Patents
Patents for H04L 1 - Arrangements for detecting or preventing errors in the information received (103,402)
06/1993
06/08/1993CA2013158C Error correction method and apparatus
06/03/1993DE4138937A1 Data transmitter testing device - provides simulated interface with physical and logical parameters for several different transmission characteristics
06/02/1993EP0544463A2 Coded modulation, with unequal error protection, for fading channels
06/02/1993EP0544315A2 Maximum likelihood sequence estimation apparatus
06/02/1993EP0543907A1 Method of recovering lost bits in digital transmission.
06/01/1993US5216697 Signal quality detector circuit
06/01/1993US5216675 Reliable broadcast protocol
06/01/1993US5216674 Method of and device for bringing a network interface out of a sleep mode into a wake-up state
06/01/1993CA2006829C Self-adaptive equalizer circuit for a differentially coherent demodulation installation
05/1993
05/28/1993CA2073560A1 Multi-media serial line switching adapter for parallel networks and heterogenous and homologous computer systems
05/26/1993EP0543554A1 Viterbi decoding apparatus
05/26/1993EP0543549A2 Data decoding device
05/26/1993EP0543139A1 Jitter analyzer
05/25/1993US5214687 Method to determine transmission quality
05/25/1993US5214675 System and method for calculating channel gain and noise variance of a communication channel
05/25/1993US5214656 Multiplexed coded modulation with unequal error protection
05/25/1993US5214637 High speed two wire modem
05/25/1993US5214391 Demodulation apparatus having multipath detector for selecting a first or second demodulator
05/18/1993US5212724 Processor-to-processor communications protocol for a public service trunking system
05/18/1993US5212714 High speed data interface for land mobile communication system
05/18/1993US5212713 Fault location arrangement for digital transmission systems
05/18/1993US5212689 Method of transmitting different commands relating to the choice of transmitter antenna in a time multiplex radio communications system
05/18/1993US5212475 Method for generating an alarm inhibit signal
05/13/1993WO1993009619A1 Peak to average power ratio reduction methodology for qam communications systems
05/13/1993WO1993009618A1 Communication system utilizing self-similar signals
05/12/1993EP0541161A2 Transmission system for correcting individual or bundle errors of a cyclic coded digital signal
05/12/1993EP0540764A1 Demodulator unit arranged to check for system failures during operation
05/12/1993CN1072048A Communication signal having time domain pilot component
05/11/1993US5210760 Optimized pointer control system
05/11/1993US5210754 Pattern synchronizing circuit
05/11/1993US5210751 Signal transmission system capable of performing re-transmission control in units of slots
05/07/1993CA2055012A1 Free space local area network system
05/05/1993EP0540232A2 Coded modulation with unequal error protection
05/05/1993EP0540177A2 Information transmission method and apparatus
05/05/1993EP0540007A2 Method and apparatus for transmitting data blocks with parity and synchronizing blocks
05/05/1993EP0539473A1 Error protection for vlc coded data
05/04/1993US5208666 Error detection for digital television equipment
04/1993
04/29/1993WO1993009622A1 Communication signal having a time domain pilot component
04/28/1993EP0539200A2 Error detection for digital television equipment
04/28/1993EP0538466A1 A system for echo cancellation comprising a ghost cancellation reference signal
04/28/1993EP0532503A4 Cable television radio frequency subscriber data transmission apparatus and calibration method
04/27/1993US5206863 Processor-to-processor communications protocol for a public service trunking system
04/27/1993CA1317040C Repeater for regenerating frame-multiplexed signal
04/27/1993CA1316984C Error correction method for multicarrier radio transmission system
04/26/1993CA2079501A1 Error detection for digital television equipment
04/22/1993DE4230521A1 Viterbi decoder with computer for input data branching - operates by majority logic on content of max. likelihood path obtd. from add-compare-select calculator.
