Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 3 - Line transmission systems
Patents for H04B 3 - Line transmission systems (31,523)
08/1988
08/09/1988US4763104 Gateway for use in load control system
08/09/1988US4763103 Process and method for wide band transmission, particularly for data transmission over an electricity distribution network
08/09/1988CA1240431A1 Speech additive distribution equipment for conferencing system
08/03/1988EP0276511A1 Adaptive time-descrete filter for forming a cancelling signal from synchronous data symbols
08/03/1988EP0276394A2 Transmission arrangement for digital signals
08/03/1988EP0135512B1 Improved method and means of determining coefficients for linear predictive coding
08/02/1988US4761831 Optical repeaters
08/02/1988CA1240086A1 Method and apparatus for adaptive receiver squelch echo control
08/02/1988CA1240013A1 Control signalling arrangement for a digital transmission system
07/1988
07/28/1988WO1988005621A1 Transmission system
07/28/1988DE3701245A1 Circuit arrangement for a driver stage with galvanically decoupled differential output
07/27/1988EP0275790A1 Terminal for data transmission over an analogous bidirectional line with echo cancellation coupled to the reception clock
07/27/1988CN88100244A Unmanned computerized communication system
07/27/1988CN86206180U Site terminal device for automatic monitoring and controlling network of carrier communication network
07/26/1988US4760596 Adaptive echo cancellation and equalization system signal processor and method therefor
07/26/1988US4760292 Temperature compensated output buffer
07/26/1988US4759631 System for transmission loss comparison
07/26/1988CA1239712A1 Conference circuit for digital communication systems
07/20/1988EP0274850A2 Adaptive digital filters and echo cancelers
07/19/1988US4759037 Passband equalization of modulated quadrature-related carrier signals
07/19/1988US4759036 Decision-directed control circuit
07/19/1988US4759035 Digitally controlled, all rate equalizer
07/12/1988US4757527 Echo canceller
07/12/1988US4757516 Transversal equalizer
07/12/1988US4757502 Automatic gain control method and circuit for a time division multiple access receiver
07/12/1988US4757395 Waveform equalizing circuit
07/12/1988US4757157 Housing for an undersea repeater
07/06/1988EP0273581A2 A method and apparatus for digital compensation and digital equalization
07/05/1988US4755984 Echo canceller for bidirectional digital transmission
07/05/1988US4755771 Equalizing circuit
07/05/1988CA1238956A1 Switched capacitor coupled line receiver circuit
06/1988
06/29/1988EP0272714A1 Adjustable echo canceller
06/29/1988CN87107858A Method of and system for providing substantially error-free transmitted data
06/28/1988US4754419 Adaptive digital filter
06/28/1988CA1238698A1 Programmable automatic cable equalizer
06/21/1988US4752903 Adaptive digital filter for eliminating howling
06/21/1988CA1238382A1 System for bidirectional digital transmission with echo-cancellation
06/21/1988CA1238381A1 Multi-stage echo canceller
06/16/1988DE3641590A1 Phase shift detector
06/15/1988EP0270779A1 All-pass circuit for group delay equalization
06/15/1988EP0270706A1 Method of reducing the convergence time of an echo canceller
06/14/1988US4751730 Process and system for improving echo cancellation within a transmission network
06/14/1988US4751724 Automatic telephone line fault locator
06/14/1988US4751607 Communication line transient protection
06/07/1988CA1237794A1 Diagnostic apparatus
06/07/1988CA1237786A1 Adaptive equalizer
06/02/1988WO1988004116A1 Method and apparatus for equalization of data transmission system
06/01/1988EP0269253A1 RF modem with improved binary transversal filter
06/01/1988EP0268842A1 Adaptive passband equalizer for digital radio relay link systems
05/1988
05/31/1988US4748666 Echo cancelling system
05/31/1988US4748665 Analog echo suppressor
05/31/1988CA1237546A1 Loopback of a pcm signal with loopback command signal bits placed in each frame of the signal as predetermined ones of overhead bits
05/25/1988EP0268391A1 Detecting faults in transmission lines
05/25/1988EP0268205A2 Methods of and system for providing substantially error-free transmitted data
05/25/1988EP0267930A1 Power line communication apparatus.
05/24/1988US4747132 Howling canceller
05/24/1988US4747068 Adaptive filter
05/24/1988US4746902 Arrangement for compensating for non-linear distortion in an input signal to be digitized and an echo cancelling system comprising such a arrangement
05/24/1988US4746897 Apparatus for transmitting and receiving a power line
05/24/1988US4746881 Equalizer for frequency independent and dependent transmission loss components with a pilot used for the frequency independent component
05/19/1988WO1988003733A1 Process and circuit for adaptive correction of pulsed signals
05/18/1988EP0267887A1 Output stage with automatic level control for power line signalling
05/18/1988EP0121557B1 Adaptive filter including controlled tap gain coefficient drift
05/17/1988US4745623 Adaptive transverse equalizer
05/17/1988US4745622 Equalizer for digital transmission systems
05/17/1988US4745392 Noise reduction in signal transmission system over building power distribution wiring
05/17/1988US4745391 Method of, and apparatus for, information communication via a power line conductor
05/17/1988CA1236882A1 Method of detecting hazardous line voltages over a two-wire line
05/11/1988EP0266919A2 Integrated circuit output buffer
05/11/1988EP0266409A1 Apparatus useful in channel equalization adjustment
05/11/1988CN86102546A A method for producing electric impregnate resin with methyl hexahydrobenzene dicarboxylic acid anhydride
05/10/1988US4744093 Method of detecting phase pulse signals from an AC distribution line
05/10/1988US4743901 Signal transmission system
05/10/1988US4743869 Constant resistance loss/slope filter circuit
05/05/1988WO1988003341A1 Echo canceller with short processing delay and decreased multiplication number
05/04/1988EP0265637A2 Pulse shaper
05/04/1988CN87106171A Circuit protector of communication line
05/03/1988US4742510 Near and far echo canceller for data communications
04/1988
04/28/1988DE3249861C2 Control device for controlling the gain of an amplifier
04/27/1988EP0265097A2 Active attenuation system with increased dynamic activity
04/27/1988EP0163685B1 Apparatus for correcting frequency-dependent attenuation of the transmitting medium in signal transmission
04/26/1988US4741025 Speech additive distribution equipment for conferencing system
04/21/1988DE3634564A1 Circuit arrangement for transmitting communication signals
04/21/1988DE3634181A1 Device for error signalling in telecommunications operating stations
04/21/1988DE3634150A1 Device for error signalling in telecommunications operating stations
04/21/1988DE3634133A1 Device for error signalling in telecommunications operating stations and method for manufacturing the device
04/19/1988CA1235540A1 Method and apparatus for accessing communication systems
04/19/1988CA1235539A1 Method and apparatus for configurable line testing
04/12/1988US4737928 High accuracy random channel reproducing simulator
04/12/1988US4737787 Two-wire communication system
04/12/1988US4737724 Variable digital phase-shifter and digital velocity corrector for use in video recorders
04/12/1988US4737658 For power distribution networks
04/12/1988CA1235241A1 Resistive line circuit
04/07/1988WO1988002584A1 Responder unit for energy management system
04/07/1988WO1988002583A1 Energy management system
04/07/1988WO1988002582A1 Echo canceller with adaptive dynamically positioned taps
04/06/1988EP0262911A2 System for transmission loss comparison
04/06/1988EP0262860A2 Digital signal analysis by transformation to vector domain
04/06/1988EP0262659A2 Receiver
04/06/1988EP0262644A2 QAM Demodulator with rapid resynchronization function
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