Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 3 - Line transmission systems
Patents for H04B 3 - Line transmission systems (31,523)
10/1996
10/01/1996CA2109701C Low cross talk electrical connector system
10/01/1996CA2051147C Echo canceller using impulse response estimating method
09/1996
09/25/1996EP0734133A1 Equalisation system for multicarrier receiver
09/25/1996EP0733289A1 Optimization of transmitted pulse shape and receiver timing in digital system
09/25/1996EP0460223B1 Board for surge absorbing device of communication line
09/24/1996US5559881 Network echo canceller
09/24/1996US5559792 Sound modification for use in simultaneous voice and data communications
09/24/1996US5559723 Learning sequence for estimating a transmission channel and corresponding estimator device
09/24/1996US5559462 Digital signal transmission circuit
09/24/1996US5559377 Transformer coupler for communication over various lines
09/19/1996WO1996028897A1 Band power echo reducer for multifrequency signal detectors
09/19/1996WO1996028779A1 Method and apparatus for data encoding and communication over noisy media
09/18/1996EP0732838A2 Acoustic echo cancellor
09/18/1996EP0732831A2 Decision-feedback equalizer with alarm ciruit
09/18/1996EP0731995A1 Reducing crosstalk connector
09/18/1996EP0667066B1 Echo compensation device
09/18/1996EP0653111B1 Reverse-polarity protection by means of a protecting element having a reduced surface
09/18/1996CN1131481A Line interface apparatus and method for isolating data terminal equipment from the line
09/12/1996WO1996027951A1 Method and apparatus for reducing residual far-end echo in voice communication networks
09/12/1996DE19508415A1 Process interface e.g. for automation systems
09/11/1996EP0731593A2 Echo removing apparatus
09/11/1996EP0731585A1 Method and apparatus for performing signal reconstruction at the receiving end of a communication system
09/11/1996EP0731576A2 Gain equalization using monolithic planar waveguide grating multiplexer and demultiplexer
09/11/1996EP0731573A1 Method and apparatus for testing a transmission channel in a communications system
09/11/1996EP0731570A2 Bidirectional communication system for power networks
09/11/1996EP0731567A2 Maximum likelihood sequence estimator and maximum likelihood sequence estimating method
09/11/1996EP0730798A1 Method and apparatus for testing telecommunications equipment
09/11/1996CN1130837A Blind multipath correction for digital communication channel
09/11/1996CN1130830A Hybrid equalizer arrangement for use in data communication equipment
09/10/1996US5555507 Method for detecting non-linear behavior in a digital data transmission path to be examined
09/10/1996US5555442 Error detecting device for a radio blind zone system
09/10/1996US5555293 Optically-coupled data access arrangement and transhybrid
09/10/1996US5555285 Multi-variate system having an intelligent telecommunications interface with automatic adaptive delay distortion equalization (and related method)
09/10/1996US5555274 Phantom data link for digital transmission lines
09/10/1996US5554968 Data communication using power lines
09/10/1996CA2171406A1 Maximum likelihood sequence estimator and maximum likelihood sequence estimating method
09/06/1996WO1996021304A3 Combating signal interference in digital transmission
09/06/1996WO1996019048A3 Method and apparatus for increasing receiver immunity to interference
09/04/1996EP0729670A1 A bidirectional amplifier
09/04/1996EP0673567B1 Process for transmitting data via a heavy current line
09/04/1996EP0646249B1 Process for detecting abnormalities in a line to be examined
09/04/1996EP0569364B1 Bus coupler
09/04/1996CN2234667Y Communication relay device without MF cable tunnel
09/04/1996CN1130330A Composite wave filter
09/03/1996US5553081 Method for detecting a valid message signal
09/03/1996US5553014 Adaptive finite impulse response filtering method and apparatus
08/1996
08/29/1996WO1996026624A1 Apparatus and method for adaptively precompensating for loudspeaker distortions
08/29/1996WO1996026592A1 Apparatus and method for canceling acoustic echoes including non-linear distortions in loudspeaker telephones
08/29/1996WO1996026584A1 Tx preemphasis filter and tx power control based high speed two-wire modem
