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)
06/1998
06/04/1998WO1998024211A1 Modulation signal calibration between modem and radio using loopback
06/04/1998WO1998024210A1 Carrier phase synchronization by reverse playback
06/04/1998WO1998024209A1 Method in digital quadrature modulator and demodulator, and digital quadrature modulator and demodulator
06/04/1998WO1998024204A2 Method of measuring frequency difference, and receiver
06/04/1998WO1998024202A2 Apparatus and method for block phase estimation
06/04/1998WO1998024201A1 Method and device for mixed analog and digital broadcast of a radio programme broadcast by the same transmitter
06/04/1998WO1998010556A3 Improvements in, or relating to, multi-carrier transmission systems
06/04/1998WO1998010555A3 Improvements in, or relating to, multi-carrier transmission systems
06/04/1998WO1998010548A3 Improvements in, or relating to, multi-carrier transmission systems
06/04/1998WO1998010546A3 Improvements in, or relating to, multi-carrier transmission systems
06/04/1998CA2272560A1 Carrier phase synchronization by reverse playback
06/04/1998CA2272070A1 Adaptive channel allocation method and apparatus for multi-slot, multi-carrier communication system
06/03/1998EP0845891A2 A windowing technique for blind equalisation
06/03/1998EP0845888A2 Method and apparatus for a unique word differential detection and demodulation using the unique word differential detection
06/03/1998EP0845885A2 Modulated signal generation apparatus for a digital communication system incorporating fading simulator
06/03/1998EP0845185A1 Digital transmission system
06/03/1998EP0845178A1 Synchronisation method
06/03/1998EP0845176A1 Dynamic allocation of bandwidth for transmission of audio signals and a video signal
06/03/1998CN1183864A Balance companded delta conversion for homodyne receiver
06/03/1998CN1183672A Wideband vector modulator
06/02/1998US5761615 Wide band zero if quadrature demodulator using a intermediate frequency and a single local oscillator
06/02/1998US5761259 Apparatus, method and article of manufacture for carrier frequency compensation in a FM radio
06/02/1998US5761251 Dual automatic gain control and DC offset correction circuit for QAM demodulation
06/02/1998US5761250 Iterative filtering frequency estimator and estimation method
06/02/1998US5761217 Method for recovering errors with data communication
06/02/1998US5761210 Signal processing apparatus and method
06/02/1998US5761196 Code division multiple access (CDMA) inbound messaging system utilizing re-use of sequences
06/02/1998US5761190 OFDM broadcast wave receiver
06/02/1998US5760645 Demodulator stage for direct demodulation of a phase quadrature modulated signal and receiver including a demodulator stage of this kind
05/1998
05/28/1998WO1998023073A1 Coded modulation for fading channels
05/28/1998WO1998023072A1 Method and apparatus for constant envelope quadrature-quadrature amplitude modulation
05/28/1998WO1998023071A1 A programmable loop filter for carrier recovery in a radio receiver
05/28/1998WO1998023070A1 Passband dqpsk detector for a digital communications receiver
05/28/1998WO1998023069A1 An improved phase detector for carrier recovery in a dqpsk receiver
05/28/1998WO1998023068A1 Transmitter
05/28/1998WO1998023042A1 Verification of pn synchronization in a spread-spectrum communications receiver
05/28/1998WO1998023036A1 A carrier-recovery loop with stored initialization in a radio receiver
05/27/1998EP0844765A2 Multicarrier receiver with an antenna array
05/27/1998EP0844759A1 Artificial fading for frequency offset mitigation
05/27/1998EP0843932A2 A receiver, a demodulator, and a demodulation method
05/27/1998EP0714575A4 Method and apparatus for creating a composite waveform
05/27/1998CN1183192A Adaptive filter for use in a TDM/TDMA receiver
05/27/1998CN1183179A Slope, drift and offset compensation in zero-if receivers
05/27/1998CN1183010A Selective calling radio signal receiving method and equipment
05/26/1998US5757893 Modem apparatus comprising ringing signal detector for outputting detection signal to modem circuit in response to instruction data from computer
05/26/1998US5757867 Digital mixing to baseband decimation filter
05/26/1998US5757865 Carrier phase control circuit
05/26/1998US5757864 Receiver with filters offset correction
05/26/1998US5757863 Apparatus for decoding a signal encoded by using trellis coded modulation
05/26/1998US5757862 Demodulator, modulation and demodulation system, and demodulation method
05/26/1998US5757861 Apparatus for correcting phase error of VSB signal
