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)
09/2003
09/23/2003US6624691 Demodulator for processing digital signal
09/23/2003CA2100153C Apparatus for time division multiplexed processing of frequency division multiplexed signals
09/18/2003WO2003077497A1 Carrier wave reproduction apparatus
09/18/2003WO2003077496A1 Frequency-dependent magnitude pre-distortion for reducing spurious emissions in communication networks
09/18/2003WO2003077495A1 Frequency-dependent magnitude pre-distortion of non-baseband input signals for reducing spurious emissions in communication networks
09/18/2003WO2003077494A1 Eer (envelope elimination and restoration) technology transmission amplifier
09/18/2003WO2003077492A1 Multicarrier pilot allocator
09/18/2003WO2003077491A1 Antenna signal processing systems
09/18/2003WO2003077489A1 Resonant power converter for radio frequency transmission and method
09/18/2003WO2003077457A1 Systems and methods for high rate ofdm communications
09/18/2003WO2003077445A1 Doppler shift and spread estimation method and apparatus
09/18/2003WO2003077430A2 Method and apparatus for generating frequency-stable wavelets
09/18/2003WO2003077426A1 Bit liklihood calculation method and demodulation device
09/18/2003WO2003077419A1 Finite impulse response filter and digital signal receiving apparatus
09/18/2003WO2003056774A8 Qam multiresolution system with automatic repeat request for each data stream_________________
09/18/2003WO2003047091A3 A data processing circuit
09/18/2003WO2003026236A3 Adaptive equalizer which is independent of the amplitude of the transmited signal
09/18/2003US20030176161 Downstream adaptive modulation in DOCSIS based communications systems
09/18/2003US20030174790 Method and apparatus for frequency offset estimation, and system utilizing same
09/18/2003US20030174788 Adaptive receiver for multiplex/multi-access communications
09/18/2003US20030174785 Method and apparatus of 8PSK modulation
09/18/2003US20030174783 Self calibrating transmit path correction system
09/18/2003US20030174765 Method of and a device for generating a signal having a predetermined quality criterion for use in or on a communication system
09/18/2003US20030174643 Method and apparatus for allocating a pilot carrier adaptively in an orthogonal frequency division multiple access system
09/18/2003US20030174079 Feed-forward DC-offset canceller for direct conversion receiver
09/18/2003US20030174048 Method and system for performing distance measuring and direction finding using ultrawide bandwidth transmissions
09/18/2003US20030174026 Frequency modulator, frequency modulating method, and wireless circuit
09/18/2003US20030174016 High-efficiency circuit for demodulating carriers in quadrature
09/18/2003DE10066103C2 Sende/Empfangsschaltung Send / receive circuit
09/18/2003CA2743822A1 Systems and methods for high rate ofdm communications
09/17/2003EP1345375A2 Method and apparatus for frequency modulation
09/17/2003EP1345349A2 Downstream adaptive modulation in DOCSIS-based communicaations systems
09/17/2003EP1344366A2 Method and device for transmitting data on at least one electrical power supply line
09/17/2003EP1344365A2 Ofdma with adaptive subcarrier-cluster configuration and selective loading
09/17/2003EP1344364A2 Equalisation and subcarrier suppression
09/17/2003EP1344363A1 Method of detecting pilot tones in a noisy signal
09/17/2003EP1344342A2 Broadcast system using a subgroup of subcarriers to transmit personalized data between base stations and subscriber units
09/17/2003EP1344341A2 Encoded qam
09/17/2003EP1344339A1 Multiple access frequency hopping network with interference avoidance
09/17/2003EP1344325A1 Radio transmission device and method for aligning parameters thereof
09/17/2003EP1258077B1 Circuit configuration for direct modulation
09/17/2003CN1443416A Method of applying quadature amplitude modulation to radio mobile communication system
09/17/2003CN1443415A Viterbi equalization using precalculated metrics increments
09/17/2003CN1443407A Scalable pattern method for multi-carrir comunication systems
09/17/2003CN1442986A I/Q demodulator and its I/Q signal sampling method
09/17/2003CN1442971A Mobile communication system, channel synchronous establishing method and mobile station
09/17/2003CN1121772C Radio transmitter
09/16/2003US6622282 Trellis coding with one-bit constellations
09/16/2003US6621945 Modulation scheme for NRZ signals and transmitter
09/16/2003US6621880 Digital IF receiver
09/16/2003US6621879 Digital radio system, a digital radio device, and a quadrature demodulator
09/16/2003US6621876 System and method to reduce phase modulation bandwidth
