| Patents for H04L 27 - Modulated-carrier systems (89,721) |
|---|
| 03/19/1980 | EP0008976A1 Digital F.S.K. modulator |
| 03/18/1980 | US4194153 Digital radio paging communication system |
| 03/11/1980 | US4193034 Radio receiver for FSK signals |
| 03/11/1980 | US4193033 Quadrature transposition stage |
| 03/05/1980 | EP0008521A2 High speed modem suitable for operating with a switched network |
| 03/05/1980 | EP0008491A1 Digital demodulator for phase shift keyed signals |
| 03/04/1980 | CA1073061A1 Split-ring digital phase modulator |
| 02/26/1980 | US4190802 Digital demodulator for phase shift keyed signals |
| 02/20/1980 | EP0008160A1 Programmable digital tone detector |
| 02/12/1980 | US4188583 Sampling method and apparatuses |
| 02/12/1980 | US4188503 Digital data communications system |
| 02/12/1980 | CA1071779A1 Multi-channel multiplex data transmission system |
| 02/12/1980 | CA1071719A1 Partial response modulation system |
| 02/12/1980 | CA1071718A1 Carrier regeneration circuit |
| 02/06/1980 | EP0007726A1 Digital apparatus approximating multiplication of analog signal by sine wave signal and method |
| 02/05/1980 | US4187403 Voice-protected, frequency-selective signal receiver |
| 01/29/1980 | US4186348 Receiver for data transmitted by means of the interleaved binary phase shift keyed modulation technique |
| 01/29/1980 | CA1070840A1 Cross-correlation arrangement |
| 01/29/1980 | CA1070838A1 Digital multitone generator for telephone dialing |
| 01/23/1980 | EP0007276A1 Demodulation device for frequency shift keyed signals |
| 01/23/1980 | EP0007209A1 Demodulator Arrangement for Diphase Digitally Modulated Signals |
| 01/22/1980 | US4185246 Circuit for reducing transients by precharging capacitors |
| 01/15/1980 | US4184116 Communication system having analog-to-digital-to-analog conversion means |
| 01/15/1980 | US4184045 System and method for transmission of information |
| 01/15/1980 | CA1070022A1 Digital demodulator |
| 01/15/1980 | CA1069980A1 Phase synchronizing circuit |
| 01/10/1980 | WO1980000051A1 Surface acoustic wave unique word detector and coherent demodulator |
| 01/09/1980 | EP0006496A1 Method for clock signal recovery |
| 01/09/1980 | EP0006121A1 Method and arrangement for initiating an adaptive equalizer starting from an unknown data signal in a transmission system utilizing quadrature amplitude modulation |
| 01/08/1980 | US4182988 PCM channel monitoring system for detecting errors using single parity bit |
| 01/08/1980 | CA1069606A1 Foreground subject-identifying apparatus |
| 01/08/1980 | CA1069588A1 Vestigial-sideband transmission system for synchronous data signals |
| 01/01/1980 | US4181967 Digital apparatus approximating multiplication of analog signal by sine wave signal and method |
| 01/01/1980 | US4181888 Feedback nonlinear equalization of modulated data signals |
| 12/25/1979 | US4180793 PSK pulse synthesizer |
| 12/25/1979 | US4180779 QPSK Demodulator with two-step quadrupler and/or time-multiplexing quadrupling |
| 12/25/1979 | US4180705 Arrangement for the automatic resynchronization of a data transmission receiver |
| 12/18/1979 | US4179672 Phase modulation system for combining carrier wave segments containing selected phase transitions |
| 12/18/1979 | US4179660 Method and device for transmitting pulse-duration modulated signals using two oscillators |
| 12/18/1979 | US4179586 System of encoded speech transmission and reception |
| 12/18/1979 | CA1068410A1 Error correction code and apparatus for the correction of differentially encoded quadrature phase shift keyed data (dqpsk) |
| 12/18/1979 | CA1068349A1 Fsk transmitter having frequency band-limitation |
| 12/12/1979 | EP0005735A1 Phase modulation circuit |
| 12/11/1979 | CA1068007A1 Automatic terminal data rate selection |
| 12/04/1979 | CA1067587A1 Multi-phase psk demodulator |
| 11/27/1979 | US4176328 DC coupled bi-phase modulator |
| 11/27/1979 | CA1067152A1 Digital timing recovery |
| 11/20/1979 | CA1066782A1 Receiver for synchronous signals with double phase-locked loop |
| 11/20/1979 | CA1066779A1 Spread spectrum demodulator |
| 11/13/1979 | US4174505 Directional PSK modulation and demodulation system |
