Patents
Sitemap › H04 - Electric communication technique › H04L - Transmission of digital information, e.g. telegraphic communication › H04L 1 - Arrangements for detecting or preventing errors in the information received
Patents for H04L 1 - Arrangements for detecting or preventing errors in the information received (103,402)
08/1987
08/19/1987CN86103844A Antenna diversity reception system for eliminating interference
08/18/1987US4688234 Apparatus and method for producing a signal-to-noise ratio figure of merit for digitally encoded-data
08/18/1987US4688226 Code error overlaying in digital transmission signals
08/18/1987US4688207 Channel quality monitoring apparatus
08/18/1987CA1225743A1 Soft decision convolutional code transmission system
08/18/1987CA1225713A1 Digital data transmission system
08/18/1987CA1225712A1 Method of signal transmission with selected signal transmission rate
08/18/1987CA1225703A1 Squelch signal generator capable of generating a squelch signal with a high reliability
08/12/1987EP0128214B1 Packet error rate measurements by distributed controllers
08/11/1987US4686676 Apparatus and method for determining true data in a digital data stream from distorted data
08/11/1987US4686675 Channel switching system
07/1987
07/30/1987EP0152423A4 Maintenance response signalling arrangement for a digital transmission system.
07/29/1987EP0230066A1 A method for decoding data transmitted along a data channel, and an apparatus for executing the method
07/28/1987US4683578 Automatic gain control using the extreme points of a constellation
07/23/1987EP0151616A4 Control signalling arrangement for a digital transmission system.
07/22/1987EP0229353A2 Method and system for handling transmission errors
07/21/1987CA1224531A1 Method of measuring quality of a signal received by a receiver of a two-dimensional linear modulation data communication system
07/14/1987US4680772 Digital signal repeater including means for controlling a transmitter
07/14/1987US4680750 Universal high-speed span line switch
07/09/1987DE3633761A1 Datenueberwachungsgeraet Datenueberwachungsgeraet
07/09/1987DE3600164A1 Device for block-by-block transmission of binary signals
07/07/1987US4679227 Ensemble modem structure for imperfect transmission media
07/07/1987US4679193 Runt packet filter
07/07/1987CA1223985A1 Apparatus and method for checking time slot integrity of a switching system
07/07/1987CA1223934A1 Asynchronous transmission system particularly for interactive videotex system
07/02/1987WO1987004030A1 Procedure and device to determine data transmission rate and signal distortion of synchronous and asynchronous serial data transmission lines
07/01/1987EP0227458A2 Diversity receiver
07/01/1987CN86108049A Signal selection by majority comparison
06/1987
06/30/1987US4677627 Error correction scheme
06/30/1987US4677624 Self-synchronizing de-interleaver for viterbi decoder used in wireline modems
06/30/1987US4677619 Method and apparatus for supervising digital radio transmission line
06/30/1987US4677480 System for detecting a transmission error
06/30/1987CA1223649A1 Method for improving message reception from multiple sources
06/23/1987US4675863 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
06/23/1987US4675862 For use with a digital transmission line
06/23/1987US4675545 Wave shaping apparatus for eliminating pulse width distortion
06/23/1987CA1223372A1 Fault-tolerant atomic broadcast methods
06/23/1987CA1223368A1 Ternary data transmission system
06/18/1987WO1987003717A1 Signal selection by majority comparison
06/16/1987US4673976 Cable television system data verification apparatus
06/10/1987EP0224586A1 Digital communication equipment
06/09/1987US4672637 Adaptive bit synchronizer
06/09/1987US4672605 Data and voice communications system
06/04/1987WO1987003442A1 Method and apparatus for synchronizing encrypting and decrypting systems
06/03/1987EP0224149A2 Improved synchronous/asynchronous modem
06/02/1987US4670880 Method of error detection and correction by majority
05/1987
05/27/1987EP0223459A2 Runt packet filter
05/27/1987EP0223458A2 Deep trap machine
05/26/1987US4669091 Adaptive multipath distortion equalizer
05/14/1987DE3539494A1 Radio transmission arrangement for data signals
05/13/1987EP0221792A1 Method and apparatus for digital data transmission with intersymbol distortion reduction
