Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 3 - Line transmission systems
Patents for H04B 3 - Line transmission systems (31,523)
09/2003
09/18/2003WO2003026236A3 Adaptive equalizer which is independent of the amplitude of the transmited signal
09/18/2003US20030177423 Tranmission device, reception device, test circuit, and test method
09/18/2003US20030174847 Multi-state echo suppressor
09/18/2003US20030174761 Multi-function equializer arrangement
09/18/2003US20030174660 Circuit arrangement for the analogue suppression of echos
09/18/2003US20030173399 Method and device for measuring a line attenuation
09/17/2003EP1345336A1 Automatic gain control method for echo attenuation
09/17/2003EP1344366A2 Method and device for transmitting data on at least one electrical power supply line
09/17/2003EP1344329A1 Power line communications system
09/17/2003EP1344328A1 Method and apparatus for echo cancellation
09/17/2003CN1443415A Viterbi equalization using precalculated metrics increments
09/17/2003CN1443408A Method and device for controlling timing of digital receiver
09/17/2003CN1121747C Arrangement for central remote control system
09/16/2003US6622030 Echo suppression using adaptive gain based on residual echo energy
09/16/2003US6621862 Equalization for multichannel receiving node
09/16/2003US6621562 Time domain reflectometer with wideband dual balanced duplexer line coupling circuit
09/16/2003US6621346 Impedance matching for programmable gain amplifiers
09/12/2003WO2003075483A1 Submarine repeating equipment
09/12/2003WO2003075482A1 Automatic equalizer and coefficient training method thereof
09/12/2003WO2003075478A1 Transmitter/receiver for bidirectional communications
09/12/2003WO2003058828A3 Signal quality indicator on a powerline modem
09/12/2003WO2003003788A3 Supplemental audio content system with wireless communication for a cinema and related methods
09/11/2003US20030169875 On-chip compensation scheme for bridged tap lines in ADSL hybrid
09/11/2003US20030169805 Wired spread spectrum communication device, a method for communication thereof, and a wired spread spectrum communication system
09/11/2003US20030169157 Power line communication modem not requiring extra plug socket
09/11/2003US20030169155 Power line communication system and method of using the same
09/11/2003DE10147772C1 Verfahren zum Betreiben eines Übertragungssystems und Übertragungssystem in einem Energieversorgungsnetz A method of operating a transmission system and transmission system in a power supply network
09/10/2003EP1343253A1 Power line communication modem
09/10/2003EP1342398A2 Energy pathway arrangements for energy conditioning
09/10/2003CN2572675Y Electric signal repeater with anti-echo reflection function
09/10/2003CN1442009A Viterbi equalizer using various hardware data path for ACS transmission metric operations
09/09/2003US6618481 Method for improving acoustic sidetone suppression in hands-free telephones
09/09/2003US6618480 DAC architecture for analog echo cancellation
09/09/2003US6618479 Echo canceler
09/09/2003US6617965 Control of the level of the signal produced by a transceiver coupled to a power distribution line
09/09/2003US6617939 Cable connector assembly with an equalization circuit board
09/09/2003US6616254 Code shift keying transmitter for use in a spread spectrum communications system
09/04/2003WO2003073807A1 Wired transmission path
09/04/2003WO2003073624A2 Dual modulation tuning in systems that exhibit self-disturbance effects
09/04/2003WO2001067628A3 Methods for transmitting a waveform having a controllable attenuation and propagation velocity
09/03/2003EP1062734A4 Power line carrier data link with embedded modem in base unit
09/03/2003EP0744100B1 A system and method for high speed communication of video, voice and error-free data over in-wall wiring
09/03/2003CN2571072Y Carrier wave electric power signal monitor
09/03/2003CN1440618A Repetitive-PN1023-sequence echo-cancellation reference signal for single-carrier digital television broadcast systems
09/03/2003CN1440171A Two-line interface method for digital terminal and power line simulated carrier
09/03/2003CN1440137A Suppression pulse interference device via power line communication systems
09/03/2003CN1440136A Research design-type communication principle test systems
09/03/2003CN1120582C Integral power distribution power line carrier equipment
09/03/2003CN1120566C Frequency hopping and pilot frequency technology using for control system for distortion generated from reducing circuit
