| Patents for H04J 1 - Frequency-division multiplex systems (15,293) |
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| 04/28/1993 | EP0296175B1 Method and installation for digital communication, particularly between and toward moving vehicles |
| 04/27/1993 | US5206886 Method and apparatus for correcting for clock and carrier frequency offset, and phase jitter in mulicarrier modems |
| 04/20/1993 | US5204893 Method and an apparatus for transmitting/receiving signals in a video phone |
| 03/31/1993 | EP0534255A2 Multiple use digital transmitter/transceiver with time multiplexing |
| 03/17/1993 | EP0531302A1 Cable television radio frequency subscriber data transmission apparatus and rf return method |
| 03/16/1993 | US5194829 Radio set with easily selected oscillator frequency |
| 03/16/1993 | CA1314638C Demand-assignment multiple access control system |
| 03/10/1993 | EP0531046A2 Multi-subcarrier modulation for HDTV transmission |
| 03/02/1993 | US5191459 Method and apparatus for transmitting broadband amplitude modulated radio frequency signals over optical links |
| 03/02/1993 | US5191457 Wdm optical communication wherein optical beams are modulated by channel discrimination signals of different frequencies by data signals |
| 03/02/1993 | CA1314079C Time shared very small aperture satellite terminals |
| 02/09/1993 | US5185591 Power distribution line communication system for and method of reducing effects of signal cancellation |
| 02/03/1993 | EP0525845A1 Multiplexing system for subchannels with different priority levels |
| 02/02/1993 | US5184084 Double band frequency converting system |
| 01/21/1993 | WO1993001660A1 Power distribution line communication system for reducing effects of signal cancellation |
| 01/21/1993 | DE4219357A1 Digitaler empfaenger fuer mehrere simulananwender und digitales empfangsverfahren Digital empfaenger for several simulananwender and digital reception method |
| 01/13/1993 | EP0521995A1 Transmission and reception in a hostile interference environment. |
| 01/12/1993 | US5179588 Improved page party system |
| 12/29/1992 | US5175882 Demodulation control arrangement in satelitte communications system using "scpc-dama" |
| 11/26/1992 | WO1992021195A1 Dual mode transmitter and receiver |
| 11/17/1992 | CA2066946A1 Apparatus and method for synchronizing a plurality of remote transmission and receiving stations |
| 11/14/1992 | CA2102914A1 Dual mode transmitter and receiver |
| 10/20/1992 | US5157530 Optical fiber system |
| 10/14/1992 | EP0507799A1 Method and apparatus for transmitting broadband amplitude modulated radio frequency signals over optical links |
| 09/22/1992 | US5150365 Communication system for coexistent base band and broad band signals |
| 09/16/1992 | CN1018317B Multiple use of fm band |
| 09/09/1992 | EP0502449A1 Frequency converter |
| 09/02/1992 | EP0501690A2 Apparatus for and method of digital signal processing |
| 08/18/1992 | CA1306499C Coherent detection loop distribution system |
| 07/29/1992 | EP0496675A1 Procedure and communication network on optical fibres with frequency division multiplex |
| 07/29/1992 | EP0496674A1 Procedure and communication network with frequency assignment |
| 07/29/1992 | EP0496673A1 Procedure and message transmission network in frequency channels |
| 07/25/1992 | CA2059970A1 Process and network for transmitting messages over frequency channels |
| 07/25/1992 | CA2059907A1 Frequency allocation communication process and network |
| 07/01/1992 | CN1017296B Ensemble modem structure for imperfect transmission media |
| 06/25/1992 | DE4041634A1 Digital frequency multiplex signal generation for TV signal transmission - using digital filter after A=D converter operating at same sampling rate as following filters for frequency division |
| 06/17/1992 | DE4116495C1 Multiplexer-demultiplexer for synthesising or analysing frequency multiplex signals in multi-carrier system - has common filter block and real and imaginary part blocks for inverse discrete fast Fourier transformation |
| 06/11/1992 | WO1992010039A1 Process and arrangement for compensating adjacent channel interference in a double sideband amplitude modulation system |
| 06/11/1992 | DE4038405A1 Verfahren und schaltungsanordnung zum aussieben des unteren einen oder des oberen anderen seitenbands einer auszuwertenden zweiseitenbandschwingung aus einem gemisch mehrerer sich gegenseitig stoerender zweiseitenbandschwingungen in fernmeldeanlagen, insbesondere in kurzwellen-vielkanal-funkfernsprechanlagen und in kurzwellen-rundfunkanlagen Method and circuit arrangement for sifting the lower one or the upper other side bands of the double-sideband oscillation from a mixture of several mutually thereâ double sideband harmonics in telecommunication systems, especially in short-wave much-channel radio remote intercom systems and short-wave broadcasting systems |
| 06/09/1992 | US5121409 Multichannel satellite communication and control system |
| 05/06/1992 | CN1016556B Ensemble modem structure for imperfect transmission media |
| 04/29/1992 | EP0481976A1 Intercom telephone |
| 04/15/1992 | CN1016306B Technique for reducing distortion characteristics in fiber-optic links |
| 03/18/1992 | EP0475509A1 Radio apparatus with an oscillator and a phase locked loop |
