Patents for H04L 27 - Modulated-carrier systems (89,721)
03/2002
03/28/2002WO2002025882A1 Quadrature processed lidar system
03/28/2002WO2002025881A1 Method for frequency acquisition, especially for initial frequency acquisition, of a mobile communications device
03/28/2002WO2002025857A1 Cyclic delay diversity for mitigating isi in ofdm systems
03/28/2002WO2002025835A1 Receiver and adaptive equalizing method
03/28/2002WO2002025830A1 Receiver structure in a digital spread spectrum communication system
03/28/2002WO2002025814A1 Line driver with output impedance synthesis
03/28/2002WO2002025804A2 Calibration of a quadrature receiver
03/28/2002WO2001093433A3 Method and apparatus for generating a short-range wireless data communication link
03/28/2002WO2001078496A3 Method of modulation selection in a communication system
03/28/2002WO2001078495A3 Method of modulation selection and decoding
03/28/2002WO2001052441A3 Broadcast system using a subgroup of subcarriers to transmit personalized data between base stations and subscriber units
03/28/2002WO2001048910A3 Transmitter for transmitting signals over radio channels and method for transmitting signals over radio channels
03/28/2002US20020038409 Digital signal processor and modem using the same
03/28/2002US20020037706 Baseband circuit incorporated in direct conversion receiver free from direct-current offset voltage without change of cut-off frequency
03/28/2002US20020037063 Demodulation method
03/28/2002US20020037060 Digital down-converter and receiver
03/28/2002US20020037058 Frequency-domain equalizer for terrestrial digital TV reception
03/28/2002US20020037056 Communication system in digital televison
03/28/2002US20020037055 System and method of data communication using trellis coded modulation or turbo trellis coded modulation in combination with constellation shaping with or without precoding when using concatenated coding schemes or when working in a non-error free operation point
03/28/2002US20020037034 Resource-constrained turbo-equalization
03/28/2002US20020037032 Demodulation method
03/28/2002US20020037027 Apparatus and methods for sample selection and reuse of rake fingers in spread spectrum systems
03/28/2002US20020036998 Adaptive vector correlator for spread-spectrum communications
03/28/2002US20020036996 Initial power control for spread-spectrum communications
03/28/2002DE10045761A1 Modulation circuit has phase modulator stage driving end stage directly or via power control stage, digital amplitude signal generation stage connected to end stage or power control stage input
03/28/2002CA2391905A1 Radio transmission apparatus and transmission signal mapping method
03/27/2002EP1191774A2 Modem and a method for controlling the same
03/27/2002EP1191713A1 Communication terminal apparatus and demodulation method
03/27/2002EP1191709A1 Spread spectrum receiving apparatus
03/27/2002EP1191708A1 Training and synchronization sequences for wireless systems with multiple transmit and receive antennas used in CDMA or TDMA systems
03/27/2002EP1191705A2 Method and apparatus for correcting frequency offset and storage medium storing control program therefor
03/27/2002EP1191704A2 Method and apparatus for acquiring slot timing and frequency offset correction
03/27/2002EP1191703A1 Receiver structure in a digital communication system
03/27/2002EP1191699A1 Parallel concatenated trellis-coded modulation with asymmetric signal mapping
03/27/2002EP1191689A2 Method and apparatus for adjusting reference frequency
03/27/2002EP1191681A2 Signal source with a polyphase filter
03/27/2002EP1190560A1 Low-rate speech coder for non-speech data transmission
03/27/2002EP1190544A1 Phase error detector for a quadrature amplitude modulated (qam) receiver
03/27/2002EP1190513A1 Method and apparatus for determining transmission mode and synchronization for a digital audio broadcasting signal
03/27/2002EP1190507A1 Receiver for two orthagonally polarised signals
03/27/2002EP1190295A1 Digital synthesizer with coherent division
03/27/2002EP0797878B1 Ofdm with variable subcarrier allocation
03/27/2002CN1342346A Spread-spectrum communication device
03/27/2002CN1342313A Digital audio interface signal demodulating device
03/27/2002CN1342010A Method using synchronous signal to control equalizer in digital residual sideband system and its device
03/27/2002CN1342003A Bit rate detecting circuit and calculating method for optical network
03/27/2002CN1081866C Modulator demodulator unit
03/27/2002CN1081860C Synchronization device for digital communications
03/26/2002US6363131 Method and apparatus for joint timing synchronization and frequency offset estimation
