Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 3 - Line transmission systems
Patents for H04B 3 - Line transmission systems (31,523)
12/1996
12/03/1996US5581229 Communication system for a power distribution line
11/1996
11/28/1996WO1996037971A1 Non-invasive testing of video signals
11/28/1996WO1996034481A3 Adaptive filter for use in a tdm/tdma receiver
11/27/1996EP0744724A1 Device for power supply by wire of a signal transmitter by the signal receiver
11/27/1996EP0744101A1 Method and apparatus for multiuser-interference reduction
11/27/1996EP0744100A1 A system and method for high speed communication of video, voice and error-free data over in-wall wiring
11/27/1996EP0744097A1 Terminating transmission line impedance-matching circuit
11/27/1996CN2241419Y Quasi-duplex converter for intercom
11/27/1996CN1136735A Power user management charging system using power line carrier
11/26/1996US5579344 Adaptive maximum likelihood sequence estimation apparatus and adaptive maximum likelihood sequence estimation method
11/26/1996US5579340 Waveform equalizer
11/26/1996US5579335 Split band processing for spread spectrum communications
11/26/1996US5579305 Asymmetric duplex modem utilizing narrow band echo cancellation
11/26/1996US5579144 Data access arrangement having improved transmit-receive separation
11/26/1996CA2069993C Adaptive maximum likelihood sequence estimator using channel estimators of respective order of impulse response
11/26/1996CA1338742C Method and apparatus for testing twisted-pair interconnections of a high-speed local area network
11/20/1996EP0742972A1 Filtering
11/20/1996CN1136244A Portable telephone circuit tester
11/19/1996US5577117 Methods and apparatus for estimating and adjusting the frequency response of telecommunications channels
11/19/1996US5577097 Determining echo return loss in echo cancelling arrangements
11/19/1996US5577070 Apparatus for generating high power, low energy pulses across the terminals of a large capacity, low impedance battery
11/19/1996US5577027 Apparatus and method for effectively eliminating the echo signal of transmitting signal in a modem
11/19/1996US5576876 Optical regenerator and an optical transmission system
11/19/1996US5576756 Electrical networks for emulating the response or co-axial transmission cable to serial digital video signals
11/14/1996WO1996036133A1 Method and device for transmitting information between a plurality of local units connected to different electricity distribution networks
11/14/1996WO1996036114A1 Bidirectional transmission line driver/receiver
11/14/1996CA2216367A1 Bidirectional transmission line driver/receiver
11/13/1996EP0742664A2 Method for hand-free talking for a multi-channel transmission system
11/13/1996EP0742650A1 Optical fiber telecommunication line comprising amplifiers of the transmitted signals and amplifiers for said line
11/13/1996EP0742649A2 Directional coupler arrangement for the measurement of power
11/13/1996EP0742648A2 Method and apparatus to connect echo cancellers for telephone links
11/13/1996EP0741943A1 Telecommunication system for transmitting full motion video
11/13/1996EP0676108B1 Apparatus and method for fault detection on redundant signal lines via encryption
11/13/1996CN1135692A Echo-eliminating device
11/13/1996CA2176305A1 Hands-free communication method for a multichannel transmission system
11/12/1996US5574749 Line interface apparatus and method for isolating data terminal equipment from the line
11/12/1996US5574748 Spread spectrum communications system for network
11/12/1996CA2079292C Fast response matched filter receiver with decision feedback equalizer
11/12/1996CA2062701C Echo canceller
11/12/1996CA2059493C Feeding system and feeding method for a submarine cable communication system
11/07/1996WO1996035266A1 Adaptive sub-band filtering
11/06/1996EP0741471A1 Non-intrusive measurement of telephone transmission line quality
11/06/1996CN1135136A Telephone subscriber line interface circuit and method
11/06/1996CN1135129A Timing recovery in network-synchronized modem
11/05/1996US5572545 Process for starting up a modem containing a variable-phase echo canceller and modem in which such a process is implemented
11/05/1996US5572262 Receiver based methods and devices for combating co-channel NTSC interference in digital transmission
11/05/1996US5572182 Integrated power and signal transmission system
