Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 3 - Line transmission systems
Patents for H04B 3 - Line transmission systems (31,523)
04/2005
04/05/2005US6876725 Single ended line probing in DSL system
04/05/2005CA2338663C Local area network of serial intelligent cells
04/05/2005CA2268096C Distributed audio signal processing in a network experiencing transmission delay
03/2005
03/31/2005WO2005029908A2 Loudspeaker with single or dual channel input selector and lockout
03/31/2005WO2005029803A2 Multicarrier communication method, system and apparatus
03/31/2005WO2005029725A2 System for the analysis of the operation of a control network of an installation
03/31/2005WO2005029724A1 Device for controlling communication between a telecommunications network and subscriber equipment
03/31/2005WO2005029710A2 Communication protocol over power line communication network
03/31/2005WO2005010729A3 Powerline endpoint for data communication
03/31/2005WO2005002079A3 A method and system for bidirectional data and power transmission
03/31/2005WO2004082321A3 Multi-channel digital feedback reducer system
03/31/2005US20050070243 Multichannel echo canceller system using active audio matrix coefficients
03/31/2005US20050070228 Interference cancellation receiver for high-speed communication systems
03/31/2005US20050069321 Coupling circuit arrangement for data communication over power lines
03/31/2005US20050069064 Digital equalization process and mechanism
03/31/2005US20050069032 Analog equalizer
03/31/2005US20050069028 Method and apparatus for determining a topology of a subscriber line loop
03/31/2005US20050068985 Two-stage symbol alignment method for ADSL transmission in the presence of TCM-ISDN interferers
03/31/2005DE10050476B4 Vorrichtung zur Durchführung sowohl von Messungen als auch von Datenübertragung in elektrischen Energieverteilnetzen Apparatus for carrying out both measurements and data transmission in electric power distribution systems
03/30/2005EP1519517A2 Local area network of serial intelligent cells
03/30/2005EP1519495A2 Cable distance extender and method making use of same
03/30/2005EP1518394A1 Echo processing devices for single-channel or multichannel communication systems
03/30/2005EP1518393A1 Non stationary echo canceller
03/30/2005EP1518334A1 Method and apparatus for controlling echo cancellation
03/30/2005EP1430618B1 Method for operating a transmission system and transmission system in an energy supply network
03/30/2005EP1350329A4 Inductive coupling of a data signal to a power transmission cable
03/30/2005EP0947057B1 Double talk and echo path change detection in a telephony system
03/30/2005CN1602594A Frequency domain echo canceller
03/30/2005CN1602590A Power line communication circuit
03/30/2005CN1602583A Communication device with active equalization and method therefor
03/30/2005CN1601919A Receiver including linearity compensation in the receive band
03/30/2005CN1601917A Analog equalizer
03/30/2005CN1195354C Threephase five-line powder and information shared system
03/29/2005US6873179 Signal transmitting device suited to fast signal transmission
03/24/2005WO2004114541A3 Sparse echo canceller
03/24/2005WO2004093488A3 Directional speakers
03/24/2005WO2004070905A3 Shielded energy conditioner
03/24/2005WO2004002001A8 Ultra-wideband communication through a wire medium
03/24/2005US20050066368 Receiver including linearity compensation in the receive band
03/24/2005US20050063535 Modular power line network adapter
03/24/2005US20050063477 Transmitter/receiver for bidirectional communications
03/24/2005US20050063422 Communication protocol over power line communication networks
03/24/2005US20050063363 Communication protocol over power line communication networks
03/24/2005US20050063355 System and method for multi-link communication in home network
03/24/2005US20050063323 Method and circuit arrangement for determination of transmission parameters
03/24/2005US20050063298 Synchronization in a broadcast OFDM system using time division multiplexed pilots
03/24/2005US20050063108 Distance extender and method making use of same
03/24/2005US20050062589 Arrangement of inductive couplers for data communication
03/23/2005EP1516438A1 Device for the wideband electrical connection of two units which can be displaced in relation to each other
