Patents for H04L 25 - Baseband systems (55,083)
11/1992
11/10/1992US5162791 Collision detection using code rule violations of the manchester code
11/05/1992DE4109822C1 Data transmission equipment sending plesiochroic useful signals by pulse stuffing - includes substitution signal generator delivering equal values for all bits except frame identification word
11/04/1992EP0511915A1 Method and apparatus for increasing the transmission rates of signals in multi-function borehole cables
11/04/1992EP0511744A2 Multiplex transmission between nodes with acquisition signals and CRC calculation
11/04/1992EP0511708A2 Method and apparatus for communication channel identification and signal restoration
11/04/1992EP0511698A1 Semi-recursive adaptive equalizer
11/04/1992EP0511373A1 Dc-free line code and bit and frame synchronization for arbitrary data transmission
11/03/1992US5161151 System and method for controlling multiplex communications between master station and slave stations
11/03/1992US5160929 System for parallel communication of binary data via trinary transmission lines
11/03/1992CA1309779C Node for a backplane bus
10/1992
10/31/1992CA2065554A1 Opto-electronic interface for decoding wave division multiplexed manchester gray coded binary signal
10/29/1992WO1992019061A1 Superframes
10/29/1992WO1992019055A1 Data bit to constellation symbol mapper
10/28/1992EP0510976A2 Level independent automatic cable equalizer
10/28/1992EP0510756A2 Sample tuning recovery for receivers using Viterbi processing
10/28/1992EP0510364A2 Repeater station wherein input frame data are accessible
10/28/1992EP0454727A4 Active signalling transmitter control
10/28/1992CN1065762A Apparatus and method of dc offset correction for receiver
10/27/1992US5159610 Trellis precoding for modulation systems
10/27/1992US5159609 Data receiving device with delayed equalization and retroactive time-pulse recovery
10/27/1992US5159565 Method for the determination of fir filter coefficients in equalizers
10/27/1992US5159282 Demodulation apparatus incorporating adaptive equalizer for digital communication
10/27/1992CA2063350A1 Level independent automatic cable equalizer
10/22/1992DE4111301A1 Serial data transmission by supply volage pulse modulation - enables terminal to receive and transmit simultaneously by interruption of current on line via exchange receiver
10/21/1992EP0509680A2 Common mode filtered magnetic connector
10/20/1992US5157690 Adaptive convergent decision feedback equalizer
10/20/1992US5157655 Apparatus for generating a ds-3 signal from the data component of an sts-1 payload signal
10/20/1992US5157651 Apparatus and method for determining line rates
10/20/1992CA1309196C Vehicle multiplex system
10/15/1992WO1992017970A1 Channel codec apparatus and method utilizing flat codes
10/15/1992WO1992017968A1 Data communication network providing power and message information
10/14/1992EP0508885A2 A synchronous decoder for self-clocking signals
10/14/1992EP0508655A2 Equalized eye pattern instrument
10/14/1992EP0508459A2 Digital transmission test system
10/14/1992EP0508407A2 Maximum likelihood sequence estimation for rapidly varying mobile radio communication channels
10/14/1992CN1065367A Clock rate matching in independent networks
10/13/1992US5155745 Synchronizer for asynchronous computer command data
10/13/1992US5155742 Time dispersion equalizer receiver with a time-reversal structure for TDMA portable radio systems
10/13/1992US5155637 Data transmission and detection system
10/13/1992US5155486 Asynchronous serial data receiver with capability for sampling the mid-point of data bits
10/13/1992CA1308811C Method and apparatus for implementing a prml code
10/09/1992WO1992017967A1 Multi-level symbol synchronizer
10/08/1992DE4136205C1 Signal processing circuit for cordless telephone - reduces signal harmonics in data transmission using Manchester decoder to extract information from received triangular signal
10/07/1992EP0507684A1 Communication system, especially for air traffic control
10/07/1992EP0507579A2 Multiplexed transmission between nodes with cyclic redundancy check calculation
10/07/1992EP0507444A2 Data transmission apparatus with error computer and maximal likelihood calculator
10/06/1992US5153466 All monolithic transceiver operative from a low voltage vcc dc supply
10/04/1992CA2064946A1 Communication system applicable namely to air traffic control
10/01/1992WO1992017029A1 Circuit for slicing data
10/01/1992WO1992017017A1 Transmitter end stage
10/01/1992WO1992017016A1 Reception comparator
10/01/1992DE4110533A1 Information transmission via two binary transmission channels - using simultaneous transmission of data signal and inverted data signal and combining by logical disjunction