05/05/1987US4663768 Diversity system of selection type equipped with a code correction/switch circuit for receiving a PSK or QAM wave carrying differentially encoded signal
05/05/1987US4663766 Method of determining automatically the rate of data signals in a modem
05/05/1987CA1221460A1 Apparatus for decoding error-correcting codes
04/1987
04/28/1987US4661954 Error protection of linearly coded digital signals
04/28/1987US4661857 Facsimile communication control method
04/23/1987WO1987002533A1 Asynchronous communication system
04/22/1987EP0218605A1 Signal quality steered diversity
04/21/1987US4660199 Majority logic circuit for digital error correction system
04/21/1987CA1220869A1 Decoding method and system for doubly-encoded reed- solomon codes
04/21/1987CA1220830A1 Transmitting sequence numbers of information in a packet data transmission system
04/16/1987DE3536505A1 Method for setting up a connectionless acknowledged messaging service in communications systems
04/15/1987EP0218161A2 Method of analysing and synthesizing binary characters
04/15/1987CN85107392A Channel switching system for use in a radio digital transmission system
04/14/1987US4658399 Circuit arrangement designed to pick up the error rate in numerical transmission systems
04/14/1987CA1220545A1 Signal quality steered antenna diversity system
04/08/1987EP0217570A2 Error-correcting modem
04/07/1987US4656645 Radio communication system
04/07/1987US4656643 Line interface circuit
04/01/1987EP0216353A2 Method and apparatus for backing up data transmission system
03/1987
03/31/1987US4654861 Method and device for measuring phase jitter on a transmission channel
03/31/1987US4654807 Method of measuring communication channel impairement in polling applications
03/31/1987US4654480 Method and apparatus for synchronizing encrypting and decrypting systems
03/25/1987EP0215276A1 Method and circuit arrangement for the transmission of data signals to a group of control devices within a loop system
03/25/1987EP0215166A2 Digital communication system
03/24/1987US4653070 Channel monitoring circuit for use in a repeater station over radio digital transmission
03/18/1987EP0214476A1 Method and circuit arrangement for the transmission of data signals between two control devices within a loop system
03/18/1987EP0214474A1 Method and circuit arrangement for the transmission of data signals between control devices interconnected by a loop system
03/18/1987EP0214333A1 Channel monitoring circuit for use in a repeater station of a radio digital transmission system
03/17/1987US4651329 Digital decode logic for converting successive binary zero pulses having opposite polarity to a stream of data pulses
03/17/1987US4651328 Arrangement for supervising a CMI-code converter
03/11/1987EP0214020A1 Data packets transmission method over a network or a transmission chain, and device for carrying out the method
03/11/1987EP0213682A2 Method of, and apparatus for data communication
03/11/1987CN85106879A Channel monitoring circuitry of a relay station in radio digital transmission line
03/10/1987CA1219042A1 Clock-frequency recovery device adapted to high- frequency radiocommunications in disturbed media
03/04/1987EP0212667A2 Communication system with variably repeated transmission of data blocks
03/04/1987EP0212030A1 Apparatus for detecting the end of the energy of a data signal
03/04/1987EP0211849A1 Pager system and communication protocol.
03/03/1987CA1218747A1 Data processing system in which unreliable words in the memory are replaced by an unreliability indicator
02/1987
02/24/1987US4646320 Automatic digital strapping apparatus for data modems
02/24/1987US4646301 Decoding method and system for doubly-encoded Reed-Solomon codes
02/24/1987US4646300 Communications method
02/24/1987CA1218436A1 Data transmitting and receiving apparatus
02/24/1987CA1218425A1 Carrier detection circuit
02/17/1987US4644546 Method of digital signal transmission
02/17/1987US4644542 Fault-tolerant atomic broadcast methods
02/10/1987US4642807 Fault tolerant receiver
02/04/1987EP0210213A1 Radio pager with error detection.
02/04/1987EP0210181A1 Dispatch trunked radio system.
02/04/1987CN86101654A Signal quality steered diversity
1 ... 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 ... 1035