| 11/13/1979 | US4174489 Phase discriminator in a receiver for a data transmission system |
| 11/13/1979 | CA1066371A1 Demodulator for frequency-shift keying system |
| 10/30/1979 | CA1065419A1 Digital detection system for differential phase shift keyed signals |
| 10/23/1979 | CA1065020A1 High reliability diversity communications system |
| 10/17/1979 | EP0004822A1 Method and apparatus for demodulating a differential phase shift keying signal |
| 10/09/1979 | US4170764 Amplitude and frequency modulation system |
| 10/09/1979 | US4170758 Process and device for the nonlinear equalization of digital signals |
| 10/09/1979 | CA1064111A1 Digital click removal and squelch control circuit for an fm receiver |
| 10/04/1979 | WO1979000718A1 Amplitude and frequency modulation system |
| 10/02/1979 | CA1063677A1 Spread spectrum demodulator |
| 09/25/1979 | US4169286 Surface acoustic wave unique word detector and coherent demodulator |
| 09/25/1979 | US4169246 Digital carrier correction circuit |
| 09/25/1979 | CA1063247A1 Digital automatic gain control circuit |
| 09/25/1979 | CA1063186A1 Recursive detector-oscillator circuit |
| 09/25/1979 | CA1063178A1 Modulation and filtering device |
| 09/19/1979 | EP0004046A1 Apparatus for amplitude and frequency modulating a signal |
| 09/18/1979 | US4168470 Two-bit A/D conversion apparatus without a signal derived automatic gain control |
| 09/18/1979 | US4168397 8-Phase PSK modulator |
| 09/05/1979 | EP0003943A2 Method and device to determine the initial clock phase in a synchronous data receiver |
| 09/04/1979 | US4166980 Method and apparatus for signal recognition |
| 09/04/1979 | US4166923 Amplitude- and periodic phase-modulation transmission system |
| 08/21/1979 | US4165488 Derangement detector in a receiver of a system for data transmission by means of phase modulation of a carrier |
| 08/21/1979 | CA1061005A1 Data communications |
| 08/14/1979 | CA1060554A1 Data transmission with dual psk modulation |
| 08/08/1979 | EP0003308A1 Correction circuit for frequency errors in data transmission |
| 07/24/1979 | CA1059221A1 Digital device for generating a filtered wave phase modulated by a data signal |
| 07/17/1979 | CA1058758A1 Digital frequency shift key modulator |
| 07/03/1979 | US4160121 Frequency shift keyed tone generator |
| 07/03/1979 | CA1057858A1 Apparatus for synthesizing phase-modulated carrier wave |
| 07/03/1979 | CA1057857A1 Digital demodulator for phase-modulated waveforms |
| 06/26/1979 | US4159527 Wave generator |
| 06/26/1979 | CA1057406A1 Method and device for synchronizing the receiver clock in a data transmission system |
| 06/26/1979 | CA1057358A1 Method for receiving unique word |
| 06/26/1979 | CA1057356A1 Digital communications system with immunity to frequency selective fading |
| 06/12/1979 | US4158174 Circuit arrangement for the production of a control signal in a receiving channel which is subject to interference |
| 06/12/1979 | US4158105 Clock extraction device for double-binary phase-shift keying system |
| 05/22/1979 | US4156229 Bit identification system for borehole acoustical telemetry system |
| 05/22/1979 | US4156194 Frequency-shift-keyed receiver |
| 05/01/1979 | CA1053583A1 Data transmission systems |
| 04/24/1979 | US4151491 Technique for supplying reference for an adaptive equalizer when multiple phase signals are transmitted |
| 04/24/1979 | US4151475 Compensation circuit for multi-path propagation distortion in binary frequency modulated signals |
| 04/24/1979 | CA1053389A1 Mfc receiver digital signal processing |
| 04/17/1979 | CA1052872A1 Frequency shift keyed tone generator |
| 04/10/1979 | US4149121 Four phase to two phase correlator |
| 04/10/1979 | CA1052451A1 Demodulator for differential phase modulated trains_ |
| 04/03/1979 | CA1051983A1 Automatic frequency corrector in differential phase modulation__ |
| 03/27/1979 | US4146841 Technique for combatting jitter in multiple phase transmission system |
| 03/27/1979 | CA1051347A1 Signal repeater for power line access data system |
| 03/20/1979 | US4145663 Digital synchronous detectors using time division for extracting carrier wave and demodulated signals |
| 03/20/1979 | US4145580 Multi-frequency signal receiver |