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
04/03/2003US20030063685 Coding method in multicarrier transmission and encoder using the same
04/03/2003US20030063683 Digital transmitter with constrained envelope and spectral regrowth over a plurality of carriers
04/03/2003US20030063682 Constrained-envelope digital communications transmitter and method therefor
04/03/2003US20030063679 Demodulation of multiple-carrier phase-modulated signals
04/03/2003US20030063678 OFDM pilot tone tracking to reduce performance loss due to frequency pulling and pushing
04/03/2003US20030063660 Asymmetric digital subscriber line methods suitable for long subscriber loops
04/03/2003US20030063558 OFDM receiver using polar coordinate system and method thereof
04/03/2003US20030063556 Block segmentation procedure for reduction of peak-to-average power ratio effecs in orthogonal frequency-division multiplexing modulation
04/03/2003US20030062971 Band switchable filter
04/03/2003US20030061931 Discriminator for differently modulated signals, method used therein, demodulator equipped therewith, method used therein, sound reproducing apparatus and method for reproducing original music data code
04/02/2003EP1298949A1 Communication system with detection of extra-system interference
04/02/2003EP1298948A1 Radio base station and communication terminal
04/02/2003EP1298907A1 Modem and method for connecting modems in parallel to a network
04/02/2003EP1298876A1 OFDM transmitting and receiving apparatus
04/02/2003EP1298875A1 OFDM transmission using a block guard interval
04/02/2003EP1298832A1 Keyless access control receiver
04/02/2003EP1298791A1 Direct-conversion receiver using quadrature error correction
04/02/2003EP1297672A1 Decsion-directed carrier frequency detector and method for qam
04/02/2003EP1297671A2 Method and apparatus for channel gain and channel delay estimation in a multi-carrier cdma system
04/02/2003EP1297670A2 Method and apparatus for generating a short-range wireless data communication link
04/02/2003EP1297669A1 Viterbi equalization using precalculated metrics increments
04/02/2003EP1195005B1 Device and method for predistorting a transmission signal to be transmitted via a nonlinear transmission path
04/02/2003EP0920765B1 Improvements in, or relating to synchronisation
04/02/2003EP0894364B1 Radio frequency noise canceller
04/02/2003EP0778995B1 Receiver with quadrature decimation stage, method of processing digital signals
04/02/2003CN1408167A Digital transmission method for bandwidth and bit rate flexibility
04/02/2003CN1408166A Method and apparatus for transforming a channel estimate
04/02/2003CN1408143A Simplified digital FIR filter for direct sequence spread spectrum communication system
04/02/2003CN1407737A Method and apparatus for extracting multiple parts of data flow in different channels
04/02/2003CN1104796C Wireless direct sequence-spread spectrum digital crllular telepone system
04/02/2003CN1104795C Device and method for interference mitigation by joint detection of cochann
04/02/2003CN1104694C Method of generating sine/cosine function and apparatus using same
04/01/2003US6542743 Method and apparatus for reducing pilot search times utilizing mobile station location information
04/01/2003US6542561 Information receiving device and method
04/01/2003US6542560 Method of channel estimation and compensation based thereon
04/01/2003US6542557 Method and apparatus for high speed signaling
04/01/2003US6542555 Digital transmitter with equalization
04/01/2003US6542536 Spread spectrum communications with selectable data transfer rates
04/01/2003US6542465 Method for flow control in asymmetric digital subscriber line devices
04/01/2003US6542028 System and method for efficient demodulation and filtering of a received signal
04/01/2003CA2296076C Method and apparatus for minimizing delay variance via time divided transmissions
03/2003
03/27/2003WO2003026260A1 Process, arrangement, devices for seizure of a shared telephone line
03/27/2003WO2003026243A1 Apparatus and method for calculating soft decision value input to channel decoder in a data communication system
03/27/2003WO2003026242A1 A digital implementation of multi-channel demodulators
03/27/2003WO2003026241A2 Method and device for data transmission in a multi-carrier system
03/27/2003WO2003026240A2 Method for transmitting data by multi-carrier modulation
03/27/2003WO2003026236A2 Adaptive equalizer which is independent of the amplitude of the transmited signal
03/27/2003WO2003026226A1 Allocation of bit streams for communication over multi-carrier frequency-division multiplexing (fdm)
03/27/2003WO2003026193A1 Method and communication system device for the generation or processing of ofdm symbols in a transmission system with spread user data
03/27/2003WO2003026179A1 Mapping of bit streams into mpeg frames
