Patents for H04L 27 - Modulated-carrier systems (89,721)
10/2002
10/09/2002EP1248395A2 Reference frequency spur cancellation in synthesized measurement receivers
10/09/2002EP1002390A4 Method and system for rapid initial signal detection in a wireless communications system
10/09/2002EP0836770B1 Automatic power control system for a code division multiple access (cdma) communications system
10/09/2002CN1373957A Dual automatic gain control in QAM demodulator
10/09/2002CN1373622A Base band processor integrating more modulation functions and method for implementing different modulations
10/09/2002CN1373563A Mobie station receiver capable of using for single carrier and multiple carrier receiving operation
10/09/2002CN1092441C Method and device of synchronizing digital signal receiver accurately
10/09/2002CN1092440C Transmission device with echo eliminating function
10/09/2002CN1092427C Vorsh QPSK sheet modulating eqipment for producing signal waveform
10/08/2002US6463266 Radio frequency control for communications systems
10/08/2002US6463107 Methods and apparatuses for synchronization and modulation type detection
10/08/2002US6463106 Receiver with adaptive processing
10/08/2002US6463104 Method of increasing coding levels
10/08/2002US6463094 Point-to-point secure modem and method
10/08/2002US6463093 Method and apparatus to reduce spurious and intermodulation products in wireless broadband multi-carrier digital transceiver equipment through static non-linearity correction of digital conversion components
10/08/2002US6463043 Carrier phase recovery of multi-rate signals
10/08/2002US6462626 Quadrature output oscillator device
10/03/2002WO2002078281A1 Dual-mode tranmsitter
10/03/2002WO2002078280A2 Method for frame and frequency synchronization of an ofdm signal and method for transmitting an ofdm signal
10/03/2002WO2002078244A1 Receiver transparent q-mode
10/03/2002WO2002078232A1 Data communication apparatus and method based on orthogonal frequency division multiple access
10/03/2002WO2002078221A1 Propagation path variation estimating device and propagation path variation estimating method
10/03/2002WO2002078211A2 Method and apparatus for utilizing channel state information in a wireless communication system
10/03/2002WO2002078208A2 Corrector for non-monotonic characteristics of a satellite transmission channel
10/03/2002WO2002078206A2 Bi-directional communication system with echo cancellation
10/03/2002WO2002078200A2 Transceiver
10/03/2002WO2002078170A1 System for controlling a class d amplifier
10/03/2002WO2002060107A3 Quadrature modulator and demodulator
10/03/2002WO2002023850A3 Multicarrier receiver
10/03/2002US20020142739 Multi-channel peak power smoothing
10/03/2002US20020142732 Transceiver capable of adaptively selecting a modulation method based on the transmission power and channel condition
10/03/2002US20020141522 Method and apparatus for processing digitally sampled signals at a resolution finer than that of a sampling clock
10/03/2002US20020141510 Method of and apparatus for performing modulation
10/03/2002US20020141509 Intermodulation distortion identification and quantization circuit for a linear amplifier system
10/03/2002US20020141508 Space-time trellis code for orthogonal frequency division multiplexing (OFDM)
10/03/2002US20020141505 Method and apparatus in a communication system
10/03/2002US20020141504 Receiver
10/03/2002US20020141492 Line driver and method of operating the same
10/03/2002US20020141487 Signal detection using a CDMA receiver
10/03/2002US20020141478 Apparatus for initial power control for spread-spectrum communications
10/03/2002US20020141440 System and method for improved data transmission speed by fixing the lower corner frequency at a frequency above voice band in a symmetric DSL transmission system
10/03/2002US20020141355 Wireless access system and associated method using multiple modulation formats in TDD frames according to subscriber service type
10/03/2002US20020140601 Receiver
10/03/2002US20020140514 Modulator-demodulator
10/03/2002CA2439804A1 Receiver transparent q-mode
10/02/2002EP1246423A2 Adaptation of frequency of occurence of transmission of a reference signal based on the channel quality in an OFDM system
10/02/2002EP1246422A1 Equaliser for multicarrier system
10/02/2002EP1246421A1 Receiver of frequency modulated signals with digital demodulator
10/02/2002EP1246419A1 Method and apparatus for calculating bit log-likelihood ratios for qam signals
10/02/2002EP1246386A1 Data communication apparatus and method based on orthogonal frequency division multiple access
