Patents
Sitemap › H04 - Electric communication technique › H04L - Transmission of digital information, e.g. telegraphic communication › H04L 27 - Modulated-carrier systems
Patents for H04L 27 - Modulated-carrier systems (89,721)
11/1983
11/15/1983CA1157101A1 Coherent receiver for angle-modulated data signals
11/10/1983WO1983003938A1 Frequency-encoding circuit for reducing distortion
11/09/1983EP0093651A1 Multiple-carrier receiver protected against jamming
11/09/1983EP0093614A2 Frequency-encoding circuit for reducing distortion
11/09/1983EP0020783B1 Phase correction circuit for a phase modulation system
11/08/1983US4414675 MSK and OK-QPSK signal demodulator
11/01/1983CA1156334A1 Textile machine data link apparatus
10/1983
10/26/1983EP0092474A1 Demodulation filter for a binary frequency-modulated signal
10/26/1983EP0092442A2 Phase synchronizing circuit
10/25/1983US4412341 Interference cancellation method and apparatus
10/25/1983US4412339 Zero-crossing interpolator to reduce isochronous distortion in a digital FSK modem
10/25/1983US4412338 Frequency shift keyed detector system
10/25/1983US4412302 Digital phase demodulation and correlation
10/25/1983US4412181 Process for the demodulation of an amplitude modulated signal and demodulator performing this process
10/18/1983US4411005 Data circuit for frequency modulating an oscillator
10/18/1983US4410762 Dual mode tone detector circuit
10/18/1983CA1155569A1 High speed modem suitable for operating with a switched network
10/12/1983EP0091167A1 Method of correcting the frequency of the local carrier in the receiver of a data transmission system, and receiver utilizing this method
10/11/1983US4409594 Apparatus for performing radio frequency pulse modulation with automatic modulation control
10/11/1983US4409562 Phase correction circuit employing bandpass filters
10/11/1983CA1155182A1 Phase-jitter compensation using periodic harmonically related components
10/05/1983EP0090462A2 Demodulator circuit
10/05/1983EP0090134A1 Programmable fine frequency detector
09/1983
09/27/1983US4406924 Radio-controlled devices for use in power distribution circuits
09/27/1983CA1154514A1 Method of synchronizing a quadphase receiver and a clock synchronization device for carrying out the method
09/21/1983EP0089088A1 FM receiver for receiving FM signals with transmission identification
09/21/1983EP0088862A1 System for the transmission of an impulse telegram with a high Baud rate over lines of a low-voltage energy supply network
09/21/1983EP0088832A1 Compression bandage
09/21/1983EP0088830A1 Infrared telecommand receiver
09/20/1983US4406009 Method and apparatus for converting binary information into a single-sideband 3-level correlative signal
09/20/1983US4405837 Tone detector circuit
09/13/1983US4404532 Modulator having improved bandwidth and power requirements
09/13/1983CA1153820A1 Soft quantizer for fm radio binary digital signaling
09/07/1983EP0088020A1 Digital multilevel modulator with compensation of the direct current component
09/06/1983US4403331 Method and apparatus for transmitting data over limited bandwidth channels
09/06/1983US4403111 Apparatus for interconnecting data communication equipment and data terminal equipment
08/1983
08/30/1983US4402090 Communication system in which data are transferred between terminal stations and satellite stations by infrared signals
08/30/1983CA1153119A1 Signal receiving apparatus and method
08/24/1983EP0086586A1 Radio frequency alternate-path phase switch
08/24/1983EP0086482A2 Digital signal communication system
08/23/1983CA1152596A1 Equalizer sample loading in voiceband data sets
08/17/1983EP0086091A2 Apparatus and method for signal processing
08/16/1983USRE31351 Feedback nonlinear equalization of modulated data signals
08/10/1983EP0085614A2 Data transmitting-receiving system
08/10/1983EP0085515A1 Encoder apparatus for transmitting binary data and transmitting and receiving apparatus
08/10/1983EP0085356A1 Circuit arrangement for the adaptive equalization of diversity troposcatter links
08/10/1983EP0085337A2 Digital telecommunication system
08/03/1983EP0084787A1 System for the transmission of digital information signals
08/02/1983US4397039 Instantaneous phase tracking in single sideband systems
08/02/1983CA1151246A1 Method and device for training an adaptive equalizer by means of an unknown data signal in a transmission system using double sideband-quadrature carrier modulation
07/1983