03/27/2003WO2003026178A1 Multi-carrier frequency-division multiplexing (fdm) architecture for high speed digital service
03/27/2003WO2003026177A1 Mpeg program clock reference (pcr) delivery for support of accurate network clocks
03/27/2003WO2003026159A1 Digital communication method and system
03/27/2003WO2003026150A1 Ethernet over multi-carrier frequency-division multiplexing (fdm)
03/27/2003WO2003026144A2 Multi-carrier frequency-division multiplexing (fdm) architecture for high speed digital service in local networks
03/27/2003WO2002039711A3 Evaluation circuit for alternating voltage pulses
03/27/2003WO2002033924A3 Bi-directional vector rotator
03/27/2003WO2002015384A9 Method and apparatus for a frequency agile variable bandwidth transceiver
03/27/2003US20030061614 High-speed point-to-point modem-less microwave radio frequency link using direct on-off key modulation
03/27/2003US20030060174 System and method of phase modulation control in RF signal generation
03/27/2003US20030060165 Multi-carrier communication apparatus
03/27/2003US20030059197 Peripheral for portable viewing apparatus and broadcasting viewing system
03/27/2003US20030059011 Modem and method
03/27/2003US20030058975 Efficient methods for filtering to avoid inter-symbol interference and processing digital signals having large frequency guard bands
03/27/2003US20030058972 Apparatus and Method for Preamble Reception
03/27/2003US20030058968 Detection of a false detection of a communication packet
03/27/2003US20030058967 Phase detectors in carrier recovery for offset QAM and VSB
03/27/2003US20030058966 Fine frequency offset estimation and calculation and use to improve communication system performance
03/27/2003US20030058960 Predistortion type-linearized power amplification system using digital if technology
03/27/2003US20030058959 Combined digital adaptive pre-distorter and pre-equalizer system for modems in link hopping radio networks
03/27/2003US20030058958 Multi-stage code generator and decoder for communication systems
03/27/2003US20030058956 Switching mode power amplifier using PWM and PPM for bandpass signals
03/27/2003US20030058955 High-speed communications transceiver
03/27/2003US20030058953 Receiver of an orthogonal frequency division multiplexing system
03/27/2003US20030058952 Single-carrier to multi-carrier wireless architecture
03/27/2003US20030058951 Efficient pilot tracking method for OFDM receivers
03/27/2003US20030058950 Multiple sub-channel modulation and demodulation with arbitrarily defined channel spacing and sampling rates
03/27/2003US20030058927 Spread spectrum receiver kalman filter residual estimator method
03/27/2003US20030058896 Multiplexer cell and multiplexer circuit arrangement and coding device for use in a multiplexer circuit arrangement of this kind
03/27/2003US20030058890 MPEG program clock reference (PCR) delivery for support of accurate network clocks
03/27/2003US20030058885 Multi-carrier frequency-division multiplexing (FDM) architecture for high speed digital service in local networks
03/27/2003US20030058881 Data streaming method and apparatus using adaptive transmission scheduling
03/27/2003US20030058787 Method and apparatus for channel estimation
03/27/2003US20030058786 Method and apparatus for receiving diversity signals for use in OFDM radio communication system
03/27/2003US20030058141 Robust system for transmitting and receiving map data
03/27/2003US20030058140 Kerdock coding and decoding system for map data
03/27/2003US20030058037 Radio apparatus carrying out automatic gain control and gain control method
03/27/2003US20030058036 Method for demodulating PSK modulated signals
03/27/2003US20030057965 Apparatus and method for measuring a phase delay characteristic
03/27/2003US20030057939 Method for detecting current transformer saturation
03/27/2003DE29924419U1 Binary quasi-orthogonal code generating method in code division multiple access communication system, involves selecting quasi-orthogonal code satisfying a correlation property, from code candidate families
03/27/2003CA2460988A1 Adaptive equalizer which is independent of the amplitude of the transmited signal
03/27/2003CA2460581A1 Allocation of bit streams for communication over multi-carrier frequency-division multiplexing (fdm)
03/26/2003EP1296495A2 Multi-tone transmission with peak amplitude control
03/26/2003EP1296494A2 Channel power allocation in a multi-frequency data transmission
03/26/2003EP1296493A2 Symbol synchronisation in a multicarrier receiver
03/26/2003EP1296492A1 Multicarrier receiver with a sliding window Fourier transform and a Fourier transform
03/26/2003EP1296461A2 CDMA despreading using QPSK rotated PN sequences
03/26/2003EP1295451A1 System and method for high data rate transmission
03/26/2003EP1295450A2 Ultra wide band transmitter
1 ... 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 ... 898