Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 3 - Line transmission systems
Patents for H04B 3 - Line transmission systems (31,523)
09/1999
09/01/1999EP0901728A4 Method and apparatus for integration telephone and broadband netwroks
09/01/1999EP0901719A4 Non-linear reciprocating device
08/1999
08/31/1999US5946352 Method and apparatus for downmixing decoded data streams in the frequency domain prior to conversion to the time domain
08/31/1999US5946350 Data receiving system using a decision feedback equalizer
08/31/1999US5946118 Communication collision detection
08/31/1999US5944842 Method and apparatus for data encoding and communication over noisy media
08/26/1999WO1999043156A1 An image transfer device
08/26/1999DE19856020A1 Electronic networks provision unit for data processing devices with additional properties
08/26/1999DE19806015A1 Verfahren zur Verbesserung der akustischen Rückhördämpfung in Freisprecheinrichtungen A method for improving the acoustic sidetone suppression in hands-free
08/25/1999EP0938215A2 Adaptive DC-compensation
08/25/1999EP0938214A2 Automatic equalization method and automatic equalizer
08/25/1999EP0938191A2 Hybrid amplifier
08/25/1999EP0876667A4 Ground skew protection method and apparatus
08/25/1999CN2335315Y Grouping type carrier telephone
08/24/1999US5943645 Method and apparatus for computing measures of echo
08/24/1999US5943604 Echo device method for locating upstream ingress noise gaps at cable television head ends
08/24/1999US5943392 Device for measuring echo return loss in a two-two wire line system
08/24/1999US5943368 Transmission, recording and reproduction of a digital information signal
08/24/1999US5943367 Transmission system using time dependent filter banks
08/24/1999US5943366 Method of generating A.C. information for a bus system, and transmission unit for carrying out the method
08/24/1999US5943232 Autonomous overload control for distributed real time systems
08/19/1999WO1999041898A1 Method for improving acoustic noise attenuation in hand-free devices
08/19/1999WO1999041897A2 Method for improving acoustic noise attenuation in hand-free devices
08/19/1999WO1999041848A1 Methods and apparatus for controlling filter adaption in noise
08/19/1999WO1999041839A1 A method and device for nonlinear likelihood sequence estimation
08/19/1999WO1999027614A3 Connector and method of connection
08/18/1999EP0936781A1 Method for pre-distorting signals transmitted over non-reciprocal channels
08/18/1999EP0936750A2 Communication line
08/18/1999EP0935850A1 System connector
08/18/1999CN1226349A Echo canceler for non-linear circuit
08/17/1999US5940792 Nonintrusive testing of telecommunication speech by determining deviations from invariant characteristics or relationships
08/17/1999US5940499 Voice switch used in hands-free communications system
08/17/1999US5940455 Adaptive filter with disabling circuit for fast tap weight convergence
08/17/1999US5940442 High speed data receiver
08/17/1999US5940440 Generalized multimodulus technique for blind equalization
08/17/1999US5940436 Circuit for allocating a transmission channel on the electric network
08/17/1999US5940018 nB2P coding/decoding device
08/17/1999US5939990 Method of indicating operation of backup battery and circuit for sensing the same
08/17/1999US5939887 Method for measuring spectral energy interference in a cable transmission system
08/17/1999US5938151 Communication systems employing power cables for conveyor carriages
08/17/1999CA2155220C Secure access telephone extension system and method
08/17/1999CA2138697C System and method for adaptive maximum likelihood sequence estimation
08/16/1999CA2260282A1 A method for predistortion of a signal transmitted between two units of a telecommunications network and a unit for carrying out the method
08/12/1999WO1999040685A2 Method for processing telephone signals delivered by an analog telephone terminal
08/12/1999WO1999003209A3 Coupling communications signals to a power line network
08/12/1999DE19805942C1 Verfahren zur Verbesserung der akustischen Rückhördämpfung in Freisprecheinrichtungen A method for improving the acoustic sidetone suppression in hands-free
08/11/1999EP0935355A2 A system and method for monitoring and characterizing optical links
08/11/1999EP0935348A2 Cable branching unit
08/11/1999EP0934632A2 A method and an arrangement for adapting, from a dc point of view, a first circuit to at least one second circuit
