Patents for H04L 27 - Modulated-carrier systems (89,721)
05/2002
05/02/2002US20020051482 Median weighted tracking for spread-spectrum communications
05/02/2002US20020051441 Voltage offset compensating device of CDMA communication system transmitter
05/02/2002EP1202516A2 Multi tone decoder system
05/02/2002EP1202515A2 Outer code for CSMA systems which use multicarrier transmission
05/02/2002EP1202514A1 Multicarrier GSM receiver
05/02/2002EP1202513A1 Universal modem
05/02/2002EP1202512A2 Frequency synchroniser which uses both analogue and digital control signals
05/02/2002EP1201066A1 Phase noise and additive noise estimation in a qam carrier recovery circuit
05/02/2002EP1053629B1 Method for processing telephone signals delivered by an analog telephone terminal and data delivered by a data terminal
05/02/2002DE10049988A1 Phase estimation for navigation receiver signals involves correcting output signal of delay-locked loop, estimating phase with coherent PLL, adding coarse phase from incoherent PLL
05/01/2002CN1347603A Method and apparatus for radio reception, and medium
05/01/2002CN1347602A Method and apparatus for transmission, and medium
05/01/2002CN1347600A Method and apparatus for peak limiting in modulator
05/01/2002CN1347599A Quality control method for digital radio transmissions in medium and short wave range
05/01/2002CN1347252A Soft normalizer for channel decoder
05/01/2002CN1347203A 调谐器 Tuner
05/01/2002CN1084089C Improved channel estimation in communication system
04/2002
04/30/2002US6381623 Method for adaptive filter adjustment in a QAM/CAP system
04/30/2002US6381289 Demodulation method in high speed asynchronous time division multiplexed packet data transmission
04/30/2002US6381288 Method and apparatus for recovering data from a differential phase shift keyed signal
04/30/2002US6381268 Methods and device for estimating and correcting clipping in a discrete multi-tone communications system
04/30/2002US6381265 Field programmable modulator-demodulator arrangement for radio frequency communications equipment and method therefor
04/30/2002US6381264 Efficient multipath centroid tracking circuit for a code division multiple access (CDMA) system
04/30/2002US6381263 Receiving method and receiving apparatus
04/30/2002US6381251 Data transmission apparatus and receiving apparatus using orthogonal frequency division multiplex modulation system
04/30/2002CA2075065C Hybrid analog/digital signal processing
04/25/2002WO2002033964A1 Multi-standard channel decoder
04/25/2002WO2002033925A2 Data allocation for multicarrier transmission
04/25/2002WO2002033924A2 Bi-directional vector rotator
04/25/2002WO2002033922A2 Method and device for the recording and processing of signal waves and corresponding method
04/25/2002WO2002033920A1 Dc-offset compensation
04/25/2002WO2002033919A2 Method for generating soft bit information from gray coded signals
04/25/2002WO2002033918A1 Adaptive equaliser
04/25/2002WO2002033875A1 Adaptive modulation for a wireless transmission system
04/25/2002WO2002033842A2 Transformerless interface for modem
04/25/2002WO2002033820A1 Communications systems
04/25/2002WO2002033817A1 Method and device for detecting and processing signal waves
04/25/2002WO2001095580A3 Mitigation of radio frequency interference in multicarrier transmission
04/25/2002WO2001095579A3 Packet configuration for interoperability between 802.11a and 802.11b standards
04/25/2002WO2001076118A3 Transmission of stationary signals in quiescent mode
04/25/2002US20020049581 Physical medium dependent sub-system with shared resources for multiport xDSL system
04/25/2002US20020049075 Multiband portable radio terminal
04/25/2002US20020049044 Phase-linear wide band frequency conversion
04/25/2002US20020048334 Bit allocation method and apparatus therefor
04/25/2002US20020048328 Clock regenerator for use in demodulating digital modulated signals
04/25/2002US20020048325 Digital down-converter
04/25/2002US20020048316 Rach receiving apparatus
04/25/2002US20020048314 Noise shaping technique for spread spectrum communications
04/25/2002US20020048287 System and method of disharmonic frequency multiplexing
04/25/2002US20020047732 Peak-hold circuit with variable time constant
04/25/2002DE10112974A1 Multi-frequency tone detector computes input signal total energy, detects presence/absence of tone frequencies, sorts tone frequencies of interest by tone energy using signal-to-noise ratio
