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)
09/1997
09/10/1997EP0643887A4 A multi-channel digital transmitter and receiver.
08/1997
08/21/1997DE19706085A1 Digital telecommunication system with transition from first to second carrier frequency
08/20/1997EP0754378A4 High speed bidirectional digital cable transmission system
08/20/1997CN1157508A TDMA communication system
08/12/1997US5657358 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or plurality of RF channels
08/12/1997US5657323 Method and apparatus for signal transmission in a communication system
07/1997
07/16/1997EP0783812A2 Method and apparatus for transmultiplexer a multi-channel information signal
06/1997
06/19/1997WO1997022189A1 Satellite direct radio broadcast system
06/18/1997EP0779726A2 Digital Communication Apparatus
06/17/1997US5640422 Digital communications modulation method and apparatus
06/04/1997EP0776582A2 Device at telecommunication systems
05/1997
05/09/1997WO1997006618A3 Method and apparatus for transmultiplexer a multi-channel information signal
04/1997
04/03/1997WO1997012466A1 Apparatus and method for digital information transfer
04/03/1997WO1997012465A1 Communications method and apparatus for digital information
04/03/1997WO1997012464A1 Digital communications modulation method and apparatus
04/02/1997EP0766419A2 Dynamically reconfigurable frequency division multiplexer and modulator
03/1997
03/04/1997US5608724 Electronic circuit
02/1997
02/20/1997WO1997006618A2 Method and apparatus for transmultiplexer a multi-channel information signal
02/20/1997CA2201376A1 Method and apparatus for transmultiplexing a multi-channel information signal
01/1997
01/23/1997WO1997002674A1 A wide-band application based upon a narrow-band tdma system
01/23/1997WO1997002673A1 Group modulator for a broadband communications system
01/22/1997EP0754378A1 High speed bidirectional digital cable transmission system
01/22/1997CN1140954A Wired television system and wired television central apparatus and terminal apparatus
01/08/1997EP0752765A2 A wide-band application based upon a narrow-band TMDA system
01/08/1997EP0573541B1 System for broadcasting and receiving digital data, receiver and transmitter for use in such system
12/1996
12/31/1996US5589967 Method and device for transmitting and switching packets in an optical network
12/27/1996EP0750424A2 A CATV communication system and a CATV center equipment and CATV terminal units
12/17/1996US5586122 Time division multiple access mobile wireless telecommunication system
12/17/1996US5585850 Adaptive distribution system for transmitting wideband video data over narrowband multichannel wireless communication system
11/1996
11/27/1996EP0744846A1 Method for managing radio resources during packet transmission and transmitter and receiver for realizing the procedure
11/24/1996CA2177122A1 Method for the management of radio resources during the transmission of packets
11/14/1996WO1996036135A1 Apparatus for multi-rate simulcast communications
10/1996
10/31/1996WO1996034349A1 An improved periodic wireless data broadcast
10/15/1996US5566168 TDMA/FDMA/CDMA hybrid radio access methods
09/1996
09/03/1996US5553064 High speed bidirectional digital cable transmission system
08/1996
08/27/1996US5550812 System for broadcasting and receiving digital data, receiver and transmitter for use in such system
08/14/1996CN1129048A Method for improving audibility of broadcast control channel
07/1996
07/23/1996US5539730 TDMA/FDMA/CDMA hybrid radio access methods
07/17/1996EP0722259A2 Channel scanning method for portable radio telephones
07/16/1996US5537398 Apparatus for multi-rate simulcast communications
07/11/1996WO1996021289A1 Portable handset for tdd/fdd wireless communication
07/03/1996EP0719492A1 Optical communications network
06/1996
06/11/1996CA2068430C Frequency agile tdma communications system
06/05/1996CN1124076A TDMA/FDMA/CDMA hybrid radio access methods
06/04/1996CA2092292C A multiple user spread-spectrum communication system
05/1996
05/30/1996WO1996007278A3 Device for sending short messages in telecommunication systems
05/22/1996EP0712556A1 Dynamic radio communications system
05/15/1996EP0711475A1 A method for improving the audibility of a broadcast control channel
05/09/1996WO1996013917A1 Adaptive video signal distribution system
03/1996
03/27/1996EP0454776B1 Multiple control slot tdm/fdm communication system
03/13/1996EP0701337A2 Mobile communication system using various multiple access methods
03/13/1996EP0700616A1 A frequency agile radio
