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)
12/1991
12/26/1991WO1991020142A1 Maximal ratio diversity combining technique
12/24/1991CA1293534C Decision-directed control circuit
12/18/1991EP0287586B1 Data transmission system and method for use therein
12/17/1991US5073940 Method for protecting multi-pulse coders from fading and random pattern bit errors
12/17/1991US5073932 Secured data transmission and error recovery mechanism in cordless telephones
12/17/1991US5073900 Integrated cellular communications system
12/13/1991WO1991020137A1 Communication signal having a time domain pilot component
12/11/1991EP0461103A2 Method to reduce adjacent channel interference by baseband coding
12/11/1991EP0460748A1 Receiver with at least two receiving branches
12/11/1991EP0460604A2 Pattern sychronizing circuit
12/09/1991WO1992001346A2 Multimedia high speed network
12/09/1991CA2083147A1 Multimedia high speed network
12/07/1991CA2043803A1 Pattern synchronizing circuit
12/04/1991EP0459823A2 Diversity receiver using matched filter and decision feedback equalizer
12/04/1991EP0459524A2 Error control coding arrangement for communication using convolutionally encoded QAM or PSK
12/04/1991EP0458803A1 Process for operating a multicomputer system characterized by reliable signal quality.
12/04/1991EP0458802A1 Process for operating a fail safe multicomputer system.
12/04/1991CN1056787A Cable television radio frequency subscriber data transmission apparatus and calibration method
12/03/1991US5070503 Digital information transmitting and receiving system
12/03/1991CA1292781C Paging terminal apparatus with message storage and retransmission capability and method therefor
12/02/1991CA2043678A1 Method for processing signals for signal transmission in the base band
11/1991
11/27/1991EP0458648A2 Communication interface for serial transmission of variable length data tokens
11/27/1991EP0458186A2 Arrangement for reduction of phase jitter
11/26/1991US5068854 Error detection for fiber distributed interfaced optic link
11/26/1991CA1292584C Antenna selection control circuit
11/21/1991EP0457704A1 Method of preventing lockup of asynchronous modems
11/21/1991EP0457602A2 Data security in multi-carrier communication systems
11/21/1991EP0457460A2 Spacediversity switching receiver
11/21/1991EP0457448A1 Receiver systems
11/21/1991EP0263175A4 Apparatus and method for encoding and decoding attribute data into error checking symbols of main data
11/19/1991US5067173 Microcellular communications system using space diversity reception
11/14/1991WO1991017503A1 Forward error correction code system
11/13/1991EP0456625A1 A method of transmitting different commands relating to the choice of transmitter antenna in a time multiplex radio communication system
11/12/1991WO1991018458A1 A high frequency multichannel diversity differential phase shift (dpsk) communications system
11/12/1991US5065452 Digital traffic news evaluation method
11/12/1991US5065423 Paging system with registration mode
11/12/1991US5065411 Diversity receiving system for use in digital radio communication with means for selecting branch by estimating propagation path property
11/12/1991US5065399 Telecommunication network trouble recovery system
11/12/1991CA2082626A1 High frequency multichannel diversity differential phase shift (dpsk) communications system
11/06/1991CN1056027A Data communication apparatus
11/05/1991CA1291830C Multiplex wiring system
10/1991
10/31/1991WO1991016777A1 Process for determining quality parameters in a transmission path for digital-data streams with a cellular structure
10/31/1991WO1991016697A1 Link protocol for rs 232 communication
10/30/1991EP0454585A1 An antenna selection diversity reception system
10/30/1991EP0454249A1 Dynamic switching device for masking errors in a system with a duplicate digital channel
10/30/1991EP0454246A1 Phase-adjusting circuit for signals in a system with double digital links
10/30/1991EP0454036A1 Method and device for going back to a normal connection after the use of a help connection in a data transmission system
10/24/1991DE4012850A1 Digital transmission path quality parameter measurement - using measuring signal with sequence of test cells each containing binary test pattern
10/22/1991US5060226 Telecommunications network test system
10/16/1991EP0452289A1 Method of selecting the most suitable receiver antenna from two or more receiver antennas
10/16/1991EP0452124A2 Wireless information transmission system
10/16/1991EP0451289A1 Digital demodulator
10/15/1991US5058143 Digital communications systems
10/15/1991CA1290811C Method for detecting blankings in a digital microwave link and reception chainusing said method
10/09/1991EP0290526B1 Hf data communications system with network management
10/09/1991EP0224556B1 Ensemble modem structure for imperfect transmission media
10/08/1991US5056117 Decision feedback equalization with trellis coding
10/08/1991US5056112 Interleaving in coded modulation for mobile radio
10/08/1991US5056090 Data transmission apparatus to be connected to multiplexed transmission line
10/08/1991CA1290401C Trunked radio repeater system
10/02/1991EP0449327A2 Noise-immune space diversity receiver
10/02/1991EP0449201A1 Method for the sequential decoding of a digital data stream with an error correcting code of the convolutional type
10/02/1991EP0448809A2 A bit serial viterbi decoder add/compare/select array
10/01/1991US5054111 Hf data communications system with network management
10/01/1991US5054037 Method of servo-controlling the parameters of a modulator having 2n phase and amplitude states, and a circuit for implementing the method
10/01/1991US5054035 Digital signal quality evaluation circuit using synchronization patterns
10/01/1991US5054034 Ensemble modem structure for imperfect transmission media
10/01/1991CA1290021C Trunked radio repeater system
09/1991
09/25/1991EP0448492A1 Apparatus for the transmission of digital data with at least two levels of protection, and corresponding receiver
09/25/1991EP0448405A2 Data communication apparatus using memory means for error detection
09/25/1991EP0448251A2 Demodulating system capable of accurately equalizing received signals using error correction codes
09/25/1991EP0448069A2 Diversity circuit and frame phase (or sampling timing) estimation circuit using the diversity circuit
09/25/1991EP0448045A1 System for suppressing spread of error generated in differential coding
09/25/1991EP0448015A2 Mobile radio communication system
09/25/1991EP0210181B1 Dispatch trunked radio system
09/24/1991US5052020 Method of and apparatus for controlling modulation of digital signals in frequency-modulated transmissions
09/24/1991US5052000 Technique for improving the operation of decision feedback equalizers in communications systems utilizing error correction
09/24/1991US5051999 Programmable error correcting apparatus within a paging receiver
09/24/1991US5051979 Method and apparatus for errorless switching
09/24/1991US5051899 Data transmission error detection in an electronic cash register system
09/24/1991CA1289667C Multi-dimensional coding for error reduction
09/21/1991WO1991015063A1 Cable television radio frequency subscriber data transmission apparatus and calibration method
09/21/1991WO1