08/10/1999US5937379 Canceler of speech and noise, and speech recognition apparatus
08/10/1999US5937342 Wireless local distribution system using standard power lines
08/10/1999US5937126 Optically amplifying/repeating transmission system and optical amplifier
08/10/1999US5937009 Sub-band echo canceller using optimum wavelet packets and cross-band cancellation
08/10/1999US5937005 Error rate measurement apparatus for a mobile radio communications system
08/10/1999US5937003 Adaptive reference pattern for spread spectrum detection claims
08/05/1999WO1999039497A1 Generating calibration signals for an adaptive beamformer
08/05/1999WO1999039453A2 A method for cancelling echoes in a communication system, a communication device, and a radio base station of a cordless telephone device
08/05/1999WO1999012258A3 Audio frequency ripple control transmitter with a pulsed a.c. rectifier provided with a capacitive accumulator
08/05/1999WO1997029560A8 Remotely controlling and determining electrical device status
08/04/1999EP0933883A2 Method and device for the determination of the transferfunction of transmitting media
08/04/1999EP0932964A1 Method and device for blind equalizing of transmission channel effects on a digital speech signal
08/04/1999EP0932959A1 Distributed serial control system
08/04/1999EP0932943A1 Interface device of bi-directional connection of currents carrying low voltage/radiofrequency
08/04/1999EP0894369A4 Distribution of radio-frequency signals through low bandwidth infrastructures
08/04/1999EP0659312A4 Decision feedback equalizer method and apparatus.
08/03/1999US5933797 Adaptive dual filter echo cancellation
08/03/1999US5933494 Echo canceling method and apparatus in a communication device
08/03/1999US5933415 Circuit for transmitting binary data on the electric network using several transmission channels
08/03/1999US5933270 For an optical transmission line
08/03/1999US5933073 Apparatus and methods for power network coupling
08/03/1999US5933072 For an electrical distribution system
08/03/1999US5933071 Communications apparatus
08/03/1999US5931703 Low crosstalk noise connector for telecommunication systems
08/03/1999CA2089154C Automatic frequency control by an adaptive filter
07/1999
07/29/1999WO1999038363A1 Method and apparatus for controlling lights and other devices
07/29/1999WO1999038323A1 Catv power inserter
07/29/1999WO1999038084A1 Method and apparatus for universal data exchange gateway
07/29/1999WO1999038023A1 Testing of catv systems
07/29/1999CA2318926A1 Method and apparatus for universal data exchange gateway
07/29/1999CA2315759A1 Testing of catv systems
07/29/1999CA2283941A1 Method and apparatus for controlling lights and other devices
07/28/1999EP0932264A1 Transmitter suitable for the transmission of digital data to a receiver by means of a frequency modulated signal on an AC power supply line
07/28/1999EP0931411A1 Data communication using power lines
07/28/1999EP0906668A4 Apparatus for automatic sensing of line amplifier configuration for status monitoring
07/28/1999EP0872028A4 Spectral noise compensation for echo cancellation
07/28/1999EP0597067B1 Circuit for coupling a transmitter unit to a transmission line
07/28/1999CN1224549A Distribution of radio-frequency signals through low bandwidth infrastructure
07/28/1999CN1224283A Monitor information transmitting/receiving apparatus in submarine cable system
07/27/1999US5930692 Method and apparatus for increasing receiver immunity to interference
07/27/1999US5930682 Centralized channel selection in a distributed RF antenna system
07/27/1999US5930414 In an optical transmission fiber
07/27/1999US5930348 Dynamically controlled routing of calls in intelligent networks
07/27/1999US5930310 Data signal demodulator
07/27/1999US5929750 Transmission network and filter therefor
07/27/1999US5929749 System for improved communication and control over power lines
07/27/1999US5929748 Automated home control using existing electrical lines as a communications medium
07/27/1999US5927657 Antenna mounting structure for movable member conveying system
07/22/1999WO1999037068A1 Method and apparatus for tracking the characteristics of a channel
07/22/1999WO1999037038A1 Method for setting up echo suppression devices in communication links with automatic machines
07/22/1999WO1999037028A1 Vibration wave encoding method and method
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