09/1992
09/30/1992WO1992017966A1 Clamping receiver and transmission protocol
09/30/1992EP0506237A2 A communication apparatus with fault tolerance
09/30/1992EP0505657A1 Preamble recognition and synchronization detection in partial-response systems
09/30/1992CA2104694A1 Clamping receiver and transmission protocol
09/29/1992US5151924 Automatic equalization method and apparatus
09/29/1992US5151698 Method for the coding of a digital signal, coder and decoder to implement this method, regeneration method and corresponding regenerator utilizing pulse position modulation
09/29/1992US5151612 Circuit for eliminating digital noise or short pulses utilizing set/reset shift register
09/28/1992WO1992017938A2 Differential driver/receiver circuit
09/28/1992CA2108040A1 Differential driver/receiver circuit
09/28/1992CA2059922A1 Preamble recognition and synchronization detection in partial-response systems
09/27/1992WO1992017965A1 ALL MONOLITHIC TRANSCEIVER OPERATIVE FROM A LOW VOLTAGE Vcc DC SUPPLY
09/27/1992CA2076859A1 All monolithic transceiver operative from a low voltage vcc dc supply
09/24/1992DE4108573A1 Conductor regenerator for digital transmission system on metal cable - has cable connecting blocks permitting electro-optical and opto-electrical signal conversion with transition between corresp. transmission systems
09/23/1992EP0505283A2 Device for the galvanic insulation of DC electrical signals or signals containing a DC component
09/23/1992EP0505281A1 Synchronisation of terminal stations in a multirate half duplex tree network
09/23/1992EP0504890A2 Demodulator for demodulating a pi/4-shift DQPSK signal
09/23/1992EP0504546A2 Method of establishing initial phase synchronisation and adaption of the receive filter of a digital receiver in a baseband transmission system
09/23/1992EP0504306A1 Waveshaping transversal filter and method utilizing the same for data transmission over coaxial cable
09/22/1992US5150380 Receiver capable of removing both intersymbol interference and frequency offset
09/22/1992US5150379 Signal processing system for adaptive equalization
09/22/1992US5150359 Multiplexed synchronous/asynchronous data bus
09/17/1992WO1992016062A1 Data bus interface apparatus
09/17/1992DE4108709A1 Empfangskomparator Receiving comparator
09/17/1992DE4108610A1 Senderendstufe Transmitter output stage
09/16/1992EP0504062A1 Integrated circuit with servo-controlled impedances and application to transceivers, particularly for communication between units of an information system
09/16/1992EP0504060A1 Method and circuit for transmission detection in bidirectional differential links
09/15/1992US5148449 Centering multi-level data
09/15/1992US5148144 Data communication network providing power and message information
09/15/1992CA1307598C Method and apparatus for stabilized data transmission
09/09/1992EP0502739A2 NRZ clock and data recovery system employing phase lock loop
09/09/1992EP0502251A2 Method for intermediate amplification of digital signals and repeater for digital signals
09/09/1992EP0189456B1 Multipurpose digital ic for communication and control network
09/08/1992US5146476 High gain amplifier for reception of low level pulse code modulation nonreturn-to-zero signals
09/08/1992US5146475 Maximum-liklihood sequence estimation apparatus
09/08/1992US5146473 Subscriber unit for wireless digital subscriber communication system
09/08/1992CA2061909A1 Nrz clock and data recovery system employing phase lock loop
09/03/1992DE4205352A1 LF noise reduction filter for digital pulse train - extracts low frequency noise signal using low-pass filter and subtracts it from original input to regenerate pulse train
09/02/1992EP0501907A2 Methods and apparatus particularly useful for blind deconvolution
09/02/1992EP0501449A2 Automatic equalizer
09/02/1992EP0500804A1 Self-synchronizing infra-red communication system
09/01/1992US5144644 Soft trellis decoding
09/01/1992US5144469 Method for the transmission of data between two stations by means of optical waveguides
09/01/1992US5144305 Transmission arrangement comprising a block code encoded main channel and an auxiliary channel
09/01/1992US5144304 Data and forward error control coding techniques for digital signals
08/1992
08/26/1992EP0500263A2 Method for synchronising a receiver's data clock
08/26/1992EP0500041A2 Decision-feedback equalizer capable of producing an equalized signal at a high speed
08/25/1992US5142554 Data separator with noise-tolerant adaptive threshold
08/25/1992US5142552 Method and apparatus for analog D.C. offset cancellation