| Patents for H04L 27 - Modulated-carrier systems (89,721) |
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| 04/26/1988 | US4740997 Band clock offset phase locked loop |
| 04/26/1988 | US4740996 Temperature independent, low level, AM modem receiver |
| 04/26/1988 | US4740995 Variable frequency sinusoidal signal generator, in particular for a modem |
| 04/26/1988 | CA1235760A1 Digital signal processor |
| 04/26/1988 | CA1235755A1 Carrier reproducing circuit for phase shift keying signals |
| 04/26/1988 | CA1235754A1 Digital demodulator arrangement for quadrature signals |
| 04/21/1988 | WO1988002963A1 Device for receiving broadcasts, television programs or radar echoes |
| 04/21/1988 | WO1988002962A1 Device and method for the transmission or storage of information optimising the use of the band-pass |
| 04/20/1988 | EP0263845A1 Improvements relating to communication systems. |
| 04/19/1988 | US4739328 System for identifying particular objects |
| 04/19/1988 | US4739288 Combined phase and frequency modulator for modulating an information signal |
| 04/19/1988 | CA1235460A1 Arrangement for recovering a clock signal from an angle-modulated carrier signal having a modulation index m = 0.5 |
| 04/14/1988 | DE3630117A1 Method for coding and transmitting analog information |
| 04/13/1988 | EP0263282A2 Signalling receiver |
| 04/12/1988 | US4737969 Spectrally efficient digital modulation method and apparatus |
| 04/12/1988 | US4737728 Digitally processed demodulator for quadrature modulated signals |
| 04/11/1988 | EP0138988A4 Simultaneous transmission of speech and data over an analog channel. |
| 04/07/1988 | WO1988002581A1 Adaptive correction of dc error transients |
| 04/07/1988 | DE3733096A1 Data demodulating circuit for an FM multiplex radio receiver |
| 04/07/1988 | DE3633065A1 Telecontrol device for digital data transmission by means of frequency shift keying |
| 04/06/1988 | EP0262843A2 Raised cosine filtering for modems |
| 04/06/1988 | EP0262842A2 FSK Modem |
| 04/06/1988 | EP0262644A2 QAM Demodulator with rapid resynchronization function |
| 04/05/1988 | US4736389 Technique for synthesizing the modulation of a time varying waveform with a data signal |
| 04/05/1988 | US4736388 Automatic fall back and restore system for data communication |
| 04/05/1988 | US4736386 Carrier out-of-lock detector apparatus |
| 04/05/1988 | US4736170 Unbalanced quarternary PSK modulator using unbalanced quadrature coupler |
| 04/05/1988 | CA1234881A2 Carrier detection circuit |
| 04/05/1988 | CA1234873A1 Modem for rf subscriber telephone system |
| 03/30/1988 | EP0261113A1 System and method for transporting data |
| 03/30/1988 | CN87106379A 调制解调器和数据通信系统 Modems and data communication systems |
| 03/24/1988 | WO1988002203A1 Midlevel carrier modulation and demodulation techniques |
| 03/24/1988 | WO1988002199A1 Method and system for modulating a carrier signal |
| 03/23/1988 | EP0260470A2 High speed modem |
| 03/22/1988 | US4733401 Block coding into 24 coordinates and detection of transmitted signals |
| 03/16/1988 | EP0259867A2 Demodulator for psk-modulated signals |
| 03/15/1988 | US4731816 Ensemble modem structure for imperfect transmission media |
| 03/15/1988 | US4731801 Method for the reception and detection of digital signals |
| 03/15/1988 | US4731800 Raised-cosine filtering for modems |
| 03/15/1988 | US4731799 Means and method for block encoding detection and decoding |
| 03/15/1988 | US4731798 Method for transmitting information, in which the signals are coded as amplitudes of the half-waves or periods of a sinusoidal alternating current |
| 03/15/1988 | CA1234189A1 Psk demodulator having an afc circuit |
| 03/09/1988 | EP0258697A2 FSK Signal demodulator |
| 03/09/1988 | EP0258649A2 Carrier recovery of modulated signals |
| 03/09/1988 | EP0258584A2 Handshake sequence detector and method for detecting a handshake sequence |
| 03/09/1988 | CN87104950A Synthetic digital modulator |
| 03/09/1988 | CN87104106A Interactive television and data transmission system |
| 03/08/1988 | US4730345 Vestigial sideband signal decoder |
| 03/08/1988 | US4730344 Quadrature-quadrature phase shift keying with constant envelope |
| 03/08/1988 | CA1233887A1 Frequency converting circuit |
