H04B 3 - Line transmission systems

Patents for H04B 3 - Line transmission systems (31,523)
12/1988
12/20/1988	US4792940 Automatic retrain method for a full duplex modem having an echo canceller and an equalizer
12/20/1988	US4792915 Non linear adaptive filters
12/20/1988	CA1247205A1 Noise-free terminal station compatible with existing master stations
12/14/1988	EP0294897A1 Data transmission system comprising a decision feedback equalizer and using partial-response techniques
12/14/1988	EP0294896A1 Data signal transmission system using decision feedback equalisation
12/14/1988	EP0294895A1 Arrangement for cancelling intersymbol interference and noise
12/13/1988	US4791668 Selectable impedance line interface circuit
12/13/1988	US4791390 MSE variable step adaptive filter
12/13/1988	CA1246709A1 Receiver apparatus for three-phase power line carrier communications
12/07/1988	EP0294139A2 Safety barriers for 2-wire transmitters
12/07/1988	EP0294116A2 Digital adaptive receiver employing maximum-likelihood sequence estimation with neural networks
12/06/1988	US4789999 Line circuit for coupling a subscriber set to a switching facility to provide a complex impedance match
12/06/1988	US4789952 Method and apparatus for digital compensation and digital equalization
12/06/1988	US4789049 Signal transmitting equipment for elevator
12/06/1988	CA1246260A1 Modem communication system having training means and method for training same
12/06/1988	CA1246163A1 Adaptive equalizer
12/01/1988	WO1988009589A1 Wireless remote speaker system
12/01/1988	DE3716164A1 Device for minimising reflection interference on bus lines
11/1988
11/30/1988	CN88102826A 音量范围控制电路 Volume range control circuit
11/29/1988	US4788652 I-Q channel adaptive line enhancer
11/29/1988	CA1245739A1 Method and apparatus for testing communication systems
11/29/1988	CA1245738A1 Method and apparatus for supervising the accessing and testing of communication systems
11/22/1988	US4787094 Apparatus for transmitting digital signal
11/22/1988	US4787080 PCM coder and decoder circuit having digital balancing network
11/22/1988	US4786884 Adaptive transversal filter
11/22/1988	CA1245293A1 Transceiver for multi-drop local area networks
11/17/1988	EP0290952A2 Speech control circuitry for a telecommunication terminal
11/17/1988	EP0112395B1 Training system for data receiver
11/16/1988	CN87211346U Portable ac count pulsimeter
11/15/1988	US4785445 An echo canceler associated with a data transmission modem
11/15/1988	US4785265 For equalizing signals from plural cables of different lengths
11/15/1988	US4785195 Power line communication
11/10/1988	DE3714595A1 Communications system (with mixed frequency and IF stage) without its own lines
11/09/1988	EP0289818A2 A non-inverting repeater circuit for use in semiconductor circuit interconnections
11/08/1988	US4783791 Multiple reproducing repeater station system
11/03/1988	DE3812640A1 Transversal filter for echo cancellers
11/02/1988	EP0288577A1 Echo canceller with short processing delay and decreased multiplication number and method for controlling an echo signal.
11/01/1988	US4782525 Echo cancellation in two-wire transmission path repeaters
11/01/1988	US4782459 Adaptive recognizing device
11/01/1988	US4782322 Amplitude modulation of control signals over electrical power lines utilizing the response of tuning fork filters
11/01/1988	CA1244138A1 Data transmitting-receiving system
10/1988
10/26/1988	EP0287743A1 Echo cancelling device with phase-roll correction
10/26/1988	EP0287742A1 Echo cancelling device for data transmission over two-wire line
10/26/1988	CN88101945A Two-wire loop electric circuit arrangement
10/25/1988	CA1243750A1 On-line serial communication interface from a transmitter to a current loop
10/20/1988	WO1988008185A1 Two-wire loop electric circuit arrangement
10/20/1988	DE3711751A1 DC data transmission device
10/19/1988	EP0287369A2 Remote disconnection and shortcircuiting apparatus
10/13/1988	DE3710655A1 Feed device for DC series connection of electric loads (consumers)
10/11/1988	US4777652 Radio communication systems for underground mines
10/11/1988	CA1243095A1 On-line serial communication interface from a current loop to a computer and/or terminal
10/06/1988	WO1988007792A1 Modem with improved remote echo location and cancellation
10/06/1988	WO1988007790A1 Digital adaptive filter
10/06/1988	WO1988007789A1 Analog/digital adaptive line enhancer
10/06/1988	WO1988007788A1 I-q channel adaptive line enhancer
10/05/1988	EP0285413A2 Sample rate converter
10/04/1988	US4775988 Method for rapid gain acquisition in a modem receiver
09/1988
09/27/1988	CA1242541A1 Echo cancellation in two-wire transmission path repeaters
09/27/1988	CA1242502A1 Arrangement for receiving digital data comprising an arrangement for adaptive rate recovery
09/22/1988	WO1988007184A1 Device employing a tensile force meter for measuring tensile force
09/21/1988	EP0282577A1 Energy management system.
