Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 3 - Line transmission systems
Patents for H04B 3 - Line transmission systems (31,523)
12/1999
12/07/1999CA2025710C Dsp line equalizer
12/02/1999WO1999061927A1 Method for detecting the position of defective shielding of a coaxial cable or connector in a coaxial cable network
12/02/1999DE19824408A1 Empfänger für ein digitales Übertragungssystem A receiver for a digital transmission system
12/02/1999DE19823234A1 Vorrichtung und Verfahren zur Datenübertragung bzw. Signalauskopplung bei Stromleitern Apparatus and method for data transmission or signal output at current conductors
12/02/1999CA2333520A1 Method for detecting the position of defective shielding of a coaxial cable or connector in a coaxial cable network
12/01/1999EP0961449A2 Digital subscriber line communicating system
12/01/1999EP0961415A1 Method and apparatus for data transmission respectively signal coupling to mains wiring
12/01/1999EP0960521A1 Apparatus and method for adapting an echo canceller in a communication system
12/01/1999EP0960520A1 Method for automatically adapting levels of signals exchanged in a communication network
12/01/1999EP0713625A4 An audio processing system for teleconferencing
12/01/1999CN1237047A Shock wave absorber for RF wired transmission system
12/01/1999CN1047044C Remote control and telecommunication method
11/1999
11/30/1999US5995620 Echo canceller having Kalman filter for optimal adaptation
11/30/1999US5995567 Radio frequency noise canceller
11/30/1999US5995566 Interference reduction in telecommunication systems
11/30/1999US5995565 Co-channel interference reduction
11/30/1999US5995545 Signal reproducing method and apparatus
11/30/1999US5995544 Adaptive equalization for PRIV transmission systems
11/30/1999US5995493 Transmission of a digital information signal having a specific first sampling frequency
11/30/1999US5995021 Communicator for field instruments and method for supplying power to this communicator
11/30/1999US5994998 Power transfer apparatus for concurrently transmitting data and power over data wires
11/30/1999US5994946 Alternating inverters for capacitive coupling reduction in transmission lines
11/25/1999WO1999060720A2 Echo cancellation in digital data transmission system
11/25/1999WO1999060719A1 Combined analog/digital data transmission system
11/25/1999WO1999060671A1 Contact pair arrangement for an electric plug-and-socket connection in order to compensate near-end crosstalk
11/25/1999DE19820909A1 Circuit arrangement of data processing device
11/25/1999DE19820760A1 Wide-band communications system especially for in-house multimedia data communication
11/25/1999CA2332902A1 Combined analog/digital data transmission system
11/25/1999CA2331623A1 Arrangement of contact pairs for compensating near-end crosstalk for an electric plug connection
11/24/1999EP0959596A1 Method and circuit for training an adaptive equalizer
11/24/1999EP0959569A1 Method and apparatus for signal coupling in high or middle voltage cable
11/24/1999EP0958668A2 Method and device for signal repetition
11/24/1999EP0729670A4 A bidirectional amplifier
11/24/1999EP0691059A4 Secure access telephone extension system and method
11/24/1999CN1236511A Method of optimizing transmission and transmitter
11/23/1999US5991311 Time-multiplexed transmission on digital-subscriber lines synchronized to existing TCM-ISDN for reduced cross-talk
11/18/1999WO1999059336A1 Data processing device
11/18/1999WO1999059323A1 Methods and apparatus for verifying transmit power levels in a signal point limited transmission system
11/18/1999WO1999059320A1 A method and system for scaleable near-end speech cancellation for tip and ring tone signal detectors
11/18/1999WO1999059261A1 Wide-band communication system
11/18/1999WO1999059260A1 Method and array for echo compensation in partial bands
11/18/1999WO1999058987A1 Method for transmitting and storing value and value store electric power meter using the same
11/18/1999DE19921758A1 Digitaler Teilnehmerleitungsempfänger Digital subscriber line receiver
11/18/1999DE19821045A1 Vorrichtung und Verfahren zur Signaleinkopplung in Hoch- und Mittelspannungsleitungen Apparatus and method for signal injection into high and medium voltage cables
11/18/1999DE19820690A1 Echo cancellation method for hybrid circuit
11/18/1999CA2332113A1 Method for transmitting and storing value and value store electric power meter using the same
