| Patents for H04L 27 - Modulated-carrier systems (89,721) |
|---|
| 08/16/1988 | US4764940 Modem for RF subscriber telephone system |
| 08/16/1988 | US4764730 Radio receiver demodulation system |
| 08/16/1988 | CA1240739A1 Digital data decoder and method |
| 08/16/1988 | CA1240738A1 Digital envelope detection circuit |
| 08/11/1988 | WO1988005983A1 Spectrally efficient digital modulation method and apparatus |
| 08/11/1988 | WO1988005945A1 Viterbi decoder with reduced number of data move operations |
| 08/10/1988 | EP0277471A1 Method for the detection and correction of transmission errors |
| 08/09/1988 | US4763290 Apparatus for performing a fast Fourier transform |
| 08/09/1988 | US4763103 Process and method for wide band transmission, particularly for data transmission over an electricity distribution network |
| 08/04/1988 | DE3701866A1 Method for pre-emphasising digital baseband signals |
| 08/03/1988 | EP0276868A2 Demodulation circuit |
| 08/02/1988 | US4761798 Baseband phase modulator apparatus employing digital techniques |
| 08/02/1988 | US4761784 Modem and method using multidimensional coded modulation |
| 08/02/1988 | US4761751 Method and apparatus for generating digital signals representing periodic samples of a sine wave |
| 08/02/1988 | CA1240013A1 Control signalling arrangement for a digital transmission system |
| 08/02/1988 | CA1240001A1 Demodulation device for multiphase psk or multilevel qam carrier wave |
| 08/02/1988 | CA1239995A1 Digital signal repeater including means for controlling a transmitter |
| 07/28/1988 | WO1988005571A1 Modem and method using multidimensional coded modulation |
| 07/27/1988 | EP0275920A2 Heterodyne optical receiver having an optical coupler and an electronic amplifier |
| 07/26/1988 | US4760354 SSB pulse modulator |
| 07/26/1988 | US4760344 Phase shift keying signal demodulation method and apparatus |
| 07/21/1988 | DE3700527A1 Receiver for frequency-shift-keyed RF signals |
| 07/19/1988 | US4759080 Coherent optical communication system with FSK heterodyne or homodyne detection and little influence by distortion of a modulated optical signal |
| 07/19/1988 | US4759039 Simplified recovery of data signals from quadrature-related carrier signals |
| 07/19/1988 | US4759037 Passband equalization of modulated quadrature-related carrier signals |
| 07/19/1988 | US4759036 Decision-directed control circuit |
| 07/19/1988 | CA1239479A1 Coded modulation system |
| 07/19/1988 | CA1239449A1 Radio receiver |
| 07/14/1988 | WO1988005214A1 Automatic antenna tuning system for portable communication devices |
| 07/13/1988 | EP0274050A2 Method and arrangement for the synchronization of a receiver in digital transmission systems |
| 07/12/1988 | US4757519 Digital premodulation filter |
| 07/12/1988 | US4757516 Transversal equalizer |
| 07/12/1988 | US4757495 Speech and data multiplexor optimized for use over impaired and bandwidth restricted analog channels |
| 07/12/1988 | US4757272 Four phase PSK demodulator |
| 07/12/1988 | US4757266 Demodulation system capable of establishing synchronization in a transient state |
| 07/06/1988 | EP0273827A2 Device and method for amplitude and phase modulation using a plurality of transmitters |
| 07/06/1988 | EP0273815A1 Method and device for multistate modulation and demodulation with an adjustable protection level |
| 07/06/1988 | EP0273504A1 Circuit for extracting carrier signals |
| 07/05/1988 | US4756009 Method for transmitting digital data |
| 07/05/1988 | US4756008 Digitized quadrature phase shift keying modulator |
| 07/05/1988 | US4756007 Adaptive communication rate modem |
| 07/05/1988 | US4755998 Coded modulation system |
| 07/05/1988 | US4755773 Phase modulator apparatus for generating a burst phase-modulated wave |
| 07/05/1988 | US4755763 Demodulator capable of avoiding abnormal demodulation |
| 07/05/1988 | CA1238952A1 Demodulation circuit |
| 06/30/1988 | DE3643689A1 Method and arrangement for digital pre-emphasis of 16 QAM signals |
| 06/28/1988 | US4754481 Expanded partial response processing for analog signal enciphering and the like |
| 06/28/1988 | US4754235 Frequency synthesizer with low power consumption |
| 06/28/1988 | CA1238697A1 Digital quadrature amplitude modulator |
| 06/23/1988 | DE3642029A1 Arrangement for transmitting data carrier signals |
