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)
11/2003
11/06/2003US20030206073 Method and system for synchronizing a quadrature amplitude modulation demodulator
11/06/2003US20030206053 Carrier recovery for DTV receivers
11/06/2003US20030206052 Carrier recovery apparatus for digital QAM receivers
11/06/2003CA2483985A1 Method and device for pulse shaping qpsk signals
11/06/2003CA2452277A1 Apparatus and method for transmitting and receiving side information of a partial transmit sequence in an ofdm communication system
11/05/2003EP1359761A2 Signal transmission system
11/05/2003EP1359719A2 Predistortion for use with non-linear amplifiers
11/05/2003EP1359718A1 Method to limit the amplitude of a carrier frequency output signal
11/05/2003EP1358737A2 Loop extender with selectable line termination and equalization
11/05/2003EP1358728A1 Method for extracting a variable reference pattern
11/05/2003EP1358726A1 A system and method for data transmission in dmt-based dsl modems
11/05/2003EP1171981B1 Digital gmsk filter
11/05/2003EP1118193B1 Encoding/decoding additional symbols in a communications system
11/05/2003EP0931388B1 Spatio-temporal processing for communication
11/05/2003EP0783797B1 A wireless digital communication device, and a pulse shaping network
11/05/2003EP0755601B1 Improved adsl compatible discrete multi-tone apparatus
11/05/2003CN1454423A Modulation method for a multi-carrier process with pre-emphasis
11/05/2003CN1454422A Blind carrier offset detection for quadrature modulated digital communication systems
11/05/2003CN1454421A Data transmission using pulse width modulation
11/05/2003CN1454417A Method for transmitting data by means of chaotic signals
11/05/2003CN1454019A Method and apparatus for channel estimation in digital radio communication system
11/05/2003CN1454015A Power controllable radio mobile communication system and method
11/05/2003CN1453969A Demodulation method with outer management channel for digital communication
11/05/2003CN1127248C Level control and adaptive filtering in CAP receivers
11/05/2003CN1127247C Termination of coded or uncoded modulation with path oriented decoder
11/04/2003US6643518 Method and apparatus for synchronizing telecommunications devices via a transmission network
11/04/2003US6643343 Timing recovery for DMT-based DSL modems
11/04/2003US6643340 Carrier phase derived symbol timing
11/04/2003US6643339 Receiver and receiving method
11/04/2003US6643335 Signal point arrangement dispersion calculation circuit
11/04/2003US6643333 Method and transmitting device for transmitting data symbols from subscriber signals via a radio interface of a mobile communications system
11/04/2003US6643332 Method and apparatus for multi-level coding of digital signals
11/04/2003US6643331 Coding method and apparatus
11/04/2003US6643321 Method for rapid synchronization of a point to multipoint communication system
11/04/2003US6642797 Normalization methods for automatic requency compensation in bluetooth applications
10/2003
10/30/2003WO2003090441A2 Channel aquisition processing for a television receiver
10/30/2003WO2003090440A2 Packet error signal generator
10/30/2003WO2003090422A1 System and method for detecting narrowband interference in a wideband ofdm sign al based on normalized subcarrier amplitudes
10/30/2003WO2003090400A1 System for and method of determining timing information from a multi-carrier signal
10/30/2003WO2003090399A1 Symbol timing search algorithm
10/30/2003WO2003090368A1 Image signal cancel type heterodyne reception method and direct conversion orthogonal frequency division multiplex reception method
10/30/2003WO2003090349A1 Equalizer status monitor
10/30/2003WO2003090348A1 Decision feedback equalizer
10/30/2003WO2003063380A3 Method of and system for power line carrier communications
10/30/2003WO2003050376A3 Burst qam downhole telemetry system
10/30/2003WO2003041327A3 Apparatus and method for reducing papr in an ofdm mobile communication system
10/30/2003WO2003036896A3 Multi-mode communications transmitter
10/30/2003WO2003021845A3 Communicating data using wideband communications
10/30/2003WO2002098004A3 Quadrature alignment in communications receivers
10/30/2003WO2002087104A3 Method for multiple access and transmission in a point-to-multipoint system over an electrical network
10/30/2003WO2002072993A3 Hydraulically balanced reciprocating pulser valve for mud pulse telemetry
10/30/2003US20030204542 Interpolator
10/30/2003US20030203729 Fine-stage automatic frequency compensation in post-detection BLUETOOTH applications