09/16/2003US6621874 Method and radio station for data transmission
09/16/2003US6621863 Equalizing apparatus combining amplitude error with squared envelope error according to variable weights
09/16/2003US6621857 Carrier tracking loop for direct sequence spread spectrum systems
09/16/2003US6621831 Method and apparatus for verifying and correcting connectivity
09/16/2003US6621527 Digital receiver with match filter responsive to field synchronization code in the final I-F signal envelope
09/16/2003US6621436 Delta sigma type AD converter having band pass filter transmission functionality
09/16/2003US6621367 Signal power dynamic range compressing circuit and power amplifier using the same
09/16/2003US6621350 Switched supply for operational amplifier
09/16/2003US6621346 Impedance matching for programmable gain amplifiers
09/16/2003US6621345 Gain control device for packet signal receiver
09/16/2003US6621332 Demodulator and demodulation method of DQPSK system with reduced circuit scale
09/16/2003CA2263775C Simply-constructed digital radio communication system capable of changing transmission capacity mode
09/16/2003CA2262882C Frequency lock indicator for fpll demodulated signal having a pilot
09/16/2003CA2257238C Dc offset compensation method and apparatus
09/12/2003WO2003075529A1 Modulator/transmitter apparatus and method
09/12/2003WO2003075510A1 System and method for communicating data during an audio conference
09/12/2003WO2003075509A1 System and method for dynamically establishing optimum audio quality in an audio conference
09/12/2003WO2003075500A2 Hierarchical preamble constructions for ofdma based on complementary sequences
09/12/2003WO2003075476A1 Transmission system
09/12/2003WO2003075471A2 System and method for joint maximal ratio combining
09/12/2003WO2003075470A2 Systems and methods for improving range for multicast wireless communication
09/12/2003WO2003075469A2 System and method for antenna diversity using equal power joint maximal ratio combining
09/12/2003WO2003075457A2 Apparatus and method for reducing peak-to-average signal power ratio
09/12/2003WO2003075449A2 Method and apparatus for transient frequency distortion compensation
09/12/2003WO2003075396A2 System and method for antenna diversity using joint maximal ratio combining
09/12/2003WO2003075151A1 Device and method for performing multiple modulus conversion using inverse modulus multiplication
09/12/2003WO2003075130A2 System and method for communication channel and device control via an existing audio channel
09/12/2003WO2003067841A3 Multi-standard transmitter and method for a wireless communication system
09/12/2003WO2003055161B1 Method and apparatus for amplitude modulating data signals using a square wave signal
09/12/2003WO2003047198A3 Rate selection for an ofdm system
09/12/2003WO2003043284A3 Slicer circuit with ping pong scheme for data communication
09/12/2003WO2003043206A3 Emission device with automatic compensation of the quadrature modulator
09/12/2003WO2003041367A3 Method and device for xdsl data transmission with an optimised current consumption
09/12/2003WO2003036819A3 Detection and classification of signals utilizing known repeated training sequences
09/12/2003WO2003026240A3 Method for transmitting data by multi-carrier modulation
09/12/2003WO2002037666A3 Iq modulator
09/12/2003CA2477883A1 Hierarchical preamble constructions for ofdma based on complementary sequences
09/12/2003CA2445055A1 Device and method for performing multiple modulus conversion using inverse modulus multiplication
09/11/2003US20030172338 Transmission apparatus and transmission method with simplified rate conversion
09/11/2003US20030171128 Frame synchronization device, communication terminal apparatus using this device and frame synchronization method
09/11/2003US20030171102 Automatic frequency correction for mobile radio receivers
09/11/2003US20030169830 Method and apparatus for modulation using an at least four-dimensional signal constellation
09/11/2003US20030169829 Frequency-dependent magnitude pre-distortion of non-baseband input signals for reducing spurious emissions in communication networks
09/11/2003US20030169828 Method and apparatus for generating frequency-stable wavelets
09/11/2003US20030169825 Signal processor and method for the system-independent digital generation of mobile communication transmit signals of different mobile radio standards
09/11/2003US20030169823 Efficient FFT implementation for ADSL
09/11/2003US20030169809 Method for determining coefficients of an equalizer and apparatus for determining the same
09/11/2003US20030169808 Isolator and a modem device using the isolator
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