| Patents for H04L 27 - Modulated-carrier systems (89,721) |
|---|
| 02/03/1982 | EP0045260A1 Demodulator for continuous-phase modulated signals, and transmission system involving such a demodulator |
| 02/02/1982 | US4314206 Noise chopper for preventing false locks in a coherent carrier recovery system |
| 01/26/1982 | US4313219 Receiver for high frequency electromagnetic oscillations having a frequency readjustment |
| 01/26/1982 | US4313205 Carrier synchronization and symbol synchronization for offset-QPSK burst communications |
| 01/26/1982 | US4313202 Modem circuitry |
| 01/26/1982 | US4313139 Carrier recovery circuit for a facsimile system |
| 01/26/1982 | US4313107 Tone signal detectors |
| 01/26/1982 | US4313103 Digital demodulator |
| 01/20/1982 | EP0044230A1 Method and arrangement for phase ambiguity resolution in a quadriphase modulation link |
| 01/19/1982 | US4312072 Radio frequency transmission system |
| 01/19/1982 | US4312062 System for digitally converting baseband channel signals into a frequency-division multiplex signal and vice versa |
| 01/19/1982 | US4311971 Apparatus for generating constant-envelope, angle-modulated pulse signals |
| 01/19/1982 | US4311964 Coherent phase shift keyed demodulator for power line communication systems |
| 01/19/1982 | CA1116698A1 Duplex transmitting-receiving station |
| 01/12/1982 | US4310803 Bandpass filter circuit |
| 01/12/1982 | CA1116258A1 Arrangement for the automatic resynchronization of a data transmission receiver |
| 01/12/1982 | CA1116240A1 System for data transmission by means of an angle-modulated carrier of constant amplitude |
| 01/05/1982 | US4309772 Soft quantizer for FM radio binary digital signaling |
| 01/05/1982 | US4309770 Method and device for training an adaptive equalizer by means of an unknown data signal in a transmission system using double sideband-quadrature carrier modulation |
| 01/05/1982 | US4309764 Technique for increasing the rain margin of a satellite communication system |
| 01/05/1982 | CA1115789A1 Phase shift keyed systems |
| 01/05/1982 | CA1115777A1 Method and device for acquiring the initial phase of the clock in a synchronous data receiver |
| 12/30/1981 | EP0042641A1 Frequency demodulator using a delay circuit, the delay of which varies according to the received frequency |
| 12/30/1981 | EP0042415A1 Apparatus for synthesizing a modulated carrier |
| 12/30/1981 | EP0042414A1 Receiver for phase-shift modulated carrier signals |
| 12/29/1981 | US4308508 Phase locked loop frequency modulator |
| 12/29/1981 | US4308505 Frequency detector device and method |
| 12/29/1981 | US4308503 Phase shift keyed demodulator using recovered carrier with controlled phase offset |
| 12/22/1981 | US4307465 Digital communications receiver |
| 12/22/1981 | US4307464 Method and apparatus for synthesizing a modulated carrier to reduced interchannel interference in a digital communication system |
| 12/15/1981 | US4306308 Symbols communication system |
| 12/10/1981 | WO1981003559A1 Voiceband data set |
| 12/08/1981 | US4305040 Phase detection system |
| 12/01/1981 | US4304004 Apparatus for transmission and reception of frequency modulated digital communication signals |
| 11/25/1981 | EP0040217A1 Apparatus for and method of processing data signals. |
| 11/24/1981 | US4302844 Carrier transmission through harmonic polluted medium |
| 11/24/1981 | US4302842 Digital radio repeater with regenerator |
| 11/24/1981 | US4302757 Bore telemetry channel of increased capacity |
| 11/24/1981 | US4302629 Digital data transmission system |
| 11/24/1981 | CA1113155A1 Duplex microwave radio system |
| 11/17/1981 | US4301445 Communication system and method having wide dynamic range digital gain control |
| 11/17/1981 | US4301417 Quadriphase differential demodulator |
| 11/11/1981 | EP0030551A4 A technique for increasing the rain margin of a communication system. |
| 11/10/1981 | US4300229 Transmitter and receiver for an othogonally multiplexed QAM signal of a sampling rate N times that of PAM signals, comprising an N/2-point offset fourier transform processor |
| 11/10/1981 | CA1112308A1 Frequency shift modulator |
| 11/10/1981 | CA1112304A1 Circuits for producing an output waveform synchronized with the timing of a given waveform |
| 11/03/1981 | US4298986 Receiver for phase-shift modulated carrier signals |
| 11/03/1981 | US4298985 Digital filter bank detector |
| 10/28/1981 | EP0038520A1 Frequency stabilisation method for a high-frequency freely oscillating oscillator |
| 10/27/1981 | US4297650 Phase locked loop carrier recovery circuit with false lock prevention |
| 10/27/1981 | US4297641 Serrodyning system employing an adjustable phase shifting circuit |