04/25/2002DE10050330A1 Signal strength compensation device for mobile radio receiver uses mean value of signal strength for previously received data symbols
04/25/2002DE10048352A1 Verfahren zur Übertragung eines hochfrequenten binären Datenstroms über eine Kommunikationsstrecke mit galvanischer Trennung Method for transmitting a high-frequency binary data stream over a communication link with galvanic isolation
04/24/2002EP1199859A2 Apparatus and method for generating transmission and reception local oscillation signals in a mobile terminal
04/24/2002EP1199830A2 Modification of constellation for pilot signals
04/24/2002EP1199817A1 Transmission system of high speed signal in apparatus
04/24/2002EP1199814A1 Radio device with distortion compensation
04/24/2002EP1199799A2 Signal compensator circuit and demodulator circuit
04/24/2002EP1199796A1 Frequency Converter
04/24/2002EP1198938A1 Fading resistant multi-level qam receiver
04/24/2002EP1198937A1 Pulse shaping device for mobile communication systems
04/24/2002EP1198928A1 Data communication device
04/24/2002EP1198916A1 Method and system for generating a power control metric in an orthogonal transmit diversity communication system
04/24/2002EP1198897A1 Crest factor compensated driver
04/24/2002EP1042870B1 Coding method and apparatus
04/24/2002EP1020058B1 Pilot signal search method
04/24/2002EP0835593B1 Code division multiple access (cdma) communication system
04/24/2002CN1346213A Communication system in digital television
04/24/2002CN1346212A 数字电视系统 Digital Television System
04/24/2002CN1346186A Equipment and method for compensation frequency shift in orthogonal FDMS
04/24/2002CN1346185A Apparatus and method for compensating frequency shift in orthogonal frequency division multiple system
04/24/2002CN1083653C Method for quadrature frequency-division multi-=channel sharing, synchronous method, modulator and demodulator
04/24/2002CN1083648C A high-data-rate wireless local-area network
04/24/2002CN1083642C Convolutional interleaver and deinterleaver
04/24/2002CN1083638C Apparatus and method for demodulating modulated signal
04/23/2002US6377683 Low complexity frequency domain echo canceller for DMT transceivers
04/23/2002US6377639 Method, system, and apparatus for unambiguous phase synchronization
04/23/2002US6377634 Circuit for reproducing bit timing and method of reproducing bit timing
04/23/2002US6377631 Transmitter incorporating spatio-temporal processing
04/23/2002US6377630 Transmission circuit
04/23/2002US6377620 Balancing amplitude and phase
04/23/2002US6377616 Calibration of n-port receivers
04/23/2002CA2088750C Linearized output control of a nonlinear amplifier
04/19/2002CA2358643A1 Phase-linear wide band frequency conversion
04/18/2002WO2002032175A1 Radio communication system, transmission control apparatus and transmission control method
04/18/2002WO2002032083A1 Data communication quality control system, transmitter system and receiver
04/18/2002WO2002032082A1 Data communication speed control system, transmitter apparatus and receiver apparatus
04/18/2002WO2002032067A1 Method for automatic frequency control
04/18/2002WO2002032066A2 Mode controller for signal acquisition and tracking in an ultra wideband communication system
04/18/2002WO2002032065A1 Channel estimate predicted from several previous channel estimates, for pre-equalization
04/18/2002WO2002032015A1 Baseband phase estimation technique for demodulation of overlap ping packets
04/18/2002WO2002031998A2 Wavelet receiver with removal of dc offset
04/18/2002WO2002031992A2 Signal strength compensation for mobile radio channels that considerably vary with time
04/18/2002WO2002031990A2 Interference mitigation in wireless communications by training of interfering signals
04/18/2002WO2002031988A2 Ultra wide bandwidth noise cancellation mechanism and method
04/18/2002WO2002031986A2 Generation of wavelets for data transmission
04/18/2002WO2002031985A2 Systems and methods for communicating spread spectrum signals using variable signal constellations
04/18/2002WO2002031963A2 Modulator using a phase-locked loop
04/18/2002WO2002011331A3 Scalable pattern methodology for multi-carrier communication systems
04/18/2002WO2001099305A3 Ultra wide band transmitter