Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 3 - Line transmission systems
Patents for H04B 3 - Line transmission systems (31,523)
11/2003
11/12/2003EP1361669A1 Noise elimination method and apparatus
11/12/2003EP1360707A1 Dsl compatible load coil
11/12/2003EP1002404B1 Truncated maximum likelihood sequence estimator for wireless local area networks
11/12/2003CN2586304Y Power line carrier narrow band transmission multi-route integrated business digital information system
11/12/2003CN2586303Y Holding-free receiver putting on arm
11/12/2003CN1455989A Double-talk and path change detection using matrix of correlation coefficients
11/12/2003CN1455572A Improved sound-echo elimination
11/12/2003CN1127815C Arrangement in a subscriber line interface circuit
11/12/2003CN1127814C Dynamic echo canceller and parameter selection in telephony systems
11/12/2003CN1127813C Double talk and echo path change detection in telephony system
11/11/2003US6647211 Remote control device of acousto-optic tunable filter and optical transmission system containing equalizer using acousto-optic tunable filter and optical transmission system containing optical add/drop multiplexer using acousto-optic tunable filter
11/11/2003US6647067 Method and device for reducing crosstalk interference
11/11/2003US6647065 Process aimed at the extraction of electrical signals, without breaking a line pair
11/11/2003US6647058 Performance customization system and process for optimizing XDSL performance
11/11/2003US6646519 RF equalizer
11/11/2003US6646447 Identifying one of a plurality of wires of a power transmission cable
11/06/2003WO2003092201A2 Interference-free lms-based adaptive asynchronous receiver
11/06/2003WO2003092185A1 Method and system for electric feeding and control of an electrical device
11/06/2003WO2003092184A1 Echo cancellation
11/06/2003WO2003091855A2 Power line communications system and method for providing multiple services from an isolated power generating plant
11/06/2003US20030208717 Skew calibration means and a method of skew calibration
11/06/2003US20030208707 Method and apparatus for evaluating and optimizing a signaling system
11/06/2003US20030206625 Tone detection and echo cancellation in a communications network
11/05/2003EP1358762A1 Multi-band coax extender for in-building digital communication systems
11/05/2003EP1358755A2 Crosstalk identification in xdsl systems
11/05/2003EP1358737A2 Loop extender with selectable line termination and equalization
11/05/2003EP1358731A1 Line powered loop extender with communications, control, and diagnostics
11/05/2003EP1358720A2 Methods for transmitting a waveform having a controllable attenuation and propagation velocity
11/05/2003EP1236290B1 Coupling device
11/05/2003EP0965180B1 Remote control apparatus for power line communications system
11/05/2003EP0917789B1 Dc suppression for pcm modems
11/05/2003EP0755601B1 Improved adsl compatible discrete multi-tone apparatus
11/05/2003CN2585494Y Point-to-point digital signal communication system for deep sea long-distance use
11/05/2003CN2585493Y Deep sea communication device based on two-line network
11/05/2003CN2585492Y Calling and speaking device with function of displaying position of hospital bed
11/05/2003CN1454436A Method for the assembly of mobile radio network base station and connection of the base station to the network
11/05/2003CN1454414A 耦合装置 Coupling device
11/05/2003CN1453782A Signal processing apparatus
11/05/2003CN1453182A Bicycle control for transmitting electric energy and data on single transmitting path
11/05/2003CN1127261C Data processing device
11/05/2003CN1127236C Bidirectional communication system having symmetrical transmission rates
11/05/2003CN1127180C Modular plug with automatically staggered arrangement wires
11/04/2003US6643271 Adjustable gain transmit cancellation in a full-duplex modem data access arrangement (DAA)
10/2003
10/30/2003WO2003090374A1 High-speed signal transmission system
10/30/2003WO2003090350A1 Equalizer mode switch
10/30/2003WO2003090349A1 Equalizer status monitor
10/30/2003WO2003090348A1 Decision feedback equalizer
10/30/2003WO2003063380A3 Method of and system for power line carrier communications
10/30/2003WO2003050376A3 Burst qam downhole telemetry system
10/30/2003WO2003044967A3 Power line communication system with autonomous network segments
