Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 3 - Line transmission systems
Patents for H04B 3 - Line transmission systems (31,523)
09/1985
09/17/1985US4542358 Device protecting a coaxial cable against high-powered, low-frequency spurious pulses
09/17/1985US4542265 Echo canceller dynamic range extension
09/17/1985CA1193698A1 Call coverage arrangement
09/17/1985CA1193677A1 Device for the protection of a coaxial cable against low frequency, high power interference pulses
09/11/1985EP0154086A2 Data recovery circuit
09/10/1985US4540952 Nonintegrating receiver
09/10/1985CA1193326A1 Microwave oven with rotary antenna
09/03/1985US4539690 Automatic and adaptive digital nonlinear decision feedback equalizer
09/03/1985US4539675 Echo canceller
09/03/1985US4539674 In a telecommunications system
09/03/1985CA1192959A1 Methods and apparatus for transmitting high-bit-rate digital data in power line communication media
08/1985
08/28/1985EP0153165A2 Apparatus and method for sampling multiple carrier signals
08/28/1985EP0152423A1 Maintenance response signalling arrangement for a digital transmission system.
08/27/1985US4538180 System for non linearity correction by intermediate frequency premodulation in television equipment
08/27/1985US4538136 Power line communication system utilizing a local oscillator
08/27/1985US4538031 Service circuit for a local telephone line
08/27/1985CA1192634A1 Coupling an electrical signal to transmission lines
08/21/1985EP0152172A1 Adaptive digital filter
08/21/1985EP0152151A1 Broadband control amplifier
08/21/1985EP0151803A2 Circuit arrangement for adapting an amplifier with an inductance in the emitter circuit to a filter with an input inductance
08/21/1985EP0151616A1 Control signalling arrangement for a digital transmission system.
08/20/1985US4536888 Voice communication instrument system with line-powered receiver conditioning circuit
08/20/1985US4536740 Doublet detector for data recording or transmission
08/20/1985CA1192270A1 Method and circuit for detecting a training signal
08/15/1985WO1985003607A1 Method to test the function of an adaptive echo canceller
08/14/1985EP0151453A2 Correction device for first and second order amplitude distortion of the spectrum of a digital signal
08/13/1985US4535447 Remote monitoring system transmitter
08/13/1985US4535443 Terminal arrangement for a duplex transmission system
08/13/1985US4535206 Echo cancellation in two-wire full-duplex data transmission with estimation of far-end data components
08/06/1985US4534039 Dataset powered by control and data signals from data terminal
08/06/1985US4534038 Coupling an electrical signal to transmission lines
08/06/1985CA1191640A1 Test device for locating faults in a two-lead line
08/06/1985CA1191570A1 Partial band - whole band energy discriminator
08/06/1985CA1191553A1 Test system for locating short circuits and open circuits in a two-lead line
07/1985
07/31/1985EP0149794A1 Adjustable delay equalizer
07/31/1985EP0149793A1 Delay equalizer with continuously or stepwise adjustable delay characteristics
07/30/1985US4532384 For terminating a two wire communication line
07/30/1985US4532379 Facsimile relaying method
07/30/1985EP0122939A4 An active delay equalizer section having independently tunable circuite parameters and a circuit and method for correcting for phase distortion in a digital audio system.