03/26/2002US6363128 Multi-carrier transmission systems
03/26/2002US6363127 Automatic gain control methods and apparatus suitable for use in OFDM receivers
03/26/2002US6363126 Demodulator
03/26/2002US6363125 Non-coherent six-port receiver
03/26/2002US6363124 Phase-noise compensated digital communication receiver and method therefor
03/26/2002US6363121 Wireless transmission method for antenna arrays using unitary space-time signals
03/26/2002US6363110 Methods and device for estimating and correcting clipping in a discrete multi-tone communications system
03/26/2002US6363109 Methods and device for estimating and correcting clipping in a discrete multi-tone communications system
03/26/2002US6363106 Method and apparatus for despreading OQPSK spread signals
03/26/2002US6363103 Multistage interference cancellation for CDMA applications using M-ary orthogonal moduation
03/26/2002US6363102 Method and apparatus for frequency offset correction
03/26/2002US6363100 Radio data communication system using spread spectrum scheme
03/26/2002US6363084 Method for estimating coarse frequency offset in OFDM receiver and apparatus employing the same
03/26/2002US6362701 Digital communications modulator having an interpolator upstream of a linearizer and method therefor
03/26/2002CA2264470C Timing recovery system
03/26/2002CA2059976C Method and apparatus for the transmission and reception of a multicarrier digital television signal
03/21/2002WO2002023850A2 Multicarrier receiver
03/21/2002WO2002023849A2 Signaling method in an ofdm multiple access system
03/21/2002WO2002023848A2 Power amplification in multicarrier transmitters
03/21/2002WO2002023847A1 Method for an adaptive bitloading in an ofdm-based communication system
03/21/2002WO2002023846A2 Dial tone detector
03/21/2002WO2002023844A2 Method and orthogonal frequency division multiplexing (ofdm) receiver for reducing the influence of harmonic interferences on ofdm transmission systems
03/21/2002WO2002023843A1 Method for the generation of mobile communication signals of various mobile radio standards
03/21/2002WO2002023841A1 Method for optimal estimation of a propagation channel relying solely on pilot symbols and corresponding estimator
03/21/2002WO2002023839A2 Active terminating device with optional line-receiving and line-driving capabilities
03/21/2002WO2002023800A1 Phase modulator and phase modulating method
03/21/2002WO2002023781A1 Communication system using ofdm
03/21/2002WO2002023746A2 Method for system-independent digital evaluation of mobile communication reception signals of various mobile radio standards
03/21/2002WO2001091393A3 Method for synchronising ofdm symbols during radio transmissions
03/21/2002WO2001089092A3 Apparatus for radio frequency processing with dual modulus synthesizer
03/21/2002WO2001082545A3 Device and method for signal sampling at multiple clock rates
03/21/2002WO2001076167A3 Sequential quadrant demodulation of digitally modulated radio signals
03/21/2002WO2001061907A3 Calibration system for a communications system
03/21/2002WO2001041381A3 Gaussian filtered fsk modulator that includes a gaussian filter, an integrator and a look-up table
03/21/2002US20020035505 Mobile communication method and apparatus using backscattering of carrier
03/21/2002US20020034933 Semiconductor apparatus and portable terminal apparatus
03/21/2002US20020034294 Low voltage broadband line driver
03/21/2002US20020034267 System for near optimal joint channel estimation and data detection for COFDM systems
03/21/2002US20020034266 Demodulator for demodulating digital modulated signals
03/21/2002US20020034265 Semi-NDA frequency correction at the receiving end in a packet transmission system
03/21/2002US20020034262 Removal of clock related artifacts from an offset QAM generated VSB signal
03/21/2002US20020034261 Rate n/n systematic, recursive convolutional encoder and corresponding decoder
03/21/2002US20020034260 Adaptive predistortion transmitter
03/21/2002US20020034214 OFDM receiving device and OFDM receiving method
03/21/2002US20020034213 Channel estimator for OFDM system
03/21/2002US20020034196 Systems and methods for transporting a network timing reference in an ADSL system
03/21/2002US20020034192 Modem and a method for controlling the same
03/21/2002US20020034191 Method and apparatus for transmitting and receiving signals having a carrier interferometry architecture
03/21/2002US20020034169 Apparatus for adaptive reverse power control for spread-spectrum communications
03/21/2002US20020034167 Method for adaptive forward power control for spread-spectrum communications
03/21/2002US20020034161 Method and apparatus for channel estimation