Patents for H04L 27 - Modulated-carrier systems (89,721)
01/2004
01/02/2004EP1376965A1 Multi-path equalization for orthogonal frequency division multiplexing communication system
01/02/2004EP1376921A1 MIMO telecommunication system with accelerated sphere decoding
01/02/2004EP1376890A2 Wireless spread spectrum communication with preamble sounding gap
01/02/2004EP1374519A1 Method of and apparatus for performing amplitude and phase modulation
01/02/2004EP1374518A2 Signal processing of an amplitude-modulated and/or phase-modulated high-frequency signal according to the principle of envelope elimination and restoration
01/02/2004EP1374517A2 Corrector for non-monotonic characteristics of a satellite transmission channel
01/02/2004EP1374516A2 System and method to reduce phase modulation bandwidth
01/02/2004EP1374515A1 Increasing data throughput in optical fiber transmission systems
01/02/2004EP1374514A2 Demodulator for amplitude shift key (ask)-modulated signals
01/02/2004EP1374513A2 Method for frame and frequency synchronization of an ofdm signal and method for transmitting an ofdm signal
01/02/2004EP1374511A2 Bi-directional communication system with echo cancelation
01/02/2004EP1374469A1 Receiver transparent q-mode
01/02/2004EP1374466A1 Coding scheme for a wireless communication system
01/02/2004EP1374462A1 Communication device having proximity controlled transmission
01/02/2004EP1374441A1 QAM with quantised power
01/02/2004EP1374428A2 Transceiver
01/02/2004EP1197064B9 Adsl system for transmission of voice and data signals
01/01/2004US20040003408 Sample rate reduction in data communication receivers
01/01/2004US20040003185 Method and system for synchronizing processor and DMA using ownership flags
01/01/2004US20040002837 Passive impedance network for rotating a phase system
01/01/2004US20040002312 Baseband receiver and method of using same
01/01/2004US20040002308 Wireless communication device
01/01/2004US20040002307 Diversity system and diversity method
01/01/2004US20040001688 Radio frequency data capture
01/01/2004US20040001564 Reduced complexity receiver for space-time- bit-interleaved coded modulation
01/01/2004US20040001563 Robust OFDM carrier recovery methods and apparatus
01/01/2004US20040001562 Average tracking mechanism in data communications receivers
01/01/2004US20040001561 Method and system for the transmission, reception and processing of 4-level and 8-level signaling symbols
01/01/2004US20040001560 Analog FSK modulator for a radio transmitter
01/01/2004US20040001557 Modulation apparatus using mixed-radix fast fourier transform
01/01/2004US20040001555 Method and apparatus for producing and processing sequences of modulation symbols
01/01/2004US20040001554 Antenna signal processing systems
01/01/2004US20040001553 Communication using audible tones
01/01/2004US20040001552 Method for achieving a target bit rate in a multi-carrier data communication system
01/01/2004US20040001541 AGC fine-tuning be the adaptive time domain equalizer
01/01/2004US20040001539 Training using overhead data in a wireless communications network
01/01/2004US20040001535 Modem having a vector-architecture processor, and associated methodology therefor
01/01/2004US20040001464 Method and apparatus for forward link gain control in a power controlled repeater
01/01/2004US20040001448 System and method for transmitting highly correlated preambles in QAM constellations
01/01/2004US20040001430 Method and apparatus for preamble detection and time synchronization estimation in OFDM communication systems
01/01/2004US20040001429 Dual-mode shared OFDM methods/transmitters, receivers and systems
01/01/2004US20040001427 Method and apparatus for adjacent channel interference reduction in an orthogonal frequency division multiplexing (OFDM) receiver
12/2003
12/31/2003WO2004002178A1 Radio communication system
12/31/2003WO2004002103A1 A system and method for wirelessly transmitting and receiving digital data using acoustical tones
12/31/2003WO2004002102A1 A system and method for wirelessly transmitting and receiving digital tokens using acoustic tones
12/31/2003WO2004002101A1 Method and system for receiving a multi-carrier signal
12/31/2003WO2004002100A1 Processing of an ofdm signal
12/31/2003WO2004002098A1 Radio communication apparatus
12/31/2003WO2004002097A1 Digital fsk demodulator
12/31/2003WO2004002095A1 Carrier wave modulation using pulse position modulation
12/31/2003WO2004002035A1 Ofdm receiving apparatus and ofdm signal correcting method
