| Patents for H04L 27 - Modulated-carrier systems (89,721) |
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| 07/25/1991 | WO1991011065A1 Method of and apparatus for controlling modulation of digital signals in frequency-modulated transmissions |
| 07/25/1991 | DE4001265A1 FSK digital data reception over power supply network - synchronising switching of signal with max. possible mean level to VCO clocked by control calculator |
| 07/25/1991 | CA2074169A1 Method of and apparatus for controlling modulation of digital signals in frequency modulated transmissions |
| 07/24/1991 | EP0438142A2 Method of controlling transmission of facsimile |
| 07/23/1991 | WO1991011053A1 A method of compensating for non-linearities in an end amplifier incorporated in a radio transmitter |
| 07/23/1991 | US5034963 Apparatus for visually aiding MSK detection and interference recognition and classification |
| 07/16/1991 | US5033110 Frequency converter for a radio communications system |
| 07/16/1991 | US5033063 Surface-acoustic-wave device |
| 07/09/1991 | US5031197 Timing error detector |
| 07/09/1991 | US5031133 FIR digital filter for high-speed communications systems |
| 07/09/1991 | US5030928 Zero crossing modulator |
| 07/09/1991 | CA1286002C Frequency synthesis method and a synthesizer apparatus using this method |
| 07/03/1991 | EP0435578A2 Low-distortion radio-frequency amplifying apparatus |
| 07/03/1991 | EP0435507A2 Interleaving in coded modulation for mobile radio |
| 07/03/1991 | EP0434689A1 Synchronous receiver for minimum shift keying transmission. |
| 07/02/1991 | US5029186 Method of demodulation in digital communication systems with multipath propagation |
| 07/02/1991 | US5029185 Coded modulation for mobile radio |
| 07/02/1991 | CA1285618C Method of obtaining a phase difference signal |
| 06/26/1991 | EP0434651A1 A method of effecting channel estimation for a fading channel when transmitting symbol sequences |
| 06/26/1991 | EP0434355A2 Differential phase demodulator for PSK-modulated signals |
| 06/26/1991 | EP0434235A2 Tone spacing and power level monitoring for FSK lightwave systems |
| 06/26/1991 | EP0433863A2 System and method for setting up a transmittter in high capacity digital radio links |
| 06/26/1991 | EP0433458A1 System for removing circuit signal deterioration |
| 06/25/1991 | US5027372 Differential phase shift keying modulator |
| 06/25/1991 | US5027352 Receiver frequency offset bias circuit for TDM radios |
| 06/23/1991 | WO1991010296A1 A method of effecting channel estimation for a fading channel when transmitting symbol sequences |
| 06/19/1991 | EP0433198A1 Amplitude modulation transmission system with suppressed carrier maintaining the polarity of the transmitted signal |
| 06/19/1991 | EP0433090A2 Demodulation control arrangement in satellite communications system using "SCPC-DAMA" |
| 06/19/1991 | EP0432674A2 QAM modulator with improved carrier suppression |
| 06/18/1991 | US5025455 Phase ambiguity resolution for offset QPSK modulation systems |
| 06/13/1991 | DE4025026A1 Code Division multiplexer with serial to parallel conversion - for values of PCM signal in half or full periods of sinusoidal AC |
| 06/12/1991 | EP0431983A2 Communication and control system |
| 06/12/1991 | EP0431982A2 Digital IC device arrangement |
| 06/12/1991 | CN1012872B Circuit for recovering carrier in digital transmission systems |
| 06/11/1991 | US5023950 Optical transmitter, optical receiver and optical transmission apparatus and control method of optical receiver |
| 06/11/1991 | US5023949 Apparatus for generating an FSK-modulated optical signal having two different polarization conditions for an optical transmission system having an optical two-filter FSK super-heterodyne receiver |
| 06/11/1991 | US5023948 Polarization modulation of optical signals using birefringent medium |
| 06/11/1991 | US5023892 System for detecting and correcting signal distortion |
| 06/11/1991 | US5023889 Trellis coded multilevel DPSK system with doppler correction for mobile satellite channels |
| 06/11/1991 | US5023562 Digitizing circuit for demodulated digital data signals |
| 06/11/1991 | CA1284827C Demodulation circuit |
| 06/05/1991 | EP0430531A2 Technique for determining signal dispersion characteristics in communications systems |
| 06/05/1991 | EP0430480A2 FSK time-delay demodulator with reduced DC-offset |
| 06/05/1991 | EP0430291A2 A data transfer system |
| 06/05/1991 | EP0430034A2 Automatic gain control |
| 06/05/1991 | EP0429948A2 Demodulator for an angle modulated signal and radio receiver having such a demodulator |
| 06/05/1991 | EP0429859A2 Frequency generator, which can be digitally frequency modulated |