03/23/2005EP1516437A1 Communication system and method therefor
03/23/2005EP1516436A2 Ultra-wideband communication through a wire medium
03/23/2005EP1516194A2 Method and system for transmitting an information signal over a power cable
03/23/2005EP1125373B1 Method and apparatus for qualifying loops for data services
03/23/2005CN2687954Y High-resistance multiplexing box for E1 digital relay line monitoring
03/23/2005CN2687953Y Low-voltage distributing grid power line high-speed data communication capacitive broadband coupling device
03/23/2005CN2687952Y Relay of power line broadband accessing system for multi-speed mixing
03/23/2005CN1599995A Burst QAM downhole telemetry system
03/23/2005CN1599363A Channel equalizer, method and computer program for equalizing a channel
03/23/2005CN1599273A Synchronous device and method of power line carrier communication transceiver
03/23/2005CN1599272A Power-line carrier communication method
03/23/2005CN1599271A Non-broadband signal transmission method and device using power line as medium
03/22/2005US6871044 Exciter system and method for communications within an enclosed space
03/22/2005US6870901 Design and architecture of an impairment diagnosis system for use in communications systems
03/22/2005US6870899 ADSL loop qualification systems and methods
03/22/2005US6870880 Waveform equalization apparatus
03/22/2005US6870465 Interface controller for magnetic field based power transmission line communication
03/22/2005US6870282 Method for the transmission of signals in a bus system, superposed on a direct supply voltage
03/22/2005CA2345999C Method and apparatus for demodulating and equalizing an am compatible digital audio broadcast signal
03/17/2005WO2005025076A2 Tactile transducers and method of operating
03/17/2005WO2005025013A1 Modular outlet
03/17/2005WO2005013476A3 Radio frequency communication between devices via a power plane on a circuit board
03/17/2005WO2004066539A3 Light fixture wireless access points
03/17/2005US20050060136 Modeling and calibrating a three-port time-domain reflectometry system
03/17/2005US20050058309 Loudspeaker with single or dual channel input selector and lockout
03/17/2005US20050057320 Multi-function integrated automation cable system and method
03/17/2005CA2536377A1 Modular outlet
03/16/2005EP1515147A1 Method and apparatus for determining the group delay caused by a device under test
03/16/2005EP1514390A1 Receiver with selection between a decision feedback equalizer and a linear equalizer
03/16/2005EP1514369A1 Receiver signal strength indication
03/16/2005EP1514364A1 Digital echo canceller
03/16/2005EP1514363A1 Method, apparatus, and system for reducing memory requirements for echo cancellers
03/16/2005CN2686214Y Transmission line capable of canceling and preventing crosstalk
03/16/2005CN1595827A Digital adaptive filter and acoustic echo canceller using the same
03/16/2005CN1193558C Method and apparaus of providing adaptive equalization using sign permutation filtering
03/16/2005CN1193556C 信号传输装置 Signal transmitting means
03/16/2005CN1193507C Improved ADSL compatible discrete multiple audio frequency device
03/15/2005US6868552 Ingress noise control system and ingress noise blocking device
03/15/2005US6868295 Intelligent home control bus
03/15/2005US6868157 Echo canceling method, echo canceller and voice switch
03/15/2005US6868116 Universal telephony tones detector
03/15/2005US6867908 Optical amplifier having various control circuitry
03/15/2005US6867689 Power line communication modern not requiring extra plug socket
03/15/2005US6867659 Method and apparatus for filtering a clock signal
03/10/2005WO2005022930A1 Apparatus and method for monitoring transmission systems using embedded test signals
03/10/2005WO2005022797A2 Synchronization in a broadcast ofdm system using time division multiplexed pilots
03/10/2005WO2005022595A2 A parametric transducer
03/10/2005WO2004084006A3 Network bandwidth management
03/10/2005US20050055388 Blind signal separation system and method, blind signal separation program and recording medium thereof
03/10/2005US20050054301 Apparatus and method for monitoring transmission systems using embedded test signals
03/10/2005US20050053243 System and method for identifying a headset type in an electrical device
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