04/22/1993DE4229654A1 Audio and video signal transmission with error correction - protects data groups with bit quantity fluctuating between frames by sorting data bits w.r.t. their importance and distributing bit groups homogeneously within frame
04/21/1993CN1020364C Data and forward error control coding techniques for digital signals
04/20/1993US5204981 Interference elimination system
04/20/1993US5204876 Method and apparatus for providing high data rate traffic channels in a spread spectrum communication system
04/15/1993WO1993007691A1 A radio frequency local area network
04/15/1993CA2120520A1 A radio frequency local area network
04/14/1993EP0536334A1 System and method for generating signal waveforms in a cdma cellular telephone system
04/14/1993CN1071036A Variable rate vocoder
04/13/1993US5203026 Method of selecting the most suitable receiver antenna from two or more receiver antennas
04/13/1993US5203024 Antenna selection diversity reception system
04/13/1993US5203018 Space diversity system switching transmission
04/13/1993US5202903 Noise-immune space diversity receiver
04/13/1993US5202817 Hand-held data capture system with interchangeable modules
04/13/1993CA1316276C Multiplex transmission system
04/07/1993EP0535812A2 TDMA burst-mode mobile radio communication system with forward error correction
04/07/1993EP0535435A2 A circuit and method for receiving and transmitting control and status information
04/07/1993EP0535396A1 Method for the reduction of bit errors in a digital communication system
04/07/1993CN1070780A Extended error correction of transmitted data message
04/06/1993US5201071 Method and apparatus for reducing the peak envelope voltage of an RF transmitter while maintaining signal average power
04/06/1993US5200962 Data compression with error correction
04/06/1993US5200957 Mobile assisted handoff
04/06/1993US5200949 Link changeover control system for local area network of broadcasting arrangement
04/01/1993WO1993006665A1 Isdn 's' signal detection and display apparatus
04/01/1993WO1993006550A1 Viterbi decoder bit efficient chainback memory method and decoder incorporating same
03/1993
03/30/1993US5199061 Communication method and equipment for freeze-frame video phone
03/30/1993US5199047 Receiver for a digital transmission system
03/30/1993CA1315340C Control of optical systems
03/25/1993DE4231163A1 Fehlertolerantes mehrstations-uebertragungssystem A fault-tolerant more stations-transmission system
03/24/1993EP0532717A1 Multimedia high speed network
03/24/1993EP0532504A1 Cable television radio frequency data processor.
03/24/1993EP0532503A1 Cable television radio frequency subscriber data transmission apparatus and calibration method.
03/23/1993US5197083 Multimedia protocol interface for 64 kbit/s data flow
03/23/1993US5197061 Device for the transmission of digital data with at least two levels of protection and corresponding reception device
03/21/1993WO1993006671A1 Extended error correction of a transmitted data message
03/20/1993CA2078646A1 Fault tolerant multi-drop communications system
03/17/1993EP0532130A2 Data communication apparatus
03/17/1993EP0334867B1 Duplex data transmission
03/16/1993US5195098 Binary data error correction using hint signal
03/16/1993US5195093 Method and apparatus for ensuring CRC error generation by a data communication station experiencing transmitter exceptions
03/11/1993CA2076061A1 Method of forming a channel estimate for a time-varying radio channel
03/10/1993EP0530633A2 Intelligent interconnects for broadband optical networking
03/10/1993EP0530339A1 Method for identifying a supervising signal at a base station of a mobile telephone system.
03/09/1993US5193093 Data transfer process with loop checking
03/08/1993CA2076290A1 Radio receiver and transmitter providing diversity
03/03/1993EP0529909A2 Error correction encoding/decoding method and apparatus therefor
03/03/1993EP0529718A1 Digital signal transmission system using concatenated codes and receiver and decoder used for this system
03/03/1993EP0529602A2 Differential receiver which is tolerant of line faults
03/03/1993EP0529316A1 Room temperature control device
03/03/1993EP0529051A1 Method and apparatus for providing high data rate traffic channels in a spread spectrum communication system
03/02/1993US5191598 System for reducing the affects of signal fading on received signals
03/02/1993US5191585 Computer networking method
03/02/1993US5191583 Method and apparatus for effecting efficient transmission of data
03/02/1993US5191576 Method for broadcasting of digital data, notably for radio broadcasting at high throughput rate towards mobile receivers, with time frequency interlacing and analog synchronization
02/1993
02/24/1993EP0528370A2 Frame length control in data transmission using ATM network