| Patents for H04L 27 - Modulated-carrier systems (89,721) |
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| 07/22/1981 | EP0032325A1 Binary phase shift modulations, and modulators |
| 07/22/1981 | EP0032253A1 Demodulator carrier recovery loop and method for demodulating a signal |
| 07/22/1981 | EP0032152A1 One-bit frequency-shift-keyed modulator |
| 07/21/1981 | CA1105575A1 Amplitude and frequency modulation system |
| 07/14/1981 | US4278952 Quantized angle modulator |
| 07/14/1981 | CA1105099A1 8-phase psk modulator |
| 07/09/1981 | WO1981001934A1 Apparatus for synthesizing a modulated carrier |
| 07/09/1981 | WO1981001929A1 Receiver for phase-shift modulated carrier signals |
| 07/08/1981 | EP0031774A2 16-stage MAMSK modulation procedure for a digital data transmission system and modulators and demodulator therefor |
| 07/08/1981 | EP0031762A2 Modulator-demodulator for transmission by a four-level double amplitude modulation on quadrature carriers |
| 07/08/1981 | EP0031746A2 Circuit for the demodulation of a signal modulated by digital information and receiver comprising such a circuit |
| 07/07/1981 | US4277778 Information transmitting system |
| 07/07/1981 | CA1104694A1 Method and apparatus for regenerating a modified duobinary signal |
| 07/07/1981 | CA1104693A1 Modified duobinary repeatered span line |
| 07/01/1981 | EP0031193A1 Double sideband quadrature carrier modulation system and method of transmitting information using the point constellation of such a system |
| 06/30/1981 | US4276650 Method of synchronizing a quadphase receiver and clock synchronization device for carrying out the method |
| 06/24/1981 | EP0030864A1 Carrier wave recovery circuit |
| 06/24/1981 | EP0030584A1 Process and device for digitally controlling the carrier phase in receivers of data transmission systems |
| 06/24/1981 | EP0030551A1 A technique for increasing the rain margin of a communication system. |
| 06/23/1981 | US4275465 Clock rate recovery circuit |
| 06/11/1981 | WO1981001637A1 Data processing system with serial data transmission between subsystems |
| 06/11/1981 | WO1981001623A1 Programmable multifrequency tone receiver |
| 06/09/1981 | US4272845 Receiver for data-transmission system operating with single-sideband amplitude modulation |
| 06/09/1981 | CA1102919A1 Digital tone decoder system |
| 06/09/1981 | CA1102887A1 Multifrequency signal receiver |
| 06/03/1981 | EP0029688A1 Digital data transmission systems |
| 06/02/1981 | US4271527 Double side band-quadrature carrier modulation signal structures |
| 06/02/1981 | US4271524 Spread spectrum FH-MFSK receiver |
| 06/02/1981 | CA1102420A1 Poly-phase modulation systems |
| 05/26/1981 | US4270206 Transceiver for phase-shift modulated carrier signals |
| 05/20/1981 | EP0028857A1 Device for carrier detection in a modem provided with an echo canceller |
| 05/13/1981 | EP0028404A1 Receiver for push-button PCM-encoded multifrequency signals |
| 05/12/1981 | US4267591 QPSK Suppressed carrier with rotating reference phase |
| 04/28/1981 | US4264975 Receiver for frequency modulated signals having two quadrature channels |
| 04/22/1981 | EP0027314A1 Data receiver including means for forming line samples and method of operating such a data receiver |
| 04/22/1981 | EP0027152A1 Method and apparatus for transmitting periodic electrical signals with a very low frequency-error tolerance |
| 04/21/1981 | US4263670 Microprocessor data modem |
| 04/16/1981 | WO1981001089A1 Control of coefficient drift for fractionally spaced equalizers |
| 04/16/1981 | WO1981001088A1 Equalizer for complex data signals |
| 04/14/1981 | US4262360 Method and device for detecting a pseudo-random sequence of carrier phase changes of 0° and 180° in a data receiver |
| 04/14/1981 | CA1099350A1 Phase discriminator in a receiver for a data transmission system |
| 04/14/1981 | CA1099345A1 Tone signal detector |
| 04/08/1981 | EP0026657A2 Transmitter and receiver for textile machine data link arrangement |
| 04/08/1981 | EP0026624A2 A coherent phase demodulator for power line communication systems |
| 04/08/1981 | EP0026597A1 Data receiver adapted to receive a modulated signal and method of operating such a data receiver |
| 04/08/1981 | EP0026372A1 Local oscillator phase control circuit for a receiver of data signals transmitted by single side-band amplitude modulation |
| 04/07/1981 | US4261053 PSK Modulator with reduced adjacent channel interference |
| 04/01/1981 | EP0026064A1 Improvements in or relating to timing recovery for modems |
