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)
04/2003
04/15/2003US6549584 Coding scheme for cable modems
04/15/2003US6549583 Optimum phase error metric for OFDM pilot tone tracking in wireless LAN
04/15/2003US6549581 Transmitter and method to cancel interference in OFDM communication
04/15/2003US6549566 Bandwidth reduced multi carrier wireless transceiver and method thereof
04/15/2003US6549564 Random access in a mobile telecommunications system
04/15/2003US6549561 OFDM pilot tone tracking for wireless LAN
04/15/2003US6549544 Method and apparatus for transmission and reception of FM in-band on-channel digital audio broadcasting
04/15/2003US6549525 High data rate CDMA wireless communication system
04/15/2003US6549520 Method and apparatus for varying power levels in a multicarrier modem
04/15/2003US6549512 MDSL DMT architecture
04/15/2003US6549242 Combining adjacent TV channels for transmission by a common antenna
04/15/2003US6549067 Method and apparatus for linearizing an output signal
04/15/2003CA2296091C Method and apparatus for adaptive control of forward error correction codes
04/15/2003CA2238332C Determining signal components using digital signal processing
04/10/2003WO2003030577A1 Communication system with detection of extra-system interference
04/10/2003WO2003030439A1 A data retransmission method based on bit transform
04/10/2003WO2003030423A1 Ofdm transmitter and ofdm transmitting method
04/10/2003WO2003030400A1 Automatic frequency correction method and apparatus for time division duplex modes of 3g wireless communications
04/10/2003WO2003030362A2 Multiplexer cell and multiplexer circuit arrangement and encoding device for use in a multiplexer circuit arrangement of this type
04/10/2003WO2003030350A1 Oscillator, transmission circuit, and radio apparatus
04/10/2003WO2003019240A3 Optical communications systems, devices, and methods
04/10/2003WO2002082634A3 Demodulator for amplitude shift key (ask)-modulated signals
04/10/2003WO2002054789A3 Apparatus and method for ofdm data communications
04/10/2003WO2002049263A3 Blind channel estimation and data detection for psk ofdm-based receivers
04/10/2003US20030067999 Method and apparatus for detecting data sequences
04/10/2003US20030067997 Intermediate frequency signal amplitude equalizer for multichannel applications
04/10/2003US20030067995 Transmission apparatus
04/10/2003US20030067992 Optimal trellis code design for QPSK and higher order quadrature amplitude modulations
04/10/2003US20030067991 Multi-mode block-coded modulation/demodulation method
04/10/2003US20030067990 Peak to average power ratio reduction in a digitally-modulated signal
04/10/2003US20030067963 Mode controller for signal acquisition and tracking in an ultra wideband communication system
04/10/2003US20030067895 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
04/10/2003US20030067883 Method and apparatus to improve SCDMA headroom
04/10/2003US20030067866 Method and apparatus for reducing peak power in partial transmit sequence OFDM
04/09/2003EP1301030A2 Method and apparatus for simultaneously retrieving portions of a data stream from different channels
04/09/2003EP1301003A1 Diversity Receiver unit for receiving an ofdm signal
04/09/2003EP1301002A1 Digital radio communication system
04/09/2003EP1301001A2 Transmission with constellations of a size other than a power of two
04/09/2003EP1300977A1 Parallel interference cancellation in an MC-CDMA telecommunication system
04/09/2003EP1300971A1 Multi-carrier communication method and multi-carrier communication apparatus
04/09/2003EP1300962A1 Automatic frequency control device and automatic frequency control method
04/09/2003EP1299979A1 Direct digital synthesis in a qam demodulator
04/09/2003EP1299978A2 Multiplexing of real time services and non-real time services for ofdm systems
04/09/2003EP1299965A1 Data transmission system and method
04/09/2003EP1299963A2 Ofdm antenna diversity receiver
04/09/2003EP1299959A1 A framing method and the synchronous wireless system therewith
04/09/2003EP1299955A2 Rate n/n systematic, recursive convolutional encoder and corresponding decoder
04/09/2003EP1206758B1 Transmitter for electronic article surveillance system
04/09/2003EP0894368B1 Method and apparatus for interference decorrelation in time and space
04/09/2003EP0750810B1 Pipelined cell site base station receiver for multiple spread spectrum signals
04/09/2003CN1409911A Receiving device for angle-modulated signals
04/09/2003CN1409551A Peripheral device of portable audio-visual device and broadcast audio-visual system