| 03/03/1988 | DE3629206A1 Method for transmitting a bit sequence by coded octonary phase-shift keying of a carrier oscillation |
| 03/02/1988 | EP0257625A2 Lock circuit for carrier recovery from a QAM signal |
| 03/02/1988 | EP0257584A1 Carrier recovery circuitry immune to interburst frequency variations |
| 03/02/1988 | EP0257544A2 Receiving device for microwave signals |
| 03/02/1988 | EP0257301A2 PSK system and modem |
| 03/01/1988 | US4728815 Data shaping circuit |
| 03/01/1988 | CA1233525A1 Method for improving the reliability of data transmission over rayleigh fading channels |
| 02/25/1988 | WO1988001458A1 Modem and data communication system |
| 02/25/1988 | WO1988000417A3 Method and installation for digital communication, particularly between and toward moving vehicles |
| 02/24/1988 | EP0256700A2 Apparatus for synthesizing the modulation of a time varying waveform with a data signal |
| 02/23/1988 | US4727534 Timing and carrier recovery in dual polarization communications systems |
| 02/17/1988 | EP0255972A2 Multi-stage transmitter-antenna coupling device |
| 02/17/1988 | EP0255838A1 Signal processing system |
| 02/17/1988 | EP0053629B1 Voiceband data set |
| 02/16/1988 | US4726043 Data decision-directed timing and carrier recovery circuits |
| 02/16/1988 | US4726041 Digital filter switch for data receiver |
| 02/16/1988 | US4726039 Constant amplitude PSK modulator |
| 02/16/1988 | US4726038 Digital communication system |
| 02/16/1988 | US4726029 Error-correcting modem |
| 02/16/1988 | CA1232949A1 System for broadcasting of data, particularly to mobile stations |
| 02/11/1988 | DE3626792A1 Device for stabilising the transmitting and receiving frequency of a transmitting set |
| 02/09/1988 | US4724534 Method and apparatus for transmitting binary data signals by frequency shift keying |
| 02/03/1988 | EP0254877A2 Automatic drift control circuit |
| 02/03/1988 | EP0254846A1 Data transmission method and apparatus |
| 02/03/1988 | EP0254844A2 Digital pipelined heterodyne circuit |
| 02/03/1988 | CN87104871A Modem with improved digital signal processor |
| 02/02/1988 | US4723310 Digital data transmission system by coherent light wave modulation |
| 02/02/1988 | CA1232325A1 Coherent optical communication system with fsk heterodyne or homodyne detection and little influence by distortion of a modulated optical signal |
| 01/28/1988 | WO1988000778A1 Optical superheterodyne receiver in particular for phase shift modulated light |
| 01/27/1988 | EP0254231A1 Optical heterodyne receiver, especially for PSK modulated light |
| 01/27/1988 | EP0254175A2 PSK system and modem |
| 01/27/1988 | EP0254061A2 Digital demodulator |
| 01/26/1988 | US4721928 Multilevel modulator capable of producing a multilevel quadrature amplitude modulated signal having (2n +α) output signal points |
| 01/26/1988 | CA1232035A1 Frequency demodulator for recovering digital signals |
| 01/26/1988 | CA1232025A1 Frequency control for point to multipoint radio |
| 01/26/1988 | CA1232023A1 Method and apparatus for supervising digital radio transmission line |
| 01/26/1988 | CA1232022A1 Radio communication system |
| 01/26/1988 | CA1232021A1 Digital signal processor modem |
| 01/20/1988 | EP0253368A1 System for identifying particular objects |
| 01/20/1988 | EP0253039A1 Method and apparatus for the protection against echos in a modem |
| 01/19/1988 | CA1231759A1 Synchronous digital demodulator with carrier error correction |
| 01/14/1988 | WO1988000417A2 Method and installation for digital communication, particularly between and toward moving vehicles |
| 01/14/1988 | DE3621682A1 Device for transmitting signals and multi-frequency code receivers suitable for this purpose |
| 01/14/1988 | DE3621680A1 Multi-frequency code receiver and device equipped therewith for transmitting signals |
| 01/13/1988 | EP0252589A2 Digital communication system |
| 01/13/1988 | EP0252500A2 8-Phase phase-shift keying demodulator |
| 01/12/1988 | CA1231388A1 Bit error detection circuit for psk-modulated carrier wave |
| 01/07/1988 | EP0250924A1 Method for digital data transmission using continuous phase modulation |
| 01/05/1988 | US4717894 Calibration of vector modulators using a scalar detector |
| 12/29/1987 | US4716579 Phase corrector |