11/05/1996US5572171 Signal distribution system with plural lines segments in a path and having varying sensitivities
11/05/1996US5572160 Architecture for RF signal automatic test equipment
10/1996
10/31/1996WO1996034481A2 Adaptive filter for use in a tdm/tdma receiver
10/31/1996WO1996034344A1 Adaptive filtering neural network classifier
10/30/1996EP0739780A1 Automobile multiplex communication system
10/30/1996CN2239102Y Inter-region communicating post
10/30/1996CN1134655A Capactive trace coupling for reduction of crosstalk
10/29/1996US5570396 Transmission system comprising receiver with improved timing means
10/29/1996US5570037 Switchable differential terminator
10/29/1996US5570029 Cable crosstalk measurement system
10/29/1996CA2156001A1 Initial phase-loading circuit for a fractionally-spaced linear equalizer
10/23/1996EP0739123A2 Communication unit with residual acoustic echo suppression and method for suppressing residual echoes
10/23/1996EP0739102A2 Subband echo cancellation method using projection algorithm
10/23/1996CN2238508Y Calling device between front and rear seat of motorcycle
10/22/1996US5568558 Adaptive noise cancellation device
10/22/1996US5568064 Bidirectional transmission line driver/receiver
10/22/1996US5568063 Signal transmitting device, circuit block and integrated circuit suited to fast signal transmission
10/16/1996EP0738051A2 Process and device to acknowledge the disabling tone of the echo suppressor in telecommunication systems
10/16/1996CN1133655A A variable block size adaptation algorithm for noise-robust acoustic echo cancellation
10/16/1996CN1133522A Automatic defect detecting mechanism for techician carried test and communication device
10/15/1996US5566210 Data receiving apparatus
10/15/1996US5566203 Intelligent repeater functionality
10/15/1996US5566167 Subband echo canceler
10/15/1996CA2000841C Transmission of data via power lines
10/10/1996WO1996031955A2 Two-way data communicating method and system
10/10/1996DE19513328A1 Merchandise descriptor information display
10/09/1996EP0736995A2 Improvements in or relating to speech recognition
10/09/1996EP0736235A1 Method for determining the location of echo in an echo cancellar
10/09/1996EP0555289B1 Channel equalisation in particular for fading channels
10/09/1996CN2237304Y Vehicle carried person and cart signal communication device for inclined well
10/09/1996CN1132969A Rapid-update adaptive channel-equalization filtering for digital radio receivers, such as HDTV receivers
10/08/1996US5563954 Microphone apparatus
10/08/1996US5563944 Echo canceller with adaptive suppression of residual echo level
10/08/1996US5563921 Jitter detection apparatus using double-PLL structure
10/08/1996US5563911 Equalizer for data receiver apparatus
10/08/1996US5563888 Carrier offset tracking for a receiver using channel impulse response
10/08/1996CA2061078C Adaptive equalizer which carries out an equalization operation with reference to a magnitude of fading
10/03/1996WO1996031012A1 Method of generating a.c. information for a bus system, and transmission unit for carrying out the method
10/03/1996WO1996024926A3 Method and apparatus in coding digital information
10/03/1996CA2216534A1 Transmission stage for generating ac voltage information for a bus system
10/02/1996EP0735716A2 Timing recovery in a network-synchronized modem
10/02/1996EP0735700A2 Communications repeater
10/02/1996EP0735674A2 Method and apparatus for adaptive filtering
10/02/1996EP0734622A1 Surveillance of optical broad-band connection lines up to a passive interface
10/02/1996EP0734620A1 Method and apparatus for signal coupling at medium voltage in a power line carrier communications system
10/02/1996EP0734619A1 Communication network comprising a transceiver
10/02/1996EP0734618A1 Method of mitigating the effects of clipping or quantization in the d/a converter of the transmit path of an echo canceller
10/02/1996EP0484383B1 Digital filter and method of design
10/02/1996CN1132427A Wired transmission intelligence power consumption metering controlling instrument
10/01/1996US5561668 Echo canceler with subband attenuation and noise injection control
10/01/1996US5561424 Data converter with minimum phase fir filter and method for calculating filter coefficients
10/01/1996US5561404 Amplified serial digital cable equalizer circuit having a high return loss
10/01/1996CA2171778A1 Method and apparatus for adaptive filtering
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