08/29/1996WO1996026577A1 Process and circuit arrangement for connecting a load to a conductor
08/29/1996WO1996026573A1 Distortion correction device for a path of propagation in transmission systems
08/29/1996WO1996018261A3 High speed communications system for analog subscriber connections
08/29/1996DE19505956A1 Verfahren und Schaltungsanordnung zum Anschließen einer Last an eine Leitung Method and circuit for connecting a load to a line
08/29/1996CA2211954A1 Apparatus and method for adaptively precompensating for loudspeaker distortions
08/28/1996EP0729254A2 Fractionally spaced equalizing circuits and method
08/28/1996EP0729229A2 Adaptive balance filter
08/28/1996EP0728382A1 Pipelined viterbi recorder
08/28/1996CN2234156Y Illumination-line wave-carried submachine for ward mornitoring
08/28/1996CN2234155Y Duplex frequency singing-free amplifier
08/28/1996CN1130008A Power coupler for coupling power from a transmission line to a node thereon
08/28/1996CN1129993A A horizontally twisted-pair planar conductor line structure
08/28/1996CN1129888A Fixed cellular terminal for two-wire telecommunications services
08/28/1996CN1129880A Process for fast blind equalization of an adaptive equalizer
08/27/1996US5550862 Method and apparatus for centering equalizer taps
08/25/1996CA2170195A1 Fractionally spaced equalizing circuits and method
08/25/1996CA2143352A1 Universal video sentry
08/24/1996CA2170221A1 Adaptive balance filter
08/22/1996WO1996025805A1 Echo canceller having kalman filter for optimal adaptation
08/22/1996WO1996018239A3 Terminating transmission line impedance-matching circuit
08/22/1996DE19505611A1 Vorrichtung zur Entzerrung einer Fehlerstrecke in einem Übertragungssystem Device for equalizing a distance error in a transmission system
08/22/1996CA2211865A1 Echo canceller having kalman filter for optimal adaptation
08/21/1996EP0727882A2 Echo cancellation and suppression
08/21/1996EP0727131A1 A system for automated selection of a communications unit for refrigerating containers
08/21/1996EP0727109A1 A variable block size adaptation algorithm for noise-robust acoustic echo cancellation
08/21/1996EP0563373B1 Directive separator/coupler circuit for medium frequency carrier currents on a low voltage electric line
08/21/1996EP0446276B1 Adaptive rate control for echo cancelling modem
08/21/1996EP0407530B1 Multiplexed synchronous/asynchronous data bus
08/20/1996US5548642 Optimization of adaptive filter tap settings for subband acoustic echo cancelers in teleconferencing
08/20/1996US5548614 Method and apparatus for interfacing between a twisted pair and an intelligent cell
08/20/1996US5548570 Optical reproducing circuit having, a binarized signal pulse compensation circuit
08/20/1996US5548226 Fast transmission line implemented with receiver, driver, terminator and IC arrangements
08/20/1996US5548222 Method and apparatus for measuring attenuation and crosstalk in data and communication channels
08/20/1996US5547405 Crosstalk suppressing connector
08/15/1996WO1996024926A2 Method and apparatus in coding digital information
08/14/1996EP0725995A1 Remote power supply unit
08/14/1996CN1128927A Testing circuit for loading terminals
08/13/1996US5546460 Echo compensation device and 4/2-wire interface having such an echo compensation device
08/13/1996US5546459 Variable block size adaptation algorithm for noise-robust acoustic echo cancellation
08/13/1996US5546419 Bus coupler
08/13/1996US5546083 Bidirectional repeater amplifier
08/08/1996WO1996024207A1 Method and system for clearing a frequency band
08/07/1996EP0725527A1 Echo cancelling system suitable for voice conference
08/07/1996EP0725508A1 A communication arrangement with improved echo and noise suppression in a channel containing quantization
08/07/1996EP0725497A2 Data receiving apparatus
08/07/1996EP0725488A2 Data receiving system for receiving data signal faded and delayed
08/07/1996EP0725480A1 Adaptively controlled filter
08/07/1996EP0724799A1 Mains signalling systems
08/07/1996CN1128592A Echo canceler and its learning method
08/07/1996CN1128591A Echo canceler and echo path estimating method
08/06/1996CA2091535C Patch plug for cross-connect equipment
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