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)
08/1988
08/30/1988CA1241448A1 Method of, and a circuit for, estimating true data from distorted digital data signals
08/30/1988CA1241378A1 Multi-speed, full duplex modem
08/24/1988EP0279627A2 Communication apparatus
08/24/1988EP0279491A2 Monitoring circuit for a binary signal
08/24/1988EP0279080A2 Radio data transmission system
08/23/1988US4766599 Communication system with variably repeated transmission of data blocks
08/23/1988US4766596 Method and circuit arrangement for the transmission of data signals between control devices connected to one another via a loop system
08/23/1988CA1241123A1 Received signal processing apparatus
08/17/1988EP0278538A1 Monitor device
08/17/1988EP0277952A1 Procedure and device to determine data transmission rate and signal distortion of synchronous and asynchronous serial data transmission lines
08/16/1988US4764928 Method and apparatus in radio reception for avoiding storing a message more than once
08/16/1988US4764730 Radio receiver demodulation system
08/16/1988CA1240797A1 Data detector using probabilistic information in received signals
08/11/1988DE3702527A1 Data transmission device with repetition of data telegrams to be transmitted
08/10/1988EP0277471A1 Method for the detection and correction of transmission errors
08/09/1988US4763103 Process and method for wide band transmission, particularly for data transmission over an electricity distribution network
08/09/1988CA1240421A1 Digital telecommunications system
08/09/1988CA1240367A1 Apparatus and method for producing a signal-to-noise ratio figure of merit for digitally encoded-data
08/02/1988US4761784 Modem and method using multidimensional coded modulation
08/02/1988CA1240013A1 Control signalling arrangement for a digital transmission system
08/02/1988CA1239995A1 Digital signal repeater including means for controlling a transmitter
07/1988
07/28/1988WO1988005621A1 Transmission system
07/28/1988WO1988005571A1 Modem and method using multidimensional coded modulation
07/27/1988EP0275751A1 Method and apparatus for the digital transmission of voice signals by way of a radio channel
07/27/1988CN88200009U Fault protector for telex
07/26/1988US4760576 Error correction method
07/20/1988EP0275129A2 Information transmission system
07/20/1988EP0274709A2 Packet switch network protocol
07/19/1988US4759036 Decision-directed control circuit
07/19/1988US4759022 Method and receiver for receiving messages sent by radio
07/12/1988US4757518 Coding digital data
07/12/1988US4757452 Jitter measurement method and apparatus
07/06/1988EP0273249A2 Fault tolerant switch with selectable operating modes
07/05/1988US4756007 Adaptive communication rate modem
07/05/1988US4756005 Digital signal regenerator arranged for fault location
07/05/1988US4755993 Transmission system using forward error correction
06/1988
06/28/1988US4754482 Method and apparatus for synchronizing encrypting and decrypting systems
06/28/1988US4754467 Digital signal detection with signal buffering and message insertion
06/28/1988US4754420 Digital data filter for local area network
06/28/1988CA1238724A1 Channel switching system
06/22/1988EP0272162A1 Multiplexing device and demultiplexing device on an optical fibre
06/22/1988EP0271866A2 Subrate multimedia data transmission control system
06/21/1988US4752968 Antenna diversity reception system for eliminating reception interferences
06/21/1988US4752926 Orderwire detector for communication systems
06/21/1988CA1238369A1 Diversity system of selection type equipped with a code correction/switch circuit for receiving a psk or qam wave carrying differentially encoded signal
06/16/1988WO1988004498A1 Duplex data transmission
06/16/1988WO1988004497A1 Hf data communications system with network management
06/16/1988WO1988004496A1 Data transmission system with automatic repeat request
06/15/1988EP0271149A2 Troposcatter modem receiver
06/14/1988US4751510 Method and system for controlling a network of modems
06/07/1988US4750176 Single-channel communication bus system and station for use in such system
06/07/1988US4750165 Method of duplex data transmission using a send-and-wait protocol
06/07/1988CA1237816A1 Detector of predetermined patterns of manchester encoded data
06/01/1988EP0269120A2 TDMA communication system having common time slots for system maintenance
06/01/1988DE3639851A1 Method and circuit arrangement for monitoring a digital transmission system
05/1988
05/31/1988US4748637 Digital subscriber loop termination device
05/31/1988CA1237545A1 Data and voice communications system
05/31/1988CA1237502A1 Communications system with protection switching and channel identities
05/24/1988US4747106 Parity checker circuit
05/24/1988US4747104 Data transmission system employing a combination of block encoding and convolution encoding for error protection
05/17/1988US4745621 Method of and apparatus for detecting minimum bit number of received data
05/17/1988US4745603 Code sequence generator for a digital transmission line fault location system
05/17/1988US4745601 Digital service unit with secondary channel diagnostics
05/11/1988EP0266409A1 Apparatus useful in channel equalization adjustment
05/10/1988US4744095 Diversity channel data receiver with automatic alignment over a ±3.5-bit range
05/10/1988US4744092 Transparent error detection in half duplex modems
05/10/1988US4744086 Process for the transmission in blocks of digital information words with error correction capability
05/10/1988CA1236541A2 Communications method
05/04/1988CN85107392B Channel switching system for use in a radio digital transmission system
05/03/1988US4742533 Soft decision digital communication apparatus
05/03/1988US4742518 Fault location system for a digital transmission line
05/03/1988CA1236165A1 Dispatch trunked radio system
04/1988
04/27/1988EP0265080A1 Device for detecting bit phase difference
04/27/1988EP0264879A2 A fault detection signal transmission system
04/26/1988US4740957 Asynchronous addressable electronic key telephone system
04/20/1988EP0264205A2 Radio paging system with different transmission speeds and receiver therefor
04/20/1988EP0264064A2 Word synchronizer
04/20/1988EP0263973A2 Device and method for serial data exchange between more than two subscribers
04/13/1988EP0263421A2 Multipoint data communication with a supervisory system for detecting a malfunctioning remote station
04/13/1988EP0263175A1 Apparatus and method for encoding and decoding attribute data into error checking symbols of main data
04/12/1988US4737949 Transmission system for digital repeater supervisory code transmission
04/12/1988CA1235189A1 Error correction encoding system
04/07/1988WO1988002585A1 Trellis codes with spectral nulls
04/06/1988CN85106879B Channel monitoring circuitry of a relay station in radio digital transmission line
04/05/1988US4736402 Signaling arrangement
04/05/1988US4736388 Automatic fall back and restore system for data communication
04/05/1988US4736377 Method for determining reliability of high speed digital transmission by use of a synchronized low speed side channel
03/1988
03/30/1988EP0261601A2 Channel-system switching system for digital data radio-communication system
03/30/1988EP0261417A2 Display radio pager having graphic alarm for selective indication of memory availability factors
03/29/1988US4734920 High speed modem for multiple communication circuits
03/29/1988US4734676 Method and device for detecting a particular bit pattern in a serial train of bits
03/24/1988WO1988002201A1 Digital audio companding and error conditioning
03/23/1988EP0260603A2 Channel switching system
03/23/1988EP0260470A2 High speed modem
03/22/1988US4733395 Digital word generator
03/15/1988US4731816 Ensemble modem structure for imperfect transmission media
03/15/1988US4731801 Method for the reception and detection of digital signals
03/08/1988US4730313 Access circuit diagnostics for integrated services digital network
03/02/1988CN87202675U Device controlling to receive data transmission
03/01/1988CA1233525A1 Method for improving the reliability of data transmission over rayleigh fading channels
1 ... 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 ... 1035