10/30/2003WO2003017505A3 Adaptive radiated emission control
10/30/2003WO2003015291A3 Frequency management and policing
10/30/2003WO2002087104A3 Method for multiple access and transmission in a point-to-multipoint system over an electrical network
10/30/2003US20030202654 Acoustic echo cancellation
10/30/2003US20030202459 Blind crosstalk cancellation for multicarrier modulation
10/30/2003US20030201873 High current inductive coupler and current transformer for power lines
10/30/2003US20030201759 Full duplexing for power line data communications
10/30/2003DE10221343C1 Control device for camera and/or electronic dimmer incorporated in operating theatre lamp using voltage supply line for supplying control signals to and from camera and/or electronic dimmer
10/30/2003DE10163614C2 Verfahren zur Signalübertragung für die Magnetschwebebahn A method of signal transmission for the maglev
10/29/2003EP1357731A2 Switchable hybrid design for asymmetric digital subscriber line
10/29/2003EP1357702A1 Method to test the broadband access for a subscriber connection line
10/29/2003EP1357680A1 Power line communication system
10/29/2003EP1357679A1 Power feed
10/29/2003EP1357678A1 Bicycle control apparatus that communicates power and data over a single transmission path
10/29/2003EP1357553A1 Adaptive equalizing circuit and regenerative device using it, and adptive equalizing method
10/29/2003EP1356589A1 Asymmetric multichannel filter
10/29/2003CN2583885Y Power line 3 phase high frequency wide-band network connector
10/29/2003CN2583884Y Improved structure of communication line
10/29/2003CN2583883Y Multifunctional digital information terminal with long distance wired remote-control ability
10/29/2003CN1452848A House code setting method and power line transport communication system
10/29/2003CN1452835A Termination device for telephone line
10/29/2003CN1452817A Method and apparatus employing wireless in-band signaling for downlink transmission of commands
10/29/2003CN1452816A Method and system for transmitting data over low-voltage electricity suppy network
10/29/2003CN1452365A Demodulating
10/29/2003CN1126289C Repeater apparatus having isolation circuit
10/29/2003CN1126286C Method and apparatus for echo estimation and suppression
10/29/2003CN1126049C Adaptive dual filter echo cancellation and use method thereof
10/28/2003US6639987 Communication device with active equalization and method therefor
10/28/2003US6639947 EMI reduction for isolated bus systems
10/28/2003CA2311051C Method and apparatus for canceling echo
10/23/2003WO2003088574A1 Method for testing subscriber connection lines for broadband services
10/23/2003WO2003088517A1 Receiver using a multi-layer non-radiative dielectric waveguide
10/23/2003WO2003087986A2 Crosstalk masking for digital subscriber loops
10/23/2003WO2003087964A1 Measuring device used in process technology, comprising a central power supply unit
10/23/2003US20030200082 Voice signal processing system mounted with echo canceller and voice signal processing method
10/23/2003US20030200001 Method to synchronize playback of multicast audio streams on a local network
10/23/2003US20030198165 Signal processor
10/23/2003US20030197480 Bicycle control apparatus that communicates power and data over a single transmission path
10/23/2003US20030197426 Remotely accessible power controller for building lighting
10/22/2003EP1355463A2 Adjustment of a transversal filter
10/22/2003EP1181771B1 Broadcast transmission system with distributed correction
10/22/2003EP1142151B1 A remote feeder reactance coil
10/22/2003EP1080518B1 Contact pair arrangement for an electric plug-and-socket connection in order to compensate near-end crosstalk
10/22/2003EP0882361B1 Wideband signal distribution system
10/22/2003CN2582280Y Self-adapting echo cancellation device able to automatically compensate delay and two ends detect
10/22/2003CN2582278Y Series, domestic distributing box for multi-media set
10/22/2003CN1451242A Multimode apparatus with communication and control features
10/22/2003CN1451226A Method and device for acoustic echo cancellation combined with adaptive beamforming
10/22/2003CN1451225A Echo cancellation device for cancelling echos in a transceiver unit
10/22/2003CN1451207A Coupling of a Head station to a Low-voltage power supply network
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