07/30/1985CA1191224A1 Method of providing adaptive echo cancellation in transmission of digital information in duplex, and apparatus for performing the method
07/30/1985CA1191214A1 Automatic level control circuit
07/24/1985EP0149546A2 Receiver for power line communication systems
07/24/1985EP0149495A2 Signal transmission system
07/24/1985EP0149095A2 Method for examining signal level-dependent properties of transmission apparatuses especially of signal level-dependent attenuation distorsions of CODEC's for PCM circuis, and device for the application of said method
07/23/1985US4531220 Receiver for a data transmission modem, comprising an echo canceller and an equalizer
07/23/1985CA1190984A1 Arrangement for avoiding undsirable oscillations in a closed-loop system and loud-speaking telephone set employing this arrangement
07/16/1985US4530085 Reconfiguration control method for a loop-type data network
07/16/1985US4529979 Remote return loop control in a data transmission system
07/16/1985US4529970 Supervision system for monitoring the integrity of a transmission line
07/16/1985US4529904 Piezo-electric terminal station for communications system
07/16/1985US4529847 Maintenance termination unit
07/16/1985CA1190683A1 Voice communication instrument system with line- powered receiver conditioning circuit
07/16/1985CA1190613A1 Line equalizer
07/16/1985CA1190607A1 Signal cuber
07/10/1985EP0147550A1 Equalization circuits for magnetic recording channels
07/10/1985EP0048746B1 Automatic meter reading system
07/09/1985US4528677 Data transmission system
07/09/1985US4528676 Echo cancellation circuit using stored, derived error map
07/09/1985US4528667 System for the transmission of information messages
07/09/1985US4528519 Automatic gain control
07/09/1985US4528427 Test system and device for locating short circuits and open circuits in a two-lead line
07/03/1985EP0146979A1 Method and system for determining the optimum position of the reference coefficient of an adaptive equalizer
07/02/1985US4527261 Hiline interference eliminator
07/02/1985US4527073 Shielded electrical cable system
07/02/1985US4527020 Echo canceller for a long-distance telephone network
07/02/1985CA1189926A1 Arrangement for cancelling echo signals
06/1985
06/26/1985EP0146175A1 Device for localizing a signal-reflecting point on a transmission line
06/26/1985EP0146045A2 Digital data transceiver for power line communications system
06/25/1985US4525845 Balanced circuit for connecting receiver and transmitter to transmission line
06/20/1985WO1985002740A1 An improved maintenance termination unit
06/19/1985EP0145022A2 Method and apparatus for cancelling echo
06/18/1985US4524446 Signal quality monitor for protective relay system
06/18/1985US4524422 Digital equalizer capable of varying the center frequency, quality factor, and gain to perform various frequency characteristics
06/18/1985US4524337 Variable amplitude delay equalizer
06/12/1985EP0144067A2 Method and circuit for compensating cross-talk and/or echo signals
06/11/1985US4523307 Power line carrier multi telephone extension system for full duplex conferencing and intercom between telephones
06/11/1985CA1188761A1 Single terminal negative capacitance generator for response time enhancement
06/10/1985EP0135512A4 Improved method and means of determining coefficients for linear predictive coding.
06/06/1985WO1985002509A1 Apparatus for correcting frequency-dependent attenuation of the transmitting medium in signal transmission
06/06/1985EP0089350A4 Electronic terminator circuit.
06/05/1985EP0143616A2 Hybrid circuit
06/05/1985EP0143254A1 Circuitry for controlling the transmission ability of the receiving branch of a transmission device
05/1985
05/28/1985US4520508 Subscriber terminal for monitoring radio-frequency signal ingress into cable television systems
05/22/1985EP0142304A1 Echo eliminator
05/22/1985EP0142144A2 Fractionally spaced equalization method and equalizer using nyquist-rate coefficient updating
05/21/1985US4518927 Signal processing system comprising a signal source, a signal processing unit and connecting cables
05/21/1985CA1187587A1 Facility for monitoring the level of a radio- frequency signal
05/21/1985CA1187569A1 Adaptive if equalizer for digital transmission
05/21/1985CA1187563A1 Digital adaptive finite impulse response filter with large number of coefficients
05/15/1985EP0141673A2 Filtering electrical signals
05/15/1985EP0141583A2 Adaptive filterbank
05/15/1985EP0141441A1 Communication receiving unit for the suppression of noise and interference signals
05/14/1985US4517548 Transmitter/receiver circuit for signal transmission over power wiring
05/08/1985EP0140809A1 Echo correction apparatus, particularly for a television data transmission system
05/08/1985EP0139814A2 Active equalizer circuit
05/07/1985US4516269 Automatic equalization for a simulcast communication system
05/07/1985CA1186826A1 Loudspeaker telephone system
05/07/1985CA1186764A1 Echo canceler
05/07/1985CA1186762A1 Device for minimizing far-end crosstalk between half- duplex digital transmission lines
05/07/1985CA1186739A1 Tester for remote controlled radio systems
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