Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 3 - Line transmission systems
Patents for H04B 3 - Line transmission systems (31,523)
12/2003
12/31/2003CN1133325C Ingress noise measuring device in data communication network using CATV network
12/31/2003CA2485283A1 Ultra-wideband communication through a wire medium
12/30/2003US6671501 Signal transmission circuit
12/30/2003US6671464 Polarization mode dispersion compensator and compensation method
12/30/2003US6671374 Adaptive filter for echo cancellation, method for operating an adaptive filter for echo cancellation, an article of manufacture for determining tap weights and a length for an adaptive filter for echo cancellation and a computer implemented control system for determining tap weights and a length for an adaptive filter for echo cancellation
12/30/2003US6671314 Decision feedback equalizer for a digital signal receiving system
12/25/2003US20030235312 Method and apparatus for tone indication
12/25/2003US20030235295 Method and apparatus for non-linear processing of an audio signal
12/25/2003US20030235294 Method and apparatus for pure delay estimation in a communication system
12/25/2003US20030235244 Method and apparatus for performing adaptive filtering
12/25/2003US20030235236 Ultra-wideband communication through a wired medium
12/25/2003US20030234713 Power line coupling device and method of using the same
12/25/2003US20030234701 Four-drop bus with matched response
12/25/2003US20030234113 Twin-wire line
12/24/2003WO2003107639A1 Method and circuit arrangement for recognising load coils
12/24/2003WO2003107560A1 Medium-voltage isolated capacitive coupling system
12/24/2003WO2003107559A1 Method and device for determining the electrical properties of a data line
12/24/2003WO2003107558A1 Method and circuit arrangement for determining transmission parameters
12/24/2003WO2003107557A1 Method, apparatus, and system for reducing memory requirements for echo cancellers
12/24/2003WO2003107556A1 Digital echo canceller
12/24/2003WO2003106813A1 Integrated communications and power system
12/24/2003WO2003040732A3 Impedance stabilization network for determining the electromagnetic interfering radiation of a modem
12/24/2003WO2003039115A3 Device and method for carrying out multichannel acoustic echo cancellation with a variable number of channels
12/24/2003WO2003026350A3 Audio distributor
12/24/2003CN1463525A Appts. and method for decision feedback sequence estimation for reduction of error propagation in decision feedback equalizer
12/24/2003CN1463524A Circuit and method for reducing performence loss related to feedback loop delay in decision feedback equaliser
12/24/2003CN1132337C Method and device of estimating timing position of data sub-frame received in data stream
12/24/2003CN1132330C Filter allocation adaptive for ADSl shunt device
12/24/2003CA2487183A1 Digital echo canceller
12/23/2003US6668328 Computer system having a power supply for coupling signals to a power line network and transmitting infrared signal to at least one peripheral card
12/23/2003US6668058 Power line telephony exchange
12/23/2003US6668027 Self adjusting automatic gain control (AGC) power reference level circuit
12/23/2003US6667685 Power line noise filter
12/18/2003WO2003105431A1 A method and system for providing a time equalizer for multiline transmission in communication systems
12/18/2003WO2003105374A1 Receiver signal strength indication
12/18/2003WO2003105369A1 Method and system for providing an analog front end for multiline transmission in communication systems
12/18/2003WO2003105365A1 Device for the wideband electrical connection of two units which can be displaced in relation to each other
12/18/2003WO2003105352A2 A method and system for providing window shaping for multiline transmission in a communications system
12/18/2003WO2003105339A1 Multiline transmission in communication systems
12/18/2003WO2003105336A1 Distortion compensator
12/18/2003WO2003063459A3 Power line communication system combining high bitrate and low bitrate transmissions
12/18/2003WO2003063372A3 Crosstalk mitigation in a modem pool environment
12/18/2003WO2002063880A8 Multi-band coax extender for in-building digital communication systems
12/18/2003US20030232599 Method for transmitting high-frequency signals to low-frequency networks and corresponding system
12/18/2003US20030231763 Method and apparatus for canceling echo in a telephone communication system
