| Patents for H04L 27 - Modulated-carrier systems (89,721) |
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| 01/24/1989 | US4800574 Digital modulator/demodulator including non-linear analog-to-digital converter and circuitry compensating for the non-linearity of the converter |
| 01/24/1989 | US4800573 Equalization arrangement |
| 01/24/1989 | US4800572 Adapter frequency range equalizer for digital radio relay systems |
| 01/19/1989 | DE3722936A1 Optical heterodyne receiver for, in particular, phase-shift-keyed light |
| 01/17/1989 | US4799240 Clock synchronizing circuit including a voltage controlled oscillator |
| 01/17/1989 | US4799239 Phase-coherent FSK signal demodulator |
| 01/17/1989 | US4799238 Differential phase shift keying method for the transmission of data |
| 01/17/1989 | US4799025 Digital FM demodulator using digital quadrature filter |
| 01/11/1989 | EP0298484A1 Optical FSK homodyne receiver |
| 01/10/1989 | US4797931 Audio frequency signal identification apparatus |
| 01/10/1989 | US4797923 Super resolving partial wave analyzer-transceiver |
| 01/10/1989 | CA1248590A1 Wide band data transmission over an electricity distribution network |
| 01/04/1989 | EP0297774A2 Phase controlled demodulator for digital communications system |
| 01/04/1989 | EP0108789B1 A communication system having improved differential phase shift keying modulation |
| 01/03/1989 | US4796028 Apparatus for bidirectional data transmission |
| 01/03/1989 | US4795986 Method and circuit for carrier synchronism recovery in PSK coherent demodulators |
| 01/03/1989 | CA1248221A1 Digital data recovery circuit |
| 01/03/1989 | CA1248182A1 Multidimensional, convolutionally coded communication systems |
| 12/29/1988 | DE3719670A1 Method for the transmission of information, in particular for telecommunications systems |
| 12/28/1988 | EP0296822A2 Carrier-to-noise detector for digital transmission systems |
| 12/28/1988 | EP0296175A1 Method and installation for digital communication, particularly between and toward moving vehicles. |
| 12/27/1988 | US4794624 Method for clock synchronization of a signal receiver |
| 12/27/1988 | US4794623 Recovery of carrier signal from QAM double sideband suppressed carrier IF signal for use in synchronous demodulation |
| 12/27/1988 | US4794621 Apparatus for transmitting information by angle modulation |
| 12/27/1988 | US4794620 Radio frequency modem and method |
| 12/27/1988 | US4794555 Waveform shaping circuit |
| 12/20/1988 | US4792964 Adaptive jitter canceller having sinusoidal accentuator and jitter prediction filter |
| 12/20/1988 | US4792952 Signal receiver |
| 12/13/1988 | US4791630 Method and apparatus for optical communication by frequency modulation |
| 12/13/1988 | US4791600 Digital pipelined heterodyne circuit |
| 12/13/1988 | CA1246707A1 Apparatus for cancelling periodic carrier phase jitters |
| 12/07/1988 | EP0293991A1 Receiver for a phase-shift keyed carrier signal |
| 12/07/1988 | EP0293620A1 Method of signal transmission |
| 12/06/1988 | US4789995 Synchronous timer anti-alias filter and gain stage |
| 12/06/1988 | CA1246260A1 Modem communication system having training means and method for training same |
| 12/06/1988 | CA1246258A1 Modem with power-off ring detection |
| 12/06/1988 | CA1246153A1 Radio receiver |
| 12/06/1988 | CA1246152A1 Technique for acquiring timing and frequency synchronization for modem utilizing known (non-data) symbols as part of their normal transmitted data format |
| 12/06/1988 | CA1246148A1 Radio system wherein transmission power is varied according to transmission quality |
| 12/01/1988 | WO1988009591A1 Method of demodulation in digital communication systems with multipath propagation |
| 11/30/1988 | EP0292935A2 Phase comparator |
| 11/29/1988 | US4788696 Decision timing control circuit |
| 11/24/1988 | DE3716064A1 Modulator for generating an amplitude-keyed radio-frequency signal |
| 11/24/1988 | DE3716060A1 Modulator for generating a frequency-shift-keyed RF signal |
| 11/24/1988 | DE3716054A1 Modulator |
| 11/23/1988 | EP0291979A1 Method for demodulating digitally modulated signals, and device for carrying out the method |
