Patents
Sitemap › H04 - Electric communication technique › H04J - Multiplex communication › H04J 1 - Frequency-division multiplex systems
Patents for H04J 1 - Frequency-division multiplex systems (15,293)
09/1984
09/12/1984EP0118357A1 Electronic antenna array for a cellular radio telephone network with fixed base stations, and with mobile and portable units
09/11/1984CA1174384A1 Digital transmultiplexer
08/1984
08/14/1984US4466000 Data communication system
07/1984
07/31/1984USRE31639 Bidirectional unicable switching system
07/17/1984US4460250 Acousto-optical channelized processor
06/1984
06/27/1984EP0112039A2 Microwave transmitter and communications system
06/26/1984CA1169982A2 Signalling and channel loop test circuit for station carrier telephone system
06/19/1984US4455649 Method and apparatus for efficient statistical multiplexing of voice and data signals
06/13/1984EP0110691A2 System and method for controlling a multiple access data communications system
05/1984
05/29/1984CA1168389A1 Analogue/digital telecommunications subscriber station
05/24/1984WO1984002044A1 Microwave communications system
05/15/1984US4449218 Analog/digital telecommunication subscriber station
03/1984
03/20/1984US4438511 Packetized ensemble modem
03/06/1984US4435804 Sub-signal transmitting system
02/1984
02/28/1984CA1163025A1 Service integrated digital transmission system
02/14/1984US4432079 Synchronous/asynchronous independent single sideband acoustic telemetry
02/14/1984US4431875 Signalling and channel loop test circuits for station carrier telephone system
01/1984
01/17/1984CA1160771A1 Service integrated, digital transmission system
01/17/1984CA1160770A1 Service integrated digital transmission system operating in time multiplex
01/17/1984CA1160769A1 Service integrated digital signal transmission system
01/17/1984CA1160768A1 Service integrated digital transmission system
01/10/1984US4425661 Data under voice communications system
01/10/1984US4425642 Simultaneous transmission of two information signals within a band-limited communications channel
01/03/1984CA1159972A1 2-wire frequency division multiplex system
12/1983
12/13/1983US4420842 Fiber optic digital data transmitting system
12/13/1983CA1158789A1 Filters comprising reactive components, and a method of determining impedances thereof
11/1983
11/09/1983EP0093651A1 Multiple-carrier receiver protected against jamming
10/1983
10/25/1983US4412325 Equipment for single band multiplexing through digital processing
09/1983
09/21/1983EP0089159A1 Timed token ring with multiple priorities
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
09/15/1983WO1983003180A1 Timed token ring with multiple priorities
09/13/1983US4404557 Timed token ring with multiple priorities
08/1983
08/30/1983US4402076 Two wire F.D. multiplex system
07/1983
07/27/1983EP0084462A2 A method of generating carrier frequency, pilot frequency and local signals for a multichannel carrier frequency system and a carrier frequency network
07/27/1983EP0084125A2 Apparatus for efficient statistical multiplexing of voice and data signals
07/21/1983WO1983002533A1 Simultaneous transmission of two information signals within a band-limited communications channel
07/12/1983US4393273 FM-Receiver with transmitter characterization
07/05/1983US4392225 Telephone carrier system repeater and power supply
06/1983
06/28/1983USRE31295 Carrier supply for frequency division multiplexed systems
06/23/1983WO1983002206A1 A distributed control communications system
06/14/1983US4388493 In-band signaling system for FM transmission systems
05/1983
05/24/1983US4385381 Digital radio transmission system for transmitting a plurality of information signals by a network of transmitters having substantially the same carrier frequencies
05/24/1983US4385378 High power multiplexer for dual polarized frequency reuse earth stations
05/17/1983CA1146679A1 Device for supervising a transmultiplexer
05/10/1983CA1146287A1 Carrier frequency spectrum generator using logic level input pulses
03/1983
03/29/1983CA1143877A1 Signalling and channel loop test circuits for station carrier telephone system
03/29/1983CA1143796A1 Reduced-cross talk telemetry system and method of manufacture thereof
03/16/1983EP0074054A1 Data under voice communications system
02/1983
02/23/1983EP0072399A2 Digital transmultiplexer
02/15/1983CA1141491A1 Switching of channels between two premodulation systems
01/1983