12/18/2003US20030231762 Communication system for controlling training of echo canceller and line switching system
12/18/2003US20030231761 Echo analysis for identification of hybrid induced echo in a communication link
12/18/2003US20030231617 Method, apparatus, and system for reducing memory requirements for echo cancellers
12/18/2003US20030231603 Crosstalk masking for digital subscriber loops
12/18/2003US20030231516 Power feed
12/18/2003US20030231023 Modeling and calibrating a three-port time-domain reflectometry system
12/18/2003US20030230936 Submarine cable power feeding system
12/17/2003EP1372270A1 Two-wire power transmitting/receiving device and its method
12/17/2003EP1371272A1 Wired transmission path
12/17/2003EP1371227A2 Dvd-asi signal inverting adapter and system
12/17/2003EP1371219A2 Data communication over a power line
12/17/2003EP1370923A2 Channel time calibration means
12/17/2003EP1370879A2 System and method for fault isolation for dsl loop extenders
12/17/2003CN2593472Y Digit transmission apparatus of telephone line
12/17/2003CN1131605C Communication system for ultra-low-frequency and ultra-narrow-band distribution network and correspondence communication method
12/17/2003CN1131604C Signal wave shape equalizing device
12/17/2003CN1131603C Wiring access method of broadband multimedia services
12/17/2003CN1131589C AC power source filter for audio video electrical load
12/16/2003US6665498 High-speed optical data links
12/16/2003US6665402 Method and apparatus for performing echo cancellation
12/16/2003US6665351 Circuit and method for providing a digital data signal with pre-distortion
12/16/2003US6665347 Output driver for high speed Ethernet transceiver
12/16/2003CA2308211C Composite trellis system and method
12/11/2003WO2003103246A1 Receiver with selection between a decision feedback equalizer and a linear equalizer
12/11/2003WO2003021930A9 Powerline bridge apparatus
12/11/2003WO2003019889A3 Data reconstruction in a receiver
12/11/2003US20030227966 Methods, devices and computer program products for adaptively adjusting passbands of high-pass filters of asymmetric digital subscriber link (ADSL) modems
12/11/2003US20030227374 Modular electrotactile system and method
12/11/2003US20030227373 Last leg utility grid high-speed data communication network having virtual local area network functionality
12/11/2003CA2487358A1 Receiver with selection between a decision feedback equalizer and a linear equalizer
12/10/2003EP1370030A2 Method of and apparatus for simultaneously providing tone and intermittent pulses onto a cable in order to identify the cable
12/10/2003EP1370029A2 Powerline based network
12/10/2003CN2591875Y Electric line carrier wave transmission device
12/10/2003CN1130894C Method for automatically adapting levels of signal exchanged in communication network
12/10/2003CN1130848C Digital control network system for mixed-mode transceiver and conflict-free communication method
12/10/2003CN1130847C Portable network card testing method and device
12/10/2003CN1130846C Waveform equalization apparatus
12/10/2003CN1130840C System and method for adaptive interference cancelling
12/10/2003CN1130827C Convergece detector and method of adaptive filter
12/09/2003US6661895 Zero-delay structure for sub-band echo cancellation
12/09/2003US6661857 Rapid estimation of wireless channel impulse response
12/09/2003US6661727 Dynamic register with low clock rate testing capability
12/09/2003US6661634 Digital subscriber line alternating current EMI/RFI broadband noise eliminator
12/09/2003US6661303 Cross talk suppression in a bidirectional bus
12/09/2003CA2241098C Method and apparatus for separating digital data signals from analog voice signals transported over a common conductor
12/09/2003CA2123002C Network echo canceller
12/04/2003WO2003101058A1 Time delay estimation for equalisation
12/04/2003WO2003101004A1 Echo canceller with double-talk detector
12/04/2003WO2003100996A2 Broadband communications using a medium-voltage power line
12/04/2003WO2003063382A8 Antenna device
12/04/2003WO2003059036A3 Reduced latency interleaver utilizing shortened first codeword
12/04/2003US20030224784 Communications system for providing broadband communications using a medium voltage cable of a power system
12/04/2003US20030224728 Bluetooth access point and remote bluetooth modules for powerline based networking
12/04/2003US20030223575 Line echo cancellation system
12/04/2003US20030223574 Distributed echo cancelling
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