| 06/21/1988 | US4752968 Antenna diversity reception system for eliminating reception interferences |
| 06/21/1988 | US4752943 Frequency of occurrence retraining decision circuit |
| 06/21/1988 | US4752742 Frequency demodulator for recovering digital signals |
| 06/21/1988 | CA1238370A1 Receiver unit in radio communication system |
| 06/21/1988 | CA1238369A1 Diversity system of selection type equipped with a code correction/switch circuit for receiving a psk or qam wave carrying differentially encoded signal |
| 06/21/1988 | CA1238368A1 Digital radio receiving apparatus |
| 06/21/1988 | CA1238366A1 Arrangement for generating an angle-modulated carrier signal of a constant amplitude in response to data signals |
| 06/16/1988 | WO1988004500A1 Digital signal coding |
| 06/16/1988 | WO1988004498A1 Duplex data transmission |
| 06/15/1988 | EP0271266A2 Signal processing |
| 06/14/1988 | US4751478 Multilevel modulator capable of producing a composite modulated signal comprising a quadrature amplitude modulated component and a phase modulated component |
| 06/14/1988 | CA1238086A1 Data transmission using a transparent tone-in band system |
| 06/08/1988 | EP0270172A1 Frequency discriminator for a coherent optical transmission system |
| 06/08/1988 | EP0270160A2 Process and circuit for acquisition of carrier synchronism in coherent demodulators |
| 06/07/1988 | US4750192 Method for transmitting digital data by means of continuous phase modulation |
| 06/07/1988 | US4750191 D/A converter capable of producing an analog signal having levels of a preselected number different from 2N and communication network comprising the D/A converter |
| 06/07/1988 | US4750036 Interactive television and data transmission system |
| 06/01/1988 | EP0268842A1 Adaptive passband equalizer for digital radio relay link systems |
| 05/31/1988 | US4748642 Double detection video processing apparatus |
| 05/31/1988 | US4748641 Transmitting binary coded data between stations |
| 05/31/1988 | US4748639 Method for processing data bit signals |
| 05/31/1988 | US4748626 Viterbi decoder with reduced number of data move operations |
| 05/31/1988 | CA1237477A1 Data frequency modulator with deviation control |
| 05/25/1988 | EP0268292A2 Interference immune digital modulation receiver |
| 05/24/1988 | US4746872 Differential phase shift keying demodulator |
| 05/24/1988 | CA1237172A1 Digital demodulator for continuously phase or frequency modulated signals |
| 05/18/1988 | EP0267280A1 Interactive television and data transmission system. |
| 05/18/1988 | EP0147414B1 Method for the non-coherent demodulation of a constant symbol powered, linearly modulated signal and demodulator for implementing such method |
| 05/18/1988 | CN87105897A Multi-stage transmitter aerial coupling device |
| 05/17/1988 | US4745628 Symbol generator for phase modulated system |
| 05/17/1988 | US4745627 Procedure and circuit for detection of the information of a received signal |
| 05/17/1988 | US4745625 Transition detector |
| 05/11/1988 | EP0266965A2 Voiceband signal classification |
| 05/11/1988 | EP0266962A2 Voiceband signal classification |
| 05/10/1988 | US4744096 Clock recovery circuit |
| 05/10/1988 | US4744094 BPSK demodulator with D type flip/flop |
| 05/03/1988 | US4742534 Telephone receiving equipment for recognizing predetermined combinations of voice-frequency signalling components |
| 05/03/1988 | US4742533 Soft decision digital communication apparatus |
| 05/03/1988 | US4742532 High speed binary data communication system |
| 05/03/1988 | US4742251 Precise call progress detector |
| 05/03/1988 | CA1236219A1 Analog signal verification circuit |
| 05/03/1988 | CA1236180A1 Surface acoustic wave device for data rate reduction |
| 05/03/1988 | CA1236168A1 Digital radio communication system utilizing quadrature modulated carrier waves |
| 04/28/1988 | DE3635534A1 Transmission system |
| 04/27/1988 | EP0265278A2 Optical FSK demodulator |
| 04/27/1988 | EP0265272A2 Direct synthesis modem |
| 04/27/1988 | EP0265218A2 Vector modulators and calibration thereof |
| 04/27/1988 | EP0265210A2 Phase-shift keyed carrier recovery |
| 04/27/1988 | EP0265131A2 Simplified recovery of data signals from quadrature-related carrier signals |
| 04/27/1988 | EP0163685B1 Apparatus for correcting frequency-dependent attenuation of the transmitting medium in signal transmission |