719619 Synchronizer for communications processor
11/1987
11/03/1987US4704715 Information communication system
09/1987
09/29/1987US4697260 Method of and arrangement for transmitting messages in a digital radio transmission system
09/23/1987EP0238000A2 Regenerative and switching telecommunications transponder module with FDMA/TDM conversion functions
06/1987
06/23/1987US4675863 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
03/1987
03/18/1987EP0214649A2 FDM-TDM transmultiplexing system
02/1987
02/25/1987EP0211460A2 Digital radio transmission method
10/1986
10/21/1986CA1213017A1 Method for transmitting digital signals
10/15/1986CN86100949A Subscriber rf telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of rf channels
08/1986
08/13/1986CN85109677A Method of and arrangement for transmitting messages in a digital radio transmission system
07/1986
07/30/1986EP0188836A2 Method and device for information transmission in a digital radio transmission system
05/1986
05/13/1986US4589018 Technique for the time frequency multiplexing on three television signals
03/1986
03/25/1986US4578790 System and equipment for single side band multiplexing through digital processing
01/1986
01/02/1986EP0166595A2 Information communication system
04/1985
04/09/1985US4510598 Digital transmultiplexer
01/1985
01/29/1985CA1181876A1 Method and apparatus for efficient statistical multiplexing of voice and data signals
01/09/1985EP0130692A2 A technique for the time frequency multiplexing of three television signals
10/1984
10/16/1984CA1176317A1 Digital filter bank
09/1984
09/11/1984CA1174384A1 Digital transmultiplexer
06/1984
06/19/1984US4455649 Method and apparatus for efficient statistical multiplexing of voice and data signals
06/12/1984CA1169170A1 Digital subscriber communication system
10/1983
10/25/1983CA1155980A1 Pcm signal interface apparatus
09/1983
09/20/1983CA1154181A1 Digital radio transmission system for transmitting a plurality of information signals by a network of transmitters having substantially the same carrier frequencies
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