03/07/1996WO1996007278A2 Device for sending short messages in telecommunication systems
02/1996
02/27/1996US5495483 Method and apparatus for allocating carrier channels
02/06/1996US5490137 Method of allocating a new frequency plan in a communication system
12/1995
12/12/1995US5475677 Compatible licensed and unlicensed band portable handset unit for TDMA wireless communications system
12/07/1995WO1995033313A1 A method for improving the audibility of a broadcast control channel
11/1995
11/21/1995US5469431 Method of and apparatus for channel mapping with relative service identification
11/08/1995EP0681377A2 Frequency hopping in digital cellular networks
11/07/1995US5465253 Method and apparatus for demand-assigned reduced-rate out-of-band signaling channel
11/02/1995EP0680168A2 System and method for optimizing spectral efficiency using time-frequency-code slicing
10/1995
10/12/1995WO1995027352A1 High speed bidirectional digital cable transmission system
10/11/1995EP0676105A1 Method and arrangement for dynamic allocation of multiple carrier-wave channels for multiple access by frequency division multiplexing
09/1995
09/19/1995US5452290 Look ahead channel switching transceiver
09/19/1995US5452115 Communications system
08/1995
08/08/1995US5440544 Integrated data link concept for air traffic control applications
07/1995
07/26/1995EP0664624A2 Method and device for transmission and switching of packets in an optical network
07/26/1995EP0664067A1 Method of and apparatus for channel mapping with relative service identification
07/13/1995WO1995019079A1 Tdma/fdma/cdma hybrid radio access methods
07/12/1995EP0662775A1 TDMA/FDMA/CDMA hybrid radio access methods
07/04/1995US5430761 Reduced interference through offset frequency partitioning
07/04/1995US5430713 Frequency hopping in digital cellular networks
07/04/1995US5430711 Group modulator
06/1995
06/27/1995US5428603 Synchronous time division multiple access interrogate-respond data communication network
06/27/1995US5428601 Method of operating a communications system, a communications system and a secondary station for use in the system
06/06/1995US5422952 Dynamic radio communications system
04/1995
04/20/1995DE4433793C1 Method for transmitting subscriber-individual services and distribution services
04/06/1995WO1995009496A1 Method for digital semi-duplex transmission
03/1995
03/23/1995WO1995008247A1 Optical communications network
03/22/1995EP0643887A1 A multi-channel digital transmitter and receiver
03/15/1995EP0643503A2 Synchronous time division multiple access interrogate-respond data communication network
03/07/1995US5396489 Method and means for transmultiplexing signals between signal terminals and radio frequency channels
02/1995
02/09/1995WO1995004415A1 Dynamic radio communications system
02/09/1995CA2167502A1 Dynamic radio communications system
01/1995
01/26/1995WO1995002942A1 Method of and apparatus for channel mapping with relative service identification
01/24/1995CA1334114C Apparatus and method for converting a frequency division multiplex to a time division multiplex
12/1994
12/06/1994CA2019592C Frequency setting method for radio transmission apparatus
11/1994
11/09/1994EP0623265A1 A method and means for transmultiplexing signals between signal terminals and radio frequency channels
10/1994
10/25/1994US5359595 Skywave adaptable network transceiver apparatus and method using a stable probe and traffic protocol
09/1994
09/15/1994WO1994021061A1 A multi-channel digital transmitter and receiver
08/1994
08/31/1994EP0613264A2 Group modulator
08/23/1994CA2045797C Wavelength-time-space division switching system
07/1994
07/12/1994US5329522 Space-division multiplex communication method of executing multiplex communication
06/1994
06/21/1994US5323391 Multi-channel digital transmitter and receiver
05/1994
05/26/1994WO1994011961A1 Method and arrangement for dynamic allocation of multiple carrier-wave channels for multiple access by frequency division multiplexing
04/1994
04/27/1994WO1994010772A1 A method and means for transmultiplexing signals between signal terminals and radio frequency channels
04/27/1994CA2117336A1 A method and means for transmultiplexing signals between signal terminals and radio frequency channels
03/1994
03/29/1994US5299192 Digital filter-type frequency demultiplexing device
03/22/1994US5297136 Multicarrier demodulator
03/02/1994EP0585089A2 Digital block processor for transmitting a plurality of channels in a wireless radiotelephony system
1 ... 3 4 5 6 7 8 9 10 11 12 13 14 15