| 10/27/1981 | CA1111531A1 Digital signalling receiver for receiving pcm tones |
| 10/27/1981 | CA1111509A1 Charge coupled device filters and modems incorporating such filters |
| 10/20/1981 | US4296495 Device for measuring the quality of a digital radio link |
| 10/13/1981 | US4295222 Arrangement for restituting the clock for a receiver of data transmitted by phase modulation of a carrier |
| 10/13/1981 | CA1110769A1 Digital signal processing arrangement |
| 10/07/1981 | EP0037317A1 Process for the demodulation of an amplitude-modulated signal, demodulator for carrying out this process and television system comprising such a demodulator |
| 10/06/1981 | US4292800 Textile machine data link apparatus |
| 10/01/1981 | WO1981002714A1 Selection stage of the ac signal having the greater amplitude |
| 09/29/1981 | US4292593 Method of demodulating a quadphase coded data signal and receiver for carrying out the method |
| 09/23/1981 | EP0036344A1 Method for phase-modulation by a binary signal, and device for carrying out this method |
| 09/23/1981 | EP0036084A1 Process and device for the control of the initial adjustment of the clock of a receiver for synchronous data |
| 09/23/1981 | EP0035992A1 Data transmission arrangement. |
| 09/22/1981 | US4291408 System for monitoring bit errors |
| 09/22/1981 | US4291277 Adaptive predistortion technique for linearizing a power amplifier for digital data systems |
| 09/22/1981 | US4291275 Frequency demodulation system |
| 09/17/1981 | WO1981002656A1 Method and apparatus for demodulating quadriphase differential transmissions |
| 09/15/1981 | US4290140 Combined coherent frequency and phase shift keying modulation system |
| 09/09/1981 | EP0035434A1 Transmitting and receiving device for the transmission of digital signals |
| 09/09/1981 | EP0035295A1 Clock phase control method for a digital data receiving system, phase recovery circuit for carrying out this method and digital data receiving system comprising this circuit |
| 09/09/1981 | EP0035257A1 Device for switching off a receiver at a small signal-to-noise ratio for a digital modulation radio system |
| 09/09/1981 | EP0035050A1 Receiver |
| 09/08/1981 | US4288664 Neutralization signal developing device for an echo suppressor |
| 09/08/1981 | CA1108700A1 Digital radio paging communication system |
| 09/03/1981 | WO1981002500A1 Message communication system |
| 09/03/1981 | WO1981002498A1 Transceiver for phase-shift modulated signals |
| 09/02/1981 | EP0034988A1 Demodulator for frequency modulation modem |
| 09/02/1981 | EP0034973A1 Linear digital modulation device for radio link transmitter |
| 09/01/1981 | US4287596 Data recovery system for use with a high speed serial link between two subsystems in a data processing system |
| 09/01/1981 | CA1108261A1 Fault locating apparatus for digital transmission system |
| 08/26/1981 | EP0034467A1 Receivers suitable for use in remotely-operable switching devices and data transmission systems |
| 08/26/1981 | EP0034383A1 Coherent receiver for angle-modulated data signals |
| 08/25/1981 | US4286224 FM data demodulator including circuit for eliminating step distortion |
| 08/25/1981 | US4286223 Wideband digital frequency discriminator and phase and frequency detector |
| 08/25/1981 | US4286221 Multi-frequency signal receiving apparatus |
| 08/25/1981 | CA1107869A1 Methods and apparatus for rejection of interference in a digital communications system |
| 08/25/1981 | CA1107823A1 Digital filter bank detector |
| 08/18/1981 | US4285062 Digital multi-level multi-phase modulation communication system |
| 08/18/1981 | US4285061 Equalizer sample loading in voiceband data sets |
| 08/18/1981 | US4284979 Coding system for simultaneously signaling selected ones of a plurality of devices |
| 08/18/1981 | CA1107371A1 Adaptive phase detection method and apparatus |
| 08/11/1981 | US4283790 Transistorized modulator for pulse radar |
| 08/11/1981 | US4283682 Erasure zone decision feedback phase lock loop for carrier recovery in data modems |
| 08/11/1981 | CA1106977A1 Microprogrammed unit for a data set incorporating a modem for use at a data transmission terminal and an associated exchange of a data network |
| 08/11/1981 | CA1106919A1 Method and device for determining the phase intercept in a system employing phase-shift keying modulation |
| 08/04/1981 | US4282497 Frequency modulator having linearized operation |
| 07/28/1981 | US4281412 Method of and apparatus for transmitting and recovering offset QPSK modulated data |
| 07/28/1981 | US4281293 Planar QPSK demodulator |
| 07/28/1981 | CA1106086A1 Channel monitoring system |
| 07/28/1981 | CA1106067A1 Error correction system for differential phase-shift- keying |