Patents
Patents for H04L 1 - Arrangements for detecting or preventing errors in the information received (103,402)
08/1992
08/11/1992US5138620 Communication control system
08/11/1992US5138616 Continuous on-line link error rate detector utilizing the frame bit error rate
08/06/1992WO1992013429A1 Method of controlling a switching device
08/05/1992WO1992014343A1 Modulator/demodulator for compatible high definition television system
08/05/1992EP0497452A2 Data transmission system between base and relay stations for diagnosis packets
08/05/1992EP0497250A1 Method for detecting an interfering signal for a digital data demodulator and apparatus for the implementation of such a method
08/05/1992EP0496986A2 Packet data communication system
08/05/1992CA2101644A1 Modulator/demodulator for compatible high definition television system
08/04/1992US5136592 Error detection and correction system for long burst errors
08/04/1992US5136591 Measuring method and device for fault analysis of digital transmission paths
08/04/1992US5136576 Transmission system
08/04/1992CA1306016C Display radio pager having graphic alarm for selective indication of memory availability factors
07/1992
07/29/1992EP0496467A2 Receiver for digital transmission system controlled by the measured quality factor of the signal and with improved power consumption
07/28/1992US5134612 Digital communication terminal equipment
07/28/1992CA1305758C Phase difference adjusting circuit
07/23/1992WO1992012483A1 Data reception technique
07/22/1992EP0495642A2 Error detection circuit and method
07/22/1992EP0495036A1 Dynamic encoding rate control minimizes traffic congestion in a packet network
07/22/1992EP0314724B1 Control of optical systems
07/21/1992US5132975 Very high speed error detection network
07/17/1992CA2058684A1 Error detection structure and method using partial polynomial check
07/15/1992EP0494298A1 Multi-level radio-frequency communication system.
07/14/1992US5131012 Synchronization for cylic redundancy check based, broadband communications network
07/14/1992US5131011 Receiver for data transmission system with nonlinearities
07/14/1992US5131010 Voice guard digital voter for multiple site PST RF trunking system
07/14/1992US5130993 Transmitting encoded data on unreliable networks
07/14/1992CA1305228C Method and device for transmetting the signals of a digital service channel over the parity channel of a digital stream transmitted with a parity control code
07/08/1992EP0494114A2 Electronic identification system
07/08/1992EP0494037A2 Early frame release in modified HDLC protocol
07/08/1992EP0494036A2 Data frames transmission with erroneous frames retransmission in HDLC protocol
07/08/1992EP0494035A2 Data packet format in HDLC protocol with retransmission of frames having an error
07/08/1992EP0494003A1 Receiver for processing signals which are received over diversity paths
07/07/1992US5128969 Method and apparatus for diversity reception
07/07/1992US5128962 Line interface circuit and a method of testing such a circuit
07/07/1992US5128942 Method of and apparatus for transmitting video data
07/07/1992US5128930 Processor-to-processor communications protocol for a public service trunking system
07/07/1992US5128776 Prioritized image transmission system and method
07/01/1992EP0492851A2 Microcellular communications system using space diversity reception
07/01/1992EP0492812A2 Error detection and framing in packets transmitted in a sequence of fixed-length cells
07/01/1992EP0492703A1 Error prevention system for multichannel data transmission
07/01/1992EP0491868A1 Error detection for fiber distributed interfaced optic link.
07/01/1992CN1017296B Ensemble modem structure for imperfect transmission media
06/1992
06/30/1992US5127025 Space diversity tdma receiver
06/25/1992WO1992010893A1 Method of error recovery in a data communication system
06/25/1992WO1991007038A3 Method and apparatus for effecting efficient transmission of data
06/24/1992EP0491421A2 Coherent optical multichannel receiver
06/24/1992EP0491397A2 Data integrity guarantee system
06/23/1992US5125102 Trunked radio repeater system including synchronization of a control channel and working channels
06/23/1992US5124991 Error correction for infrared data communication
06/23/1992EP0667019A4 Hand-held data capture system with interchangeable modules.