| 03/11/1992 | CN1059441A Duplex centerless frequency-division multiple access carrier telephone system |
| 02/26/1992 | EP0471968A2 Method of processing a digital frequency multiplexed signal and for decomposing it |
| 02/19/1992 | CN1058876A Cable television radio frequency subscriber data transmission apparatus and rf return method |
| 02/04/1992 | CA1295371C Data communication system having level control means |
| 01/22/1992 | EP0358688A4 Method for dynamically allocating data channels on a trunked communication system |
| 12/27/1991 | EP0155285B1 Audio channel stacking with speech compression for narrow band transmission with provision for dialed calls |
| 12/19/1991 | DE4017403C1 Frequency multiplexing transmission system for satellite - selects mixing frequency signals so that frequency bands overlap by one channel |
| 11/27/1991 | EP0458523A2 A method and apparatus for transmitting/receiving signals in a video phone |
| 11/21/1991 | EP0457602A2 Data security in multi-carrier communication systems |
| 11/14/1991 | WO1991017617A1 Speech-transmission system |
| 11/14/1991 | DE4014132A1 Sprachuebertragungssystem Sprachuebertragungssystem |
| 11/12/1991 | CA1292043C Method for dynamically allocating data channels on a trunked communication system |
| 11/05/1991 | US5063559 Optimized wavelength-division-multiplexed lightwave communication system |
| 10/23/1991 | EP0453203A2 Method and apparatus for correcting for clock and carrier frequency offset, and phase jitter in multicarrier modems |
| 10/22/1991 | CA1291279C Filter bank |
| 10/17/1991 | WO1991015925A1 Transmission and reception in a hostile interference environment |
| 10/15/1991 | US5058138 Modular receiver for signals having multiple channels and multiple formats |
| 10/15/1991 | US5058107 Efficient digital frequency division multiplexed signal receiver |
| 10/15/1991 | US5058102 Broadband optical communication system, particularly for the subscriber area |
| 10/15/1991 | US5056235 Signal transmission system for machine tools, inspection machines, and the like |
| 10/09/1991 | EP0224556B1 Ensemble modem structure for imperfect transmission media |
| 10/01/1991 | CA2078445A1 Method and apparatus for transmitting and receiving ofdm carriers |
| 10/01/1991 | CA1290081C Multicarrier demodulator |
| 09/25/1991 | EP0447752A2 WDM optical communication with optical beams modulated by channel discrimination signals |
| 09/24/1991 | US5051993 Mixed modulation level communication system |
| 09/21/1991 | WO1991015065A1 Cable television radio frequency subscriber data transmission apparatus and rf return method |
| 09/21/1991 | CA2078563A1 Cable television radio frequency subscriber data transmission apparatus and rf return method |
| 09/18/1991 | EP0446612A2 Method for the preparation of several television signals for transmission purposes and applications |
| 09/04/1991 | EP0444348A2 Optimized wavelength-division-multiplexed lightwave communication system |
| 07/30/1991 | CA1287152C Inter-network connection system |
| 07/24/1991 | EP0438022A2 Method for deskewing bits in a communication system using wavelength division multiplexing |
| 07/03/1991 | EP0435455A2 Varying bandwidth digital signal detector |
| 07/02/1991 | US5029158 Protection switching in a multi-channel communications system |
| 06/19/1991 | EP0433090A2 Demodulation control arrangement in satellite communications system using "SCPC-DAMA" |
| 06/05/1991 | WO1991008631A1 Method and apparatus for transmitting broadband amplitude modulated radio frequency signals over optical links |
| 05/14/1991 | US5016242 Microwave subcarrier generation for fiber optic systems |
| 04/30/1991 | US5012490 Varying bandwidth digital signal detector |
| 04/24/1991 | CA2001308A1 Short range multi-channel microwave transmitter |
| 04/18/1991 | WO1990011675A3 Mixed modulation level communication system |
| 04/16/1991 | CA1283195C Frequency-division multiplex broadband multimedia network |
| 04/02/1991 | US5005169 Frequency division multiplex guardband communication system for sending information over the guardbands |
| 03/19/1991 | CA1281821C Modular contiguous channel multiplexer |
| 02/26/1991 | US4996709 Intercom telephone |
| 02/19/1991 | US4995096 Demand-assignment multiple access control system |
| 02/19/1991 | US4995055 Time shared very small aperture satellite terminals |
| 02/12/1991 | US4992747 A signal receiving system |
| 02/06/1991 | EP0138988B1 Simultaneous transmission of speech and data over an analog channel |
| 01/30/1991 | CN1011461B Ensemble modem structure for imperfect transmission media |
| 01/23/1991 | CN1048776A Ensemble modem structure for imperfect transmission media |
| 01/23/1991 | CN1048775A Ensemble modem structure for imperfect transmission media |
| 01/23/1991 | CN1048774A Ensemble modem structure for imperfect transmission media |
| 12/27/1990 | EP0207091B1 Two-hop collocated satellite communications system |
| 10/23/1990 | CA1275513C Technique for repelling carriers in optical communications to minimize mutual interference |
| 10/18/1990 | WO1990011675A2 Mixed modulation level communication system |
| 10/10/1990 | CN1009986B Multi-stage transmitter aerial coupling device |
| 08/14/1990 | US4949170 Video information transmission service system and head end device therefor |