09/02/2003US6614907 Echo canceller employing dual-H architecture having variable adaptive gain settings
09/02/2003US6614857 Iterative channel estimation and compensation based thereon
09/02/2003US6614840 Equalizer with phase-locked loop
09/02/2003US6614632 Powerfeed for a submarine communications system
09/02/2003US6614588 Optical amplifier having various control circuitry
09/02/2003US6614326 Power-line coupler having a circuit breaker form or a panelboard employing the same
08/2003
08/28/2003WO2003071804A1 Automatic equalization of video signals
08/28/2003WO2003071709A1 Suppression filter
08/28/2003WO2003071708A1 A communications system utilising electricity cabling
08/28/2003US20030160684 Inductive coupling of a data signal for a power transmission cable
08/27/2003EP1339205A2 Interaction between an echo canceller and a packet voice processing
08/27/2003EP1339193A1 Data rate controller
08/27/2003EP1337925A2 Data bus
08/27/2003EP1337862A2 Asymmetrical communication in prepayment metering
08/27/2003CN1439211A Integrated circuit card for computer communication
08/27/2003CN1119873C Adaptive amplitude-limiting equalizer for mask CD read-out high-frequency signal
08/27/2003CN1119863C System cnnector
08/27/2003CN1119859C Mixing amplifier
08/26/2003US6611601 Echo sound signal suppressing apparatus
08/26/2003US6611595 Method for generating measuring signals for measuring transmission properties of transmission links mutually influencing one another with crosstalk in telecommunications systems, particularly of handsfree equipment
08/26/2003US6611594 Robust signed regressor PNLMS method and apparatus for network echo cancellation
08/26/2003US6611553 Isolation system with digital communication across a capacitive barrier
08/26/2003US6611148 Apparatus for the high voltage testing of insulated conductors and oscillator circuit for use with same
08/26/2003US6611134 Open type electricity meter
08/21/2003WO2003069864A1 Method and system for minimum mean square error equalization (mmse) iteratively circulating short training sequences until mse falls below a target threshold
08/21/2003WO2003069863A1 Method and system for joint decision feedback equalization and complementary code key decoding using a trellis
08/21/2003WO2003069796A1 Power line carrier communication modem
08/21/2003WO2002088884A3 In-line power tap device for ethernet data signal
08/21/2003WO2002039599A9 Data communication over power lines
08/21/2003US20030157885 CATV amplifier bypass repeater for digital data and systems including same
08/21/2003US20030156632 PCM codec and modem for 56k bi-directional transmission
08/21/2003US20030156602 Asynchronous digital signal combiner and method of combining asynchronous digital signals in cable television return path
08/21/2003US20030156370 Power distribution panel capable of transmitting data and wired telecommunication network system including the same
08/21/2003US20030156014 Power-line carrier communication apparatus
08/21/2003US20030156013 Power line communications method
08/21/2003US20030156012 Apparatus and method for a low-rate data transmission mode over a power line
08/21/2003US20030155120 In-well monitoring and flow control system
08/20/2003EP1337100A2 Voice activity detection based on far-end and near-end statistics
08/20/2003EP1337094A2 Method and apparatus for testing a communications wire
08/20/2003EP1337051A1 Method and System for determining the transmission characteristics of an electrically conductive channel
08/20/2003EP1337049A2 Radio base station
08/20/2003EP1336288A2 Measuring a talking quality of a telephone link in a telecommunications network
08/20/2003CN2567910Y Spread spectrum power-line carrier microcomputer type lighting remote controller
08/20/2003CN1437799A Circuit arrangement for the suppression of analogue echoes
08/20/2003CN1437797A Wireless transceiver with subtractive filter compensating both transmit and receive artifacts
08/20/2003CN1437742A Burst QAM Downhole telemetry system
08/20/2003CN1437327A Communication method between inner core and microengine inside network processor
08/20/2003CN1119009C Safety switch-in telephone extension system
08/20/2003CN1118993C Method and equipment for tracking the characteristics of channel
08/20/2003CN1118957C Method and device for transmitting information through power-supply lead wire
08/20/2003CN1118956C Echo path delay estimation
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