| 04/01/1981 | EP0026035A1 Apparatus for generating constant-envelope, angle-modulated signals |
| 03/31/1981 | US4259740 Sequential detection system |
| 03/31/1981 | US4259729 Dynamic memory |
| 03/31/1981 | US4259648 One-bit frequency-shift-keyed modulator |
| 03/24/1981 | CA1098184A1 Arrangement for combining data symbols in accordance with a predetermined weighting function |
| 03/19/1981 | WO1981000798A1 Timing acquisition in voiceband data sets |
| 03/19/1981 | WO1981000797A1 Equalizer sample loading in voiceband data sets |
| 03/18/1981 | EP0025217A1 Clock recovery circuit for burst communications systems |
| 03/17/1981 | CA1097743A1 Modem for the high speed transmission of binary data over an fm communications system |
| 03/10/1981 | US4255713 Carrier regeneration circuit for polyphase modulation system |
| 03/03/1981 | US4254503 Radio receiver for tone modulated signals |
| 03/03/1981 | CA1096945A1 Solid state power combiner |
| 02/24/1981 | US4253189 Circuit for recovering the carrier of an amplitude modulated synchronous digital signal |
| 02/24/1981 | US4253186 Method and device for detecting a pseudo-random sequence of two symbols in a data receiver employing double sideband-quadrature carrier modulation |
| 02/24/1981 | US4253184 Phase-jitter compensation using periodic harmonically related components |
| 02/24/1981 | US4253089 Signal transmission device for electric rotary machine |
| 02/17/1981 | CA1095991A1 Frequency-modulated data communications receivers |
| 02/11/1981 | EP0023605A1 Wireless communication system |
| 02/11/1981 | EP0023511A1 Process and device for detecting and interpreting a distress signal. |
| 02/10/1981 | US4250456 Device for demodulating PSK-FM double modulated carrier signals |
| 02/10/1981 | CA1095594A1 Clock extraction device for double-binary phase-shift keying system |
| 02/05/1981 | WO1981000334A1 One-bit frequency-shift-keyed modulator |
| 01/27/1981 | US4247944 V.29 Constellation detection method and apparatus |
| 01/27/1981 | US4247943 Piecewise coherent, combined frequency and phase-shift-keyed signal demodulator |
| 01/27/1981 | US4247942 Jam resistant communication system |
| 01/27/1981 | US4247940 Equalizer for complex data signals |
| 01/27/1981 | US4247938 Method for generating a pseudo-signal in an error rate supervisory unit and circuit for carrying out the same |
| 01/27/1981 | CA1094643A1 Duplex data tansmission modem utilizing an injected tone for shifting power within the transmit spectrum |
| 01/20/1981 | US4246654 Digital coherent phase demodulator |
| 01/20/1981 | US4246653 In-phase quadrature demodulator for CPSK signals |
| 01/20/1981 | CA1094174A1 Sampling filter-detector |
| 01/13/1981 | US4245345 Timing acquisition in voiceband data sets |
| 01/13/1981 | US4245215 Power line signalling system |
| 01/13/1981 | CA1093718A1 Process for receiving unique words |
| 01/13/1981 | CA1093644A1 Data receiver with synchronizing sequence detection circuit |
| 01/08/1981 | WO1981000034A1 A technique for increasing the rain margin of a communication system |
| 01/07/1981 | EP0021943A1 Microwave digital data transmission system |
| 01/07/1981 | EP0021544A1 System for the remote testing of a modem for a speed of transmission different from the speed of reception |
| 01/07/1981 | EP0020783A1 Phase correction circuit for a phase modulation system |
| 01/06/1981 | US4244047 Multiplexed carrier transmission through harmonic polluted medium |
| 01/06/1981 | US4243941 Digital signal receiver having a dual bandwidth tracking loop |
| 12/30/1980 | US4242641 Methods and apparatus for demodulating a differentially phase-modulated signal |
| 12/30/1980 | CA1092665A1 Multi-frequency signal receiver |
| 12/30/1980 | CA1092656A1 Receiver for data transmitted by means of the interleaved binary phase shift keyed modulation technique |
| 12/24/1980 | WO1980002900A1 Converter included in a phase modulator |
| 12/23/1980 | US4241454 Hard limiting acquisition technique for PSK carrier detector |
| 12/16/1980 | US4240035 Digital demodulator on a semiconductor base |
| 12/10/1980 | EP0020236A1 Clock signal synchronisation device and a differential phase demodulator comprising such a device |
| 12/09/1980 | US4238739 Preset network for a phase lock loop |
| 12/02/1980 | US4237554 Coefficient tap leakage for fractionally-spaced equalizers |
| 11/27/1980 | WO1980002631A1 Data transmission arrangement |
| 11/25/1980 | US4236249 Circuit arrangement for correcting frequency errors during a transmission of data |