12/31/2003WO2004002011A1 Diversity transmission modes for mimo ofdm communication systems
12/31/2003WO2004001998A1 Ultra-wideband signal receiver using frequency sub-bands
12/31/2003WO2004001984A2 Method and apparatus providing an amplitude independent automatic frequency control circuit
12/31/2003WO2003090422B1 System and method for detecting narrowband interference in a wideband ofdm sign al based on normalized subcarrier amplitudes
12/31/2003WO2002072993B1 Hydraulically balanced reciprocating pulser valve for mud pulse telemetry
12/31/2003CN1465168A Apparatus and method for determining a modulation scheme in a communication system
12/31/2003CN1465167A Method and apparatus for rearranging codeword sequence in a communication system
12/31/2003CN1465156A Data communication device and data communication method
12/31/2003CN1465153A Multi carrier transmission apparatus, multi carrier reception apparatus, and multi carrier radio communication method
12/31/2003CN1465152A Demodulation timing generation circuit and demodulation apparatus
12/31/2003CN1465151A Automatic gain control circuit and method thereof, and demodulation apparatus using the same
12/31/2003CN1465150A Multicarrier transmitter, multicarrier receiver, and multicarrier wireless communication method
12/31/2003CN1464748A Orthogonal frequency division multiplexing transmitter with modified pseudo-random noise sequence and inserted code element
12/31/2003CN1464708A Carrier recovery equipment of digital QAM receiver
12/31/2003CN1464690A Discrete Fourier transform equipment of ADSL system
12/31/2003CN1464655A New modulation method of OFDMA system
12/31/2003CN1464652A Digital broadcast transmitter with broadcasting signal having two guide frequency insterted in transmission and method thereof
12/31/2003CN1133307C Modulation apparatus and method using zero-crossing detection
12/31/2003CN1133306C High frequency radio signal receiving device for digit communication
12/31/2003CN1133285C 多数字化频率上将接收信号数字化的无线电接收机及方法 Multi-frequency digital signal digitization will receive a radio receiver and method
12/31/2003CN1133280C Method for receiving multiple carrier digital signal
12/31/2003CN1133279C Autogain control circuit and receiver having said circuit
12/31/2003CN1133271C Phase locked loop with controllable response time
12/31/2003CA2490520A1 Diversity transmission modes for mimo ofdm communication systems
12/31/2003CA2464612A1 Wireless communication system
12/30/2003US6671504 Radio squelch techniques
12/30/2003US6671342 Phase detectors in carrier recovery for offset QAM and VSB
12/30/2003US6671340 Method and apparatus for reduction of interference in FM in-band on-channel digital audio broadcasting receivers
12/30/2003US6671339 Lock detecting apparatus and method for multimedia digital broadcasting receiver
12/30/2003US6671337 Carrier modulator for use in a transmitter or transceiver
12/30/2003US6671336 Gain controller for circuit having in-phase and quadrature channels, and method
12/30/2003US6671335 Decoder having a gain controller in a mobile communication system
12/30/2003US6671334 Measurement receiver demodulator
12/30/2003US6671333 Method and apparatus for recovering a payload signal from a signal that has been modulated by frequency shift keying
12/30/2003US6671332 Zero IF receiver with reduced AM detector
12/30/2003US6671328 Generating signals having different modulation formats
12/30/2003US6671327 Turbo trellis-coded modulation
12/30/2003US6671251 Method for generating complex quasi-orthogonal code and apparatus and method for spreading channel data using the quasi-orthogonal code in CDMA communication system
12/30/2003US6671002 VSB receiver
12/30/2003US6670900 Quadrature mismatch compensation
12/28/2003CA2390070A1 Method and apparatus for producing and processing sequences of modulation symbols
12/25/2003US20030236076 MIMO telecommunication system with accelerated sphere decoding
12/25/2003US20030236071 System, apparatus, and method for radio communication using a plurality of carriers
12/25/2003US20030235259 System and method for symbol clock recovery
12/25/2003US20030235258 Method and apparatus providing an amplitude independent automatic frequency control circuit
12/25/2003US20030235254 Method and apparatus for detecting a jammed channel in a block oriented digital communication system
12/25/2003US20030235253 Digital transmitter with equalization
12/25/2003US20030235246 Pulse width communications using precision timing
12/25/2003US20030235245 Method and system for computing pre-equalizer coefficients