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)
06/2003
06/24/2003US6584068 Prototype signals construction for multicarrier transmission
06/24/2003US6583678 Electrical circuit and method for pulse modulation of a carrier signal
06/19/2003WO2003051011A1 Group delay precompensator
06/19/2003WO2003050993A1 Bit level diversity combining for cofd system
06/19/2003WO2003050991A2 System and method for improving data transmission
06/19/2003WO2003050987A1 Method and apparatus of frequency correction in a receiver in cdma communication system
06/19/2003WO2003050968A2 Time-domain transmit and receive processing using singular value decomposition for mimo systems
06/19/2003WO2003050954A1 Method and apparatus to generate on-off keying signals suitable for communications
06/19/2003WO2003050943A1 Am digital audio broadcasting with analog signal pre-compensation
06/19/2003WO2003050653A2 System and method for increasing data capacity in communication systems
06/19/2003WO2003050376A2 Burst qam downhole telemetry system
06/19/2003WO2003034185A3 Method and system for dsl power saving
06/19/2003WO2003024046A3 Spread spectrum receiver with frequency tracking which uses pilots signals
06/19/2003WO2003007470A3 Harmonic mixer
06/19/2003US20030115540 Base-band encoding apparatus and frequency modulation method using the same in digital broadcasting system
06/19/2003US20030115533 Source coding for interference reduction
06/19/2003US20030114172 Method and apparatus for reducing pilot search times utilizing mobile station location information
06/19/2003US20030114124 Transmission output power control device for use in a burst transmitter and control method
06/19/2003US20030114110 Automatic frequency control algorithm
06/19/2003US20030112914 Multi-pass phase tracking loop with rewind of current waveform in digital communication systems
06/19/2003US20030112911 Method and apparatus for synchronising receivers
06/19/2003US20030112902 Bit level diversity combining for COFDM system
06/19/2003US20030112901 Method and apparatus for determining the log-likelihood ratio with precoding
06/19/2003US20030112900 Demodulation apparatus and method in a communication system employing 8-ary PSK modulation
06/19/2003US20030112899 Decision directed phase locked loops (DD-PLL) with excess processing power in digital communication systems
06/19/2003US20030112898 Method for detecting and correcting amplitude and phase imbalances between I and Q components in quadrature demodulator
06/19/2003US20030112896 Multi-channel communications transceiver
06/19/2003US20030112894 Modulator of phase shift keying (PSK) type
06/19/2003US20030112893 Digital frequency modulator
06/19/2003US20030112892 Very high-speed digital RF clipper/modulator
06/19/2003US20030112891 Distortion compensating device
06/19/2003US20030112890 Method and apparatus for pulse overlap pre-compensation in digitally modulated signals
06/19/2003US20030112888 Multilevel modulating method, multilevel demodulating method, and multilevel modulating and demodulating method
06/19/2003US20030112884 Method for seamlessly changing power modes in an ADSL system
06/19/2003US20030112883 Method and apparatus for bi-directional communication in systems broadcasting multi-carrier signals
06/19/2003US20030112882 System and method for multiple signal carrier time domain channel estimation
06/19/2003US20030112880 Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion
06/19/2003US20030112862 Method and apparatus to generate ON-OFF keying signals suitable for communications
06/19/2003US20030112858 Near-end crosstalk noise minimization and power reduction for digital subscriber loops
06/19/2003US20030112825 Method and system to implement non-linear filtering and crossover detection for pilot carrier signal phase tracking
06/19/2003US20030112745 Method and system of operating a coded OFDM communication system
06/19/2003US20030112744 Method and system of operation for a variable transmission mode multi-carrier communication system
06/19/2003US20030112743 Timing synchronization for OFDM-based wireless networks
06/19/2003US20030112370 Adaptive expanded information capacity for communications systems
06/19/2003US20030112061 Method for demodulating signal
06/19/2003CA2469168A1 Burst qam downhole telemetry system
06/19/2003CA2467578A1 Am digital audio broadcasting with analog signal pre-compensation
06/18/2003EP1320232A2 Phase Estimation And Compensation In Orthogonal Frequency Division Multiplex (OFDM) Systems
06/18/2003EP1320211A2 Method and apparatus for protecting a connection-oriented, bidirectional transmission of data blocks by adaptive scrambling
06/18/2003EP1320191A2 Transmission output power control device for use in a burst transmitter and control method