05/26/1998US5757858 Dual-mode digital FM communication system
05/26/1998US5757856 Differential coder and decoder for pragmatic approach trellis-coded 8-PSK modulation
05/26/1998US5757850 Transmission bit rate discrimination method and apparatus
05/26/1998US5757849 Timing recovery in a network-synchronized modem
05/26/1998US5757847 Method and apparatus for decoding a phase encoded signal
05/26/1998US5757821 Method and apparatus for detecting communication signals having unequal error protection
05/26/1998US5757766 Transmitter and receiver for orthogonal frequency division multiplexing signal
05/26/1998US5757531 Gils for heterodyne receiver having low intermediate frequency
05/26/1998US5757245 Circuit for 2-level/4-level frequency shift key modulation
05/26/1998CA2078636C Demodulator for continuously and accurately carrying out demodulating operation by a frequency multiplication method
05/22/1998WO1998021861A1 Prototype signal construction for multicarrier transmission
05/22/1998WO1998021860A1 Method for decoding complementary codes
05/22/1998WO1998021849A1 Method for suppressing interference signals during transmission of digital signals
05/22/1998WO1998010552A3 Improvements in, or relating to, multi-carrier transmission systems
05/22/1998WO1998010549A3 Improvements in, or relating to, multi-carrier transmission systems
05/20/1998EP0843448A1 Estimation and correction of modulation faults
05/20/1998EP0843447A1 Method for the transmission of asynchronous NRZ signals using frequency modulation
05/20/1998EP0843444A2 Digital communication system using a trellis based, reduced state estimation method
05/20/1998EP0843430A2 Technique for simultaneous transmission of analog frequency-modulated and digitally modulated signals using postcanceling method
05/20/1998EP0843394A1 Ignition device for internal combustion engine
05/20/1998EP0843254A2 Integrated digital signal processor/general purpose CPU with shared internal memory
05/20/1998EP0842566A2 A receiver, a demodulator, and a demodulation method
05/20/1998EP0614587B1 Demodulation method using quadrature modulation
05/20/1998DE19646746A1 Übertragungsverfahren zur drahtlosen Kommunikation mit einem implantierten medizinischen Gerät A transmission method for wireless communication with an implanted medical device
05/20/1998DE19646745A1 Übertragungsverfahren und Anordnung zur Durchführung des Verfahrens Transmission method and arrangement for performing the method
05/20/1998CN1182320A DQPSK mapping circuit
05/19/1998US5754950 Method and apparatus for combining signals
05/19/1998US5754946 Nationwide communication system
05/19/1998US5754597 Method and apparatus for routing a digitized RF signal to a plurality of paths
05/19/1998US5754595 Demodulated radio signals
05/19/1998US5754591 System for, and method of, processing quadrature amplitude modulated signals
05/19/1998US5754589 Noncompressed voice and data communication over modem for a computer-based multifunction personal communications system
05/19/1998US5754588 Radio modem
05/19/1998US5754587 Method and apparatus for bias suppression in a VCO based FM transmission system
05/19/1998US5754585 Method and apparatus for serial noncoherent correlation of a spread spectrum signal
05/19/1998US5754584 Non-coherent spread-spectrum continuous-phase modulation communication system
05/19/1998CA2221371A1 Method and apparatus for constant envelope quadrature-quadrature amplitude modulation
05/14/1998WO1998020689A1 Apparatus and method for reducing low-frequency distortion in frequency converted signals
05/14/1998WO1998020657A1 A method and system for quadrature modulation and digital-to-analog conversion
05/14/1998WO1998020630A1 Direct satellite direct broadcast system
05/14/1998WO1998020625A1 Method for wireless information transfer
05/14/1998WO1998020624A1 Method of transmission and device to carry out said method
05/14/1998WO1998020607A1 Frequency modulator
05/14/1998WO1998019591A1 Method for wireless communication transfer with an implanted medical device
05/14/1998WO1998000946A3 Timing and frequency synchronization of ofdm signals
05/14/1998DE19646299A1 Verfahren zur Decodierung von komplementären Codes A method for decoding codes of complementary
05/14/1998DE19646164A1 Verfahren zur Übertragung digitaler Signale Method for transmitting digital signals
05/14/1998CA2270134A1 Digital satellite direct broadcast system
05/14/1998CA2218925A1 Quadrature modulator operating defect estimator and modulation stage using this estimator
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