06/23/1992CA1304132C Fail-soft architecture for public trunking system
06/17/1992EP0490552A2 Multiplexed coded modulation with unequal error protection
06/17/1992EP0490427A2 Receiver with at least two receive branches
06/17/1992EP0489880A1 Maximal ratio diversity combining technique.
06/17/1992DE4038596A1 Data transmission error detection system - uses parity checking word combined with parallel data words at transmission and reception ends for comparison
06/16/1992US5123020 Phase synchronization pull-in system in bit error detecting apparatus
06/16/1992US5123019 Method for processing binary code words
06/16/1992CA1303678C Data transmission systems with automatic repeat request
06/13/1992WO1992010888A1 Process for transmitting additional information with an a.m. radio signal
06/11/1992CA2055172A1 Error detection and framing in packets transmitted in a sequence of fixed-length cells
06/09/1992US5121410 Method for the transmission of data or commands and device for carrying out said method
06/09/1992US5121397 Method and apparatus for producing order independent signatures for error detection
06/09/1992US5121396 Preservation of crc integrity upon intentional data alteration during message transmission
06/09/1992US5121395 Transmission error protection for TDMA digital channels
06/09/1992US5121391 Subscriber RF telephone system for providing multiple speech and/or data singals simultaneously over either a single or a plurality of RF channels
06/09/1992US5121211 System for echo cancellation comprising an improved ghost cancellation reference signal
06/08/1992WO1992010890A1 Cdma microcellular telephone system and distributed antenna system therefor
06/03/1992EP0488610A2 Communication line backup system
06/03/1992EP0488050A2 Data sensing system
06/03/1992EP0446276A4 Adaptive rate control for echo cancelling modem
06/02/1992US5119401 Decision feedback equalizer including forward part whose signal reference point is shiftable depending on channel response
06/02/1992US5119400 Digital transmission system employing a viterbi-like equalizer
06/02/1992US5119380 Zero string error detection circuit
06/02/1992US5119375 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
06/02/1992US5119210 Facsimile machine having error correction mode
05/1992
05/27/1992EP0486729A1 Coded modulation for mobile radio
05/27/1992EP0486667A1 Communication signal having a time domain pilot component
05/26/1992US5117502 Mobile radio communication system
05/26/1992CA1301966C Watch pager system and communication protocol
05/22/1992WO1992009953A1 Error detection system
05/20/1992EP0486232A2 ADPCM decoder with error detection
05/20/1992EP0486094A1 Receiving device having a plurality of receiving branches
05/20/1992EP0485921A1 Device for the processing of the Viterbi algorithm comprising a processor and a specialized unit
05/20/1992CN1061312A System and method for generating signal waveforms in cdma cellular telephone system
05/20/1992CN1061311A Diversity receiver in cdma cellular telephone system
05/19/1992US5115452 Phase jitter correction arrangement
05/19/1992US5115436 Forward error correction code system
05/19/1992US5115429 Dynamic encoding rate control minimizes traffic congestion in a packet network
05/19/1992CA1301379C Multiple accessing satellite communication system having standby central station
05/19/1992CA1301309C Protocol for handling transmission errors over asynchronous communication lines
05/19/1992CA1301274C Digital communication apparatus
05/14/1992WO1992008296A1 Method of detecting errors in the transmission of frequency-coded digital signals
05/13/1992EP0485108A2 Coded modulation with unequal levels of error protection
05/13/1992EP0485025A1 Data transmission system with a plurality of satellite circuits on a data line
05/12/1992US5113400 Error detection system
05/12/1992CA1300712C Signal selection by majority comparison
05/06/1992EP0483788A2 A synchronous terminal station system
05/06/1992EP0394357A4 Acknowledge back pager with apparatus for controlling transmit frequency
05/06/1992CN1016556B Ensemble modem structure for imperfect transmission media
05/05/1992US5111461 Communication control system