06/18/2003EP1319293A1 Distributed pilot multicarrier signal designed to limit interference affecting said pilots
06/18/2003EP1319292A1 Reference symbol multicarrier signal designed for limiting intersymbol interference
06/18/2003EP1319290A1 Method for frequency acquisition, especially for initial frequency acquisition, of a mobile communications device
06/18/2003EP1319278A1 Cyclic delay diversity for mitigating isi in ofdm systems
06/18/2003EP1131896B1 Method and apparatus for saving current while performing signal strength measurements in a homodyne receiver
06/18/2003EP0732013B1 Multipath search processor for a spread spectrum multiple access communication system
06/18/2003CN1425243A Coding method and use of receiver with convolutional decoder
06/18/2003CN1425242A System and method for peak power reduction in spread spectrum communications systems
06/18/2003CN1425241A Enhanced cut prediction of feedback
06/18/2003CN1425240A Method and apparatus for implementing training phase of adaptive channel equalization on digital communications path
06/18/2003CN1425229A Programmable synchronization unit for signal receiver
06/18/2003CN1424853A Error calibrator for digital broadcast receiver with phase faults compenstation
06/18/2003CN1424840A Device and method for providing calling in loop trunk
06/18/2003CN1112071C Communication method between mobile terminal and attached apparatus
06/18/2003CN1112013C Pilot signal search method
06/18/2003CN1112012C Signal Carrier recovery method
06/18/2003CN1112011C Equalising and decoding device for frequency-selective digital transmission channel
06/18/2003CN1112010C Adaptive multimode equaliser
06/18/2003CN1111990C Transmitter method and transmission system using adaptive coding based on channel characteristics
06/18/2003CN1111975C Device and method for radio transmitters
06/18/2003CN1111967C Digital radio communication receiver
06/18/2003CN1111944C Method and appts. for converting wide band i-f signal to complex (quadrature) baseband signal
06/18/2003CN1111943C Method and device for use with phase modulated signals
06/18/2003CN1111942C Apparatus and method for carrier frequency compensation in FM radio receiver
06/17/2003US6580793 Method and apparatus for echo cancellation with self-deactivation
06/17/2003US6580762 Rate matching method
06/17/2003US6580761 Coding technique in discrete multi-tone (DMT) based communications systems
06/17/2003US6580752 Alternative configurations for an ADSL system operating in a time duplex noise environment
06/17/2003US6580751 High speed downhole communications network having point to multi-point orthogonal frequency division multiplexing
06/17/2003US6580705 Signal combining scheme for wireless transmission systems having multiple modulation schemes
06/17/2003US6580314 Demodulation system and method for recovering a signal of interest from a modulated carrier sampled at two times the phase generated carrier frequency
06/17/2003US6580286 Method and apparatus for active line termination
06/17/2003CA2154646C Small-scale signal adding device and differential detecting device
06/12/2003WO2003049474A1 Mobile body communication apparatus
06/12/2003WO2003049397A2 Iterative detection and decoding for a mimo-ofdm system
06/12/2003WO2003049396A2 Cancellation of interference in multicarrier receivers
06/12/2003WO2003049395A1 Multirate digital transceiver
06/12/2003WO2003049394A1 Method and apparatus for multi-level phase shift keying communications
06/12/2003WO2003049393A1 Differential encoder for an optical dqpsk modulator
06/12/2003WO2003049392A1 Data communication control system, transmitter, and transmitting method
06/12/2003WO2003049391A1 Frequency offset correction based on the presence or absence of a received signal
06/12/2003WO2003049390A1 Soft decision gain compensation for receive filter attenuation
06/12/2003WO2003049359A1 Information content distribution based on privacy and/or personal information
06/12/2003WO2003049355A1 Communication using simultaneous orthogonal signals
06/12/2003WO2003049331A1 Optical external dpqsk modulator with subsequent prechirping
06/12/2003WO2003049323A1 Method of selecting a receiving path and receiving device comprising several receiving paths
06/12/2003WO2003049275A1 In-phase and quadrature demodulator for rfid system without directional coupler
06/12/2003US20030110436 ARQ retransmission with reordering scheme employing multiple redudancy versions and receiver/transmitter therefor
06/12/2003US20030109282 Method and base station for providing phase-shift transmit diversity
06/12/2003US20030109242 Receiver capable of receiving radio signals in a preferred state at all times
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