01/11/1983CA1139467A1 Transmission system of frequency division multiplex signals on digital links
12/1982
12/14/1982CA1137661A1 Carrier frequency sound transmission system
12/01/1982EP0065648A1 Method for frequency scrambling sub-bands
12/01/1982EP0065636A1 Method of scrambling n sub-bands
09/1982
09/14/1982US4349903 Switching of channels between two premodulation systems
08/1982
08/17/1982US4345334 Reduced-cross talk telemetry system and method of manufacture thereof
07/1982
07/13/1982US4339816 Conferencing apparatus and methods for a frequency division multiplex communications system
07/07/1982EP0055293A1 Communication system for providing non-interfering multiple signals over individual common carrier channels
06/1982
06/29/1982CA1126885A1 Amplitude modulated telephone carrier system and terminal equipment therefor
06/16/1982EP0053674A1 Service integrated digital transmission system
06/16/1982EP0053673A1 Service integrated digital transmission system
06/15/1982US4335464 Dual multipoint data transmission system modem
06/10/1982WO1982001970A1 In-band signaling system for fm transmission systems
06/09/1982EP0053239A1 Service-integrated digital time-division multiplex transmission system
06/09/1982EP0053238A1 Service-integrated digital transmission system
06/09/1982EP0053236A1 Service-integrated digital transmission system
05/1982
05/25/1982CA1124331A1 Satellite communication system for speech and telegraphy
05/05/1982EP0050748A1 Analog-/digital subscriber's station
05/04/1982US4328579 Voice band multiplex transmission system
04/1982
04/27/1982CA1122731A1 Method for interconnecting channels between pre-modulating and a pre-group-modulating system
04/20/1982US4326288 Method and apparatus for frequency division multiplex system
03/1982
03/23/1982CA1120593A1 Methods of generating electric signals and apparatus therefor
03/16/1982US4320366 Carrier frequency communication transmission system having premodulation
03/03/1982EP0046741A2 High power multiplexer for dual polarized frequency reuse earth stations
03/02/1982US4318046 Digital frequency divider
02/1982
02/23/1982US4317194 Carrier frequency spectrum generator using logic level input pulses
02/16/1982US4316282 Multichannel frequency translation of sampled waveforms by decimation and interpolation
01/1982
01/19/1982US4312064 Modified vestigial side band transmission system
01/19/1982US4312062 System for digitally converting baseband channel signals into a frequency-division multiplex signal and vice versa
01/07/1982WO1982000074A1 Communication system for providing non-interfering multiple signals over individual common carrier channels
01/05/1982CA1115864A2 Ssb-fdm communication system derived from a complex band-pass digital filter bank
12/1981
12/15/1981US4306190 Plural frequency signal generator
12/08/1981CA1114081A2 Ssb-fdm communication system derived from a complex band-pass digital filter bank
12/01/1981US4304000 Device for supervising a transmultiplexer
12/01/1981CA1113618A1 Fdm/tdm transmultiplexer
11/1981
11/25/1981EP0040341A1 Two-wire frequency division multiplex system
09/1981
09/29/1981CA1109973A1 Arrangement for converting discrete signals into a discrete single-sideband frequency division-multiplex- signal and vice-versa
09/08/1981US4288868 Satellite communication system for speech and telegraphy
07/1981
07/28/1981US4281408 Digital signal processing arrangement for controlling the level of a frequency-division multiplex signal
07/08/1981EP0031458A2 Light-wave guide frequency multiplex transmission system
06/1981
06/30/1981EP0023223A4 Modified vestigial side band transmission system.
06/09/1981US4272843 System for transmitting service communications
05/1981
05/12/1981US4267590 Fiber-optical data-communication system using carriers of different wavelengths
04/1981
04/14/1981US4262355 System for limiting intermodulation distortion of talkspurt signals
03/1981
03/24/1981US4258435 Manifold multiplexers
02/1981
02/24/1981US4252999 Signaling and ranging technique for a TDMA satellite communication system
02/04/1981EP0023223A1 Modified vestigial side band transmission system
12/1980
12/23/1980US4241443 Apparatus for reducing a sampling frequency
12/16/1980US4240155 Diplexer and multiplexer
12/09/1980US4238849 Method of and system for transmitting two different messages on a carrier wave over a single transmission channel of predetermined bandwidth
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