10/30/2003US20030203721 Adaptive air interface waveform
10/30/2003US20030202620 Processing of modulated signals
10/30/2003US20030202616 Radio receiver utilizing a single analog to digital converter
10/30/2003US20030202614 Systems and methods for providing baseband-derived predistortion to increase efficiency of transmitters
10/30/2003US20030202613 Burst-mode combining of reverse path radio frequency signals
10/30/2003US20030202612 Method and system for rate enhanced SHDSL
10/30/2003US20030202611 Method and apparatus for reducing peak to average power ratio of a multi-carrier signal
10/30/2003US20030202570 XDSL multi-hybrid modem with power spectral density shaping
10/30/2003US20030202537 Method and apparatus for data transfer using a time division multiple frequency scheme supplemented with polarity modulation
10/30/2003US20030202492 Adaptive allocation of communications link channels to I- or Q-subchannel
10/30/2003US20030202460 Apparatus and method for transmitting and receiving side information of a partial transmit sequence in an OFDM communication system
10/30/2003US20030201839 Normalization methods for automatic requency compensation in bluetooth applications
10/29/2003EP1357718A2 Multicarrier transmission with measures to reduce the ratio of peak to average power
10/29/2003EP1357714A1 Method and device for channel estimation in digital radio communication systems
10/29/2003EP1357681A1 Power controllable wireless mobile communications system of adaptive modulation and coding scheme and method therefor
10/29/2003EP1356652A1 Bit interleaved coded modulation (BICM) mapping
10/29/2003EP1356651A2 Compensation method for a transceiver using two-point modulation
10/29/2003EP1356650A1 System and method for providing frequency domain synchronization for single carrier signals
10/29/2003EP1356544A1 Carrier interferometry coding and multicarrier processing
10/29/2003EP1356416A1 Improved identification reader
10/29/2003EP1355989A1 Foaming compositions and emulsions containing a polymer comprising water-soluble units and lcst units, particularly for cosmetic applications
10/29/2003EP1269704B1 Peak power control in multicarrier signals
10/29/2003EP1151590B1 Method for detecting pilot signals
10/29/2003CN1452845A Voiceband modem for data communications over digital wireless networks
10/29/2003CN1452835A Termination device for telephone line
10/29/2003CN1452366A Orthogonal multiplexing orthogonal amplitude modulating and changing method and device
10/29/2003CN1452332A Orthogonal frequency division multiplexing all-digit synchronous tracking method and system without pilot frequency asistance
10/29/2003CN1126387C Calling mumber transmission system
10/29/2003CN1126340C System and method for generating RF signals in communication transmitter and base band signal generator
10/29/2003CN1126339C Systen and method for lookup table by reduced NCD
10/29/2003CN1126338C Data carrier with at least two demodulators for receiving ASK signals of differing modulation index
10/29/2003CN1126319C Frame synchornization method and apparatus for use in digital communication system utilizing DFDM method
10/29/2003CN1126313C Diversity receiver for merging vector weighted by coefficient being inversly proportional to deviation angle
10/29/2003CN1126301C Method and apparatus for generating plural quadrature modulated carriers
10/29/2003CN1126293C Asynchronous time division multiplexed packet data transmission system
10/28/2003US6640093 Broadcast receiver
10/28/2003US6640090 Signal transmitter utilizing ask modulation wave
10/28/2003US6639953 Apparatus and method for efficient binary phase shift key data demodulation
10/28/2003US6639952 Demodulator synchronization loop lock-in detection circuit
10/28/2003US6639951 Digital demodulator
10/28/2003US6639949 Method and apparatus for pulse overlap pre-compensation in digitally modulated signals
10/28/2003US6639909 Receiver having functions for cancelling DC offset and measuring carrier detection threshold value, and control method thereof
10/28/2003US6639906 Multichannel demodulator
10/28/2003US6639491 Tunable ferro-electric multiplexer
10/28/2003US6639458 FM demodulator capable of providing demodulated data with high determination accuracy
10/28/2003CA2296137C A coding/modulation scheme selection technique
10/28/2003CA2242123C Communication method, data transmission method and data communication system
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