| 11/23/1988 | EP0291947A2 Demodulator including sweep controller for controlling synchronization capture range |
| 11/23/1988 | EP0291826A1 Digital demodulator |
| 11/22/1988 | US4787096 Second-order carrier/symbol sychronizer |
| 11/22/1988 | US4786909 Receiving circuit |
| 11/22/1988 | US4786882 Quadriphase phase modulation system |
| 11/15/1988 | US4785468 Intermittent receiver |
| 11/15/1988 | US4785255 Digital FSK signal demodulator |
| 11/10/1988 | DE3714962A1 Device for receiving signals |
| 11/01/1988 | US4782523 Tone detection process and device for implementing said process |
| 11/01/1988 | CA1244138A1 Data transmitting-receiving system |
| 10/25/1988 | US4780887 Carrier recovery circuitry immune to interburst frequency variations |
| 10/25/1988 | US4780886 Device for detecting a data signal energy drop |
| 10/25/1988 | US4780884 Suppressed double-sideband communication system |
| 10/20/1988 | WO1988008230A1 Phase synchronizing system |
| 10/19/1988 | EP0286665A1 Device and method for the transmission or storage of information optimising the use of the band-pass. |
| 10/18/1988 | CA1243368A1 Adaptable demodulator for arbitrary amplitude and phase keyed modulation signals |
| 10/18/1988 | CA1243360A1 Receiving circuit |
| 10/13/1988 | DE3710116A1 Demodulator for frequency shift-keyed signals |
| 10/11/1988 | US4777640 Modem receiver circuit |
| 10/11/1988 | US4777605 Method and apparatus for identifying the components of a signal |
| 10/11/1988 | US4777453 Quadrature amplitude modulator using switched capacitor filter |
| 10/11/1988 | US4777331 Method and arrangement for transmitting binary-coded information in a measuring system |
| 10/11/1988 | CA1243084A1 Phase detection circuit |
| 10/11/1988 | CA1243083A1 Fsk demodulator |
| 10/11/1988 | CA1243080A1 Arrangement for generating an angle-modulated carrier signal of constant amplitude in response to data signals |
| 10/06/1988 | DE3709451A1 Method for coding the television signals |
| 10/05/1988 | EP0284734A2 Circuit for the recognition of dual tone multifrequency signals in telephone exchanges |
| 10/04/1988 | US4775988 Method for rapid gain acquisition in a modem receiver |
| 10/04/1988 | CA1242766A1 Error-correction coding for multilevel transmission system |
| 09/29/1988 | DE3707762A1 Frequency detector |
| 09/29/1988 | DE3707761A1 Demodulator |
| 09/28/1988 | EP0284019A2 Method for producing frequency and/or phase shifts in alternating currents, used in particular for quadrature amplitude modulation (QAM) and for taking samples |
| 09/28/1988 | EP0283725A2 QAM Modulator |
| 09/27/1988 | US4774716 Method for the transmission of digital data |
| 09/22/1988 | WO1988007303A1 Timing error detector |
| 09/22/1988 | WO1988007302A1 Digital demodulator apparatus |
| 09/22/1988 | WO1988007294A1 Process and circuitry for timing synchronization |
| 09/20/1988 | US4773083 In a communication system |
| 09/14/1988 | EP0282298A2 Method and apparatus for combining encoding and modulation |
| 09/14/1988 | EP0281738A2 Multicarrier demodulation method |
| 09/14/1988 | EP0281652A1 Method for obtaining a phase difference signal |
| 09/14/1988 | EP0281566A1 Method of data communication by radio and arrangement therefor |
| 09/13/1988 | US4771438 Method and apparatus for phase reference recovery in high speed fast turnaround modem |
| 09/13/1988 | US4771417 High speed modem |
| 09/07/1988 | EP0281308A2 Decision-directed control circuit and method of adjusting decision-directed apparatus |
| 09/06/1988 | US4769816 Qpsk demodulator |
| 09/06/1988 | CA1241708A1 Receiver for power line communication systems |
| 09/01/1988 | DE3805582A1 Codier- und decodiereinrichtungen fuer kanaele mit partialcharakteristik Encoding and decoding equipment for channels with partialcharakteristik |
| 08/30/1988 | US4768187 In a radio communication system |
| 08/30/1988 | CA1241390A1 Multi-level decision circuit |
| 08/30/1988 | CA1241378A1 Multi-speed, full duplex modem |
| 08/30/1988 | CA1241377A1 Wave packet communication subsystem for determining the sync pulses and correlating the data pulses of a wave packet |
| 08/23/1988 | CA1241068A1 Carrier recovery circuit |
| 08/17/1988 | EP0278192A1 Method for digitally broadcasting in television channels |