09/21/1988	EP0282572A1 Responder unit for energy management system
09/20/1988	US4773082 RF modem with improved binary transversal filter
09/20/1988	US4773034 Adaptive equalizer utilizing a plurality of multiplier-accumulator devices
09/20/1988	US4772870 Power line communication system
09/14/1988	EP0282393A1 Device for the realization of the hands free function in a telephone set associated with the functions of gain switching and echo cancelling
09/13/1988	US4771449 Data station termination circuit
09/13/1988	US4771396 Digital filters
09/13/1988	US4771229 Circuit arrangement for automatic connection of the remote feed current paths of a remote feed loop
09/13/1988	CA1242018A1 On-line serial communication interface from a computer to a current loop
09/13/1988	CA1241993A1 Closed loop transmission system
09/07/1988	EP0281440A1 Signal transmission apparatus, especially for video signals
09/07/1988	EP0281308A2 Decision-directed control circuit and method of adjusting decision-directed apparatus
09/07/1988	EP0281101A2 Circuit for cancelling whole or part of a waveform using non-recursive and recursive filters
09/07/1988	EP0280898A1 Circuit for the suppression of echo signals
09/06/1988	US4769808 Method of cancelling echoes in full-duplex data transmission system
09/06/1988	CA1241723A1 On-line serial communication interface to a transmitter from a current loop
09/06/1988	CA1241719A1 Passive signal coupler between power distribution systems for the transmission of data signals over the power lines
09/06/1988	CA1241710A1 Switched capacitor adaptive line equalizer
09/06/1988	CA1241708A1 Receiver for power line communication systems
09/01/1988	DE3705176A1 Digital signal converter with nonlinear conversion characteristic
08/1988
08/30/1988	US4768206 Data transmission system
08/30/1988	US4768205 Switched capacitor adaptive line equalizer
08/30/1988	US4768204 Method and apparatus for transmitting signals between a master station and a number of terminals
08/30/1988	CA1241386A1 Second order all pass network
08/30/1988	CA1241382A1 Adaptive digital filter
08/24/1988	EP0137806B1 Speakerphone control circuit
08/23/1988	US4766589 Data transmission system
08/23/1988	US4766414 Power line communication interference preventing circuit
08/23/1988	US4766402 Apparatus for matching unbalanced R. F. baseband signals to balanced signals on a twisted two-wire line
08/23/1988	US4766401 Coaxial switching system with switched shields and crosstalk suppression
08/17/1988	EP0168410B1 An improved maintenance termination unit
08/16/1988	US4764980 System for measuring delay time variation in optical fiber digital communication system
08/16/1988	US4764955 Process for determining an echo path flat delay and echo canceler using said process
08/16/1988	US4764938 Circuit and method for correcting distortion in a digital audio system
08/16/1988	CA1240751A1 Systems for bidirectional digital transmission with echo cancellation
08/16/1988	CA1240750A1 Communication network having gain adjustment function of a transmission amplifier of medium attachment unit
08/16/1988	CA1240743A1 System for selectively coupling a plurality of stations into a single communications path
08/11/1988	WO1988005981A1 Tdma communications system with adaptive equalization
08/11/1988	WO1988005979A1 Device for the remote transmission of signals, particularly video signals

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