11/18/1999CA2331892A1 A method and system for scaleable near-end speech cancellation for tip and ring tone signal detectors
11/17/1999EP0957595A2 Signal-to-noise ratio monitoring apparatus and method in optical signals
11/17/1999EP0956691A1 Passive distributed filter system and method
11/17/1999EP0956658A1 Method and apparatus for using state determination to control functional elements in digital telephone systems
11/17/1999EP0956657A1 Dynamic echo canceller and parameter selection in telephony systems
11/17/1999EP0956656A1 Bi-directional asynchronous telecommunication audio signal processing
11/17/1999EP0956631A2 Power line transmission
11/17/1999EP0956217A1 Method for data transmission in a vehicle
11/17/1999EP0705501B1 Method and apparatus for testing telecommunications equipment using a reduced redundancy test signal
11/17/1999CN1235717A Method and arrangement for adapting, from DC point of view, first circuit to at least one second circuit
11/17/1999CN1235457A Adaptive equalizer
11/17/1999CN1235434A Receiving apparatus and transmitting/receiving system
11/17/1999CN1235433A High-speed ring connecting system for digital users
11/16/1999US5987143 Method and apparatus for erasing acoustic echo
11/16/1999US5987098 Method and system for sparing echo cancellers
11/16/1999US5986539 Hafe-duplex two-wire DC power-line communication system
11/15/1999CA2271978A1 Method and circuit for training the tap coeficient of adaptive equalizer
11/11/1999WO1999057878A1 Magnetic field based power transmission line communication method and system
11/11/1999WO1999057402A1 Drive system for a partition wall system
11/11/1999WO1998057440A3 Data transmission over a power line communications system
11/11/1999DE19819906A1 Interface circuit for ISDN telecommunications network
11/10/1999EP0955766A2 Voice and data modem
11/10/1999EP0954910A1 Rf communication signal distribution system and method
11/10/1999CN1234935A Method and device for blind equalizing of transmission channel effects on digital speech signal
11/10/1999CN1234669A Predistortion method and unit for signals transmitted between two units of telecommunication network
11/09/1999US5983076 Antenna unit for communication system for movable body
11/09/1999US5983070 Method and system providing increased antenna functionality in a RF distribution system
11/09/1999US5982818 Method for implementing trellis codes for ISI channels
11/09/1999US5982276 Magnetic field based power transmission line communication method and system
11/09/1999US5982215 Analog signal transmission circuit
11/09/1999US5982192 High speed bus circuit system
11/04/1999WO1999056140A1 Method and device for monitoring an electrode line of a bipolar high voltage direct current (hvdc) transmission system
11/03/1999EP0954114A2 Linear attenuation equalizer and method for designing same
11/03/1999EP0954110A2 Loop-back circuit for duplex transceiver
11/03/1999EP0953234A2 Circuit for two-wire / four-wire conversion
11/03/1999EP0953233A1 Disabling tone detector for network echo canceller
11/03/1999CN1233887A Signal transmission method and device using power line
11/02/1999US5978824 Noise canceler
11/02/1999US5978783 Feedback control system for telecommunications systems
11/02/1999US5978473 Gauging convergence of adaptive filters
11/02/1999US5978417 Adaptive cable equalizer
11/02/1999US5978415 Automatic amplitude equalizer
11/02/1999US5978382 Adaptive random access protocol and fixed search tree expansion resolution for multiple station networks
11/02/1999US5977865 Bit encoding in home control systems
11/02/1999US5977650 Transmitting communications signals over a power line network
10/1999
10/28/1999WO1999040685A3 Method for processing telephone signals delivered by an analog telephone terminal
10/28/1999WO1999005820A3 Wireless communications system and method
10/27/1999EP0952694A2 Optical cross-connect restoration technique
10/27/1999EP0952682A2 CDMA mobile communications system and method with improved channel estimation and pilot symbol transmission
10/27/1999EP0952681A2 Capacitive coupling cable for signal coupling onto power lines
10/27/1999EP0952680A1 Transmission of an operation mode signal via an AC supply line
10/27/1999EP0952679A2 Far end cross talk (FEXT) compensation
10/27/1999EP0951798A1 Acoustic feedback correction
10/27/1999EP0951795A1 Multipoint control system
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