04/09/2003CN1409525A Modulation method and device for executing Nyquist folding frequency
04/09/2003CN1409524A Complex circuit safety digital frequency mixing system
04/09/2003CN1409506A Quadrature frequency division multiply equalizer tap initializing method and device using self adaptive calculation
04/09/2003CN1409505A Selective equalizer tap initializing method and device in quadrature frequency division multiply system
04/08/2003US6546261 Method and apparatus for configuring communication apparatus in accordance with communication services and protocols
04/08/2003US6546237 Differential FM detector for radio receivers
04/08/2003US6546060 Direct modulating FSK transmitter for MCA
04/08/2003US6546056 Timing recovery in a multi-tone modem
04/08/2003US6546055 Carrier offset determination for RF signals having a cyclic prefix
04/08/2003US6546047 Methods and circuits for optimal equalization
04/08/2003US6546041 Radio transmission method and apparatus for digital information
04/08/2003US6545983 Method for balancing the ratio Eb/I in a service multiplexing CDMA system and telecommunication systems using same
04/08/2003US6545728 Digital television receivers that digitize final I-F signals resulting from triple-conversion
04/08/2003US6545557 FM signal oscillator circuit and modulation level control method
04/08/2003US6545532 Timing recovery circuit in a QAM demodulator
04/08/2003CA2306993C Ask modulator and communication device using the same
04/08/2003CA2296078C Multicarrier demux/demod (mcdd) wireless network architecture
04/08/2003CA2209290C Frequency synthesizer
04/08/2003CA2078370C Cellular radio communications system
04/03/2003WO2003028379A1 Mapping system for transmission and reception of multiple data types
04/03/2003WO2003028329A2 Single-carrier and multicarrier receiver architecture
04/03/2003WO2003028328A2 Start up of a phase modulator
04/03/2003WO2003028327A2 Efficient methods for filtering to avoid inter-symbol interference and processing digital signals having large frequency guard bands
04/03/2003WO2003028323A1 Adaptive channel estimation for an ofdm-based mobile telephony system by variation of the number of pilot symbols
04/03/2003WO2003028276A2 Qpsk phase ambiguity corrector
04/03/2003WO2003028270A1 Post-fft scaling to reduce multiple effects and fine frequency offset estimation
04/03/2003WO2003028269A2 An adaptive coding scheme for ofdm wlans with a priori channel state information at the transmitter
04/03/2003WO2003028255A2 Method and apparatus for data transfer using a time division multiple frequency scheme
04/03/2003WO2003028252A1 System and method for orthogonal frequency division multiplexed optical communication
04/03/2003WO2003028234A1 System and method for embedding a sub-channel in a block coded data stream
04/03/2003WO2003028223A1 Decoding of a systematic kerdock code for map data
04/03/2003WO2003028215A2 Tunable oscillator
04/03/2003WO2003028205A1 Method and system to implement non-linear filtering and crossover detection for pilot carrier signal phase tracking
04/03/2003WO2003028204A1 Method for demodulating psk modulated signals
04/03/2003WO2003003683A3 Method for avoiding interference radiation of am transmitters used in digital transmission
04/03/2003WO2002051102A3 Method of providing high-speed digital services over a switched telephone network
04/03/2003WO2002031963A3 Modulator using a phase-locked loop
04/03/2003WO2001078392A3 Reduced bandwidth transmitter method and apparatus
04/03/2003US20030066015 System for synchronising a multiple access digital telecommunication system
04/03/2003US20030065799 Communication device
04/03/2003US20030064737 Method and apparatus for distortionless peak reduction
04/03/2003US20030064693 Automatic frequency correction method and apparatus for time division duplex modes of 3g wireless communications
04/03/2003US20030064690 System and related methods for introducing sub-carrier diversity in a wideband communication system
04/03/2003US20030063700 Phase discriminator with a phase compensation circuit
04/03/2003US20030063694 Automatic frequency control of GMSK time-dispersive channels
04/03/2003US20030063691 Radio communication control device which can accurately determine the start point of the standby period timer
04/03/2003US20030063688 Modulator and communication system and modulation program
04/03/2003US20030063686 System and method for predistorting a signal using current and past signal samples
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