07/27/1983EP0084461A1 Method of and apparatus for detecting the presence of a frequency shift keyed signal
07/26/1983CA1150783A1 Programmable multifrequency tone receiver
07/20/1983EP0083895A1 Microwave circuit acting as modulator, mixer and transmission-reception separator and devices using such a circuit
07/19/1983US4394626 Phase synchronizing circuit
07/19/1983CA1150370A1 Phase locked loop for demodulating single sideband signals
07/19/1983CA1150360A1 Radio system
07/12/1983US4393514 Superregenerative receiver
07/06/1983EP0083236A1 Carrier recovery circuit
07/05/1983US4392233 Method of filtering electromagnetic waves and dual channel audio code filter therefor
07/05/1983US4392232 Simplified transversal correlator for MSK and MSK related waveforms
07/05/1983CA1149529A1 Digital data transmission system
06/1983
06/29/1983EP0082687A2 Railway signalling receiver
06/29/1983EP0082575A1 An energy-synchronised demodulator circuit
06/28/1983US4390980 Demultiplexing plural data streams
06/28/1983US4390863 System for the transmission of binary signals between the components of an alarm system
06/28/1983CA1149022A1 Carrier detector in a modem provided with an echo canceler
06/23/1983WO1983002207A1 Digital coherent psk demodulator and detector
06/22/1983EP0035992B1 Data transmission arrangement
06/21/1983US4389727 Method for controlling the clock phase of a receiving system for digital data, phase recovery circuit for effectuating this method and digital data receiving system comprising said circuit
06/21/1983US4389644 Asynchronous type multichannel signal processing system
06/21/1983US4389622 System for preventing transient induced errors in phase locked loop
06/21/1983US4389616 Method and arrangement for the digital regulation of the carrier phase error in receivers of data transmission systems
06/21/1983CA1148621A1 Method and arrangement for the digital regulation of the carrier phase in receivers of data transmission systems
06/14/1983US4388730 Noise detector and data signal receiver for a frequency modulation system
06/14/1983US4388727 Receivers suitable for use in remotely-operable switching devices and data transmission systems
06/14/1983US4388726 System for the ultra-high frequency transmission of numerical data
06/14/1983US4388595 Apparatus and method for removing bias distortion from a product demodulator
06/08/1983EP0080544A1 Method for receiving a data signal with double side-band quadrature carrier modulation
06/07/1983US4387342 Phase-shift keyed decoder
06/07/1983CA1147840A2 Method and apparatus for demodulating signals in a logging while drilling system
06/01/1983EP0080332A2 Timing error correction apparatus and method for QAM receivers
06/01/1983EP0080201A1 Method of and device for passband echo-cancelling for phase-modulated data signals
06/01/1983EP0080157A2 Method and arrangement for demodulating frequency-modulated signals using sampled values
06/01/1983EP0080020A1 Method of determining the optimum sampling instants of a QPSK or QAM reception signal
05/1983
05/26/1983WO1983001879A1 Interference cancellation method and apparatus
05/25/1983EP0079576A2 Circuit recovering the carrier of a signal amplitude and phase modulated by digital signals
05/24/1983US4385208 Multifrequency receiver
05/18/1983EP0078857A1 Digital amplitude modulating circuitry
05/17/1983US4384357 Self-synchronization circuit for a FFSK or MSK demodulator
05/17/1983US4384356 Wide band modem for high speed data transmission
05/17/1983US4384355 Control of coefficient drift for fractionally spaced equalizers
05/17/1983US4384036 Process for producing liquid developer for electrostatic photography using selected solvents
05/17/1983CA1146648A1 Clock recovery circuit for burst communications systems
05/10/1983US4383324 Digital data transmission systems
05/03/1983US4382232 Device for demodulating signals modulated by frequency-shift keying
04/1983
04/26/1983US4381546 System for the quantitative measurement of impairments in the communication channel of a quadrature amplitude modulation data communication system
04/26/1983CA1145401A1 Phase synchronizing circuit for use in multi-level, multi-phase, superposition- modulated signal transmission system
04/20/1983EP0077216A1 Radio system
04/19/1983CA1144999A1 Arrangement for testing a device provided with an echo canceller
04/13/1983EP0076545A1 Transmitter for transmitting an FSK-modulated signal
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