| 06/05/1991 | EP0429674A1 Modem capable of detecting out-of-frame synchronism condition |
| 06/04/1991 | US5022054 Digital GMSK modulator with non-integer bit interval handling |
| 06/04/1991 | US5022053 Data communications with alternation of signaling constellations |
| 06/04/1991 | US5022049 Multiple access code acquisition system |
| 06/04/1991 | US5022048 Programmable digital frequency-phase discriminator |
| 06/04/1991 | US5022024 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels |
| 06/04/1991 | CA1284679C Tone detection process and device for implementing said process |
| 05/30/1991 | WO1991007720A1 Method and apparatus for magnetic recording of data |
| 05/28/1991 | US5020080 Demodulation method and demodulator for digital signals with amplitudes of constant envelope, continuously modulated in phase and/or in frequency |
| 05/28/1991 | US5020079 Apparatus for generating a minimum-shift-keying signal |
| 05/28/1991 | US5020077 Modem and data communication system |
| 05/28/1991 | US5020076 Hybrid modulation apparatus |
| 05/28/1991 | US5020075 Direct sequence spread spectrum modulation apparatus |
| 05/22/1991 | EP0428226A2 Receiver with direct quadrature sampling of the input signal |
| 05/22/1991 | EP0428099A2 A digital radio link system and a method of adjusting the transmission power in a digital radio link system |
| 05/22/1991 | EP0427951A2 System to generate switching criteria and equalize adaptively in data spectrum |
| 05/21/1991 | US5017893 Microwave modulator |
| 05/21/1991 | US5017883 Multiple symbol differential detection |
| 05/16/1991 | WO1991007831A1 A method of determining sampling time points |
| 05/16/1991 | WO1991007016A1 A phase locked loop for producing a reference carrier for a coherent detector |
| 05/15/1991 | EP0427283A2 Fast PSK carrier recovery in a mobile satellite communication network |
| 05/14/1991 | US5016260 Modulator and transmitter |
| 05/14/1991 | US5016259 Low jitter DDFS FSK modulator |
| 05/14/1991 | US5016206 Unique word detection system |
| 05/14/1991 | US5015962 Phase demodulator and its application to an MLS type landing system |
| 05/14/1991 | US5015961 Frequency shift demodulator |
| 05/08/1991 | EP0426560A1 Method and apparatus for digital modulation using in-phase and quadrature components |
| 05/08/1991 | EP0426028A2 Method of bit detection for differentially encoded binary or quaternary PSK signals for differential coherent demodulation |
| 05/07/1991 | US5014285 Frequency shift keying communication system with selectable carrier frequencies |
| 05/07/1991 | US5014283 Arrangement for equalizing and demodulating binary continuous-phase angle-modulated data signals with modulation index 0.5 |
| 05/07/1991 | CA1283956C Clock synchronizing circuit including a voltage controlled oscillator |
| 05/02/1991 | WO1991006149A1 Stabilizing circuit for feedback rf amplifier |
| 04/30/1991 | US5012492 Apparatus and method for detecting a carrier signal |
| 04/30/1991 | US5012491 Preamable detection circuit for digital communications system |
| 04/30/1991 | CA1283710C Interference immune digital modulation receiver |
| 04/30/1991 | CA1283707C Receiver for a phase-shift keyed carrier signal |
| 04/24/1991 | WO1991006166A1 Digital demodulator |
| 04/24/1991 | EP0424009A2 Automatic gain control circuit in a radio telephone receiver |
| 04/24/1991 | EP0423787A2 A multi-frequency signal receiver and a method of detecting the multi-frequency signal |
| 04/24/1991 | EP0423775A2 Receiver capable of removing both intersymbol interference and frequency offset |
| 04/24/1991 | EP0423666A1 Digital non-linearity correction method for a transmission chain, and device for carrying out the method |
| 04/24/1991 | CN1050958A Soft decision decoding with channel equalization |
| 04/23/1991 | US5010585 Digital data and analog radio frequency transmitter |
| 04/17/1991 | EP0422417A2 Apparatus for producing a QPSK signal |
| 04/17/1991 | EP0422027A1 Data transmission method and apparatus by period shift keying (tsk) |
| 04/16/1991 | US5008903 Adaptive transmit pre-emphasis for digital modem computed from noise spectrum |
| 04/16/1991 | US5008900 Subscriber unit for wireless digital subscriber communication system |
| 04/16/1991 | US5008898 Carrier modulating device for a spread spectrum communication device |
| 04/16/1991 | US5008670 Phase/digital conversion method and arrangements for implementing the method |
| 04/16/1991 | US5007697 Fibre optic data coupler |
| 04/16/1991 | CA1283176C Phase comparator |
| 04/14/1991 | WO1991006165A1 Soft decision decoding with channel equalization |
| 04/11/1991 | DE4029478A1 Transmission of data in bus system - using integrated circuit synchronous demodulator comprising time delay shift register and filter |