10/02/2002EP1245109A1 A method and an arrangement for securing an adsl connection
10/02/2002EP1245104A1 Correction of a sampling frequency offset in an orthogonal frequency division multiplexing system by sidelobe analysis of pilot subcarriers
10/02/2002EP1245103A1 Offset correction in a spread spectrum communication system
10/02/2002EP1245102A1 Method and apparatus for rotating the phase of a complex psk signal
10/02/2002EP1245101A1 Method and apparatus for buffering data samples in a software based adsl modem
10/02/2002EP1245088A1 Data transceiver with filtering and precoding
10/02/2002EP1245084A1 Method and apparatus for rf common-mode noise rejection in a dsl receiver
10/02/2002EP1244979A1 Transform engine for discrete multi-tone transceivers
10/02/2002EP0876179B1 Adaptive, performance-optimizing communication system for communicating with an implanted medical device
10/02/2002CN1372745A Demodulator which uses a delay detector
10/02/2002CN1372744A Synchronization and detection of modulation type
10/02/2002CN1372743A Method and apparatus for performing DC-offset compensation in a radio receiver
10/02/2002CN1372728A Communication terminal apparatus and demodulation method
10/02/2002CN1372725A Reception method and receiver array for a duplex transmission system
10/02/2002CN1372406A Transmitting circuit
10/01/2002US6459888 Method of estimating carrier frequency in a digital mobile communications system through multiple hypotheses performed on the received signal
10/01/2002US6459883 Generic finger architecture for spread spectrum applications
10/01/2002US6459796 AM stereo receiver with reduced distortion
10/01/2002US6459745 Frequency/timing recovery circuit for orthogonal frequency division multiplexed signals
10/01/2002US6459744 Multi-carrier symbol synchronization
10/01/2002US6459743 Digital reception with radio frequency sampling
10/01/2002US6459742 Digital modulation process and modulator implementing the process
10/01/2002US6459741 Implementation of N-VSB training sequences in N-squared QAM receiver structures
10/01/2002US6459739 Method and apparatus for RF common-mode noise rejection in a DSL receiver
10/01/2002US6459727 Very high speed digital subscriber line receiver, and programmable gain amplifier and narrow-band noise remover thereof
10/01/2002US6459679 Method and apparatus for synchronizing orthogonal frequency division multiplexing (OFDM) receiver
10/01/2002US6459678 System and method for providing near optimal bit loading in a discrete multi-tone modulation system
10/01/2002US6457229 Ignition device for internal combustion engine
10/01/2002CA2224706C Automatic power control system for a code division multiple access (cdma) communications system
10/01/2002CA2169078C Information transmission system and method of operation
09/2002
09/26/2002WO2002076056A2 Method for the frequency and time synchronization of an ofdm receiver
09/26/2002WO2002076052A2 Symmetric line coding
09/26/2002WO2002075961A1 Method and device for receiving synchronization signals
09/26/2002WO2002075950A1 Interference rejection in a receiver
09/26/2002WO2002058310A3 Fast initialization using seamless rate adaptation
09/26/2002WO2002043258A3 Dc-offset correction circuit having a dc control loop and a dc blocking circuit
09/26/2002WO2002037768A8 Communication system and communication control apparatus and method
09/26/2002WO2000036742A3 Phase modulating transmitter
09/26/2002US20020138807 Optimum UMTS modem
09/26/2002US20020137533 System for coordination of TDD transmission bursts within and between cells in a wireless access system and method of operation
09/26/2002US20020137488 Direct conversion receiver for performing phase correction upon change of the gain of low-noise amplifier
09/26/2002US20020137482 Signal transmitting apparatus
09/26/2002US20020137469 Radio communication apparatus and radio communication method
09/26/2002US20020137467 Fast initialization using seamless rate adaptation
09/26/2002US20020136394 Signal coupler using high voltage and low voltage filtering
09/26/2002US20020136333 Segmented architecture for multiple sequence detection and identification with frequency offset compensation
09/26/2002US20020136331 Method and apparatus for performing channel estimation with a limiting receiver
09/26/2002US20020136329 Timing recovery using the pilot signal in high definition TV
09/26/2002US20020136327 Method and system for utilizing space-time codes for block fading channels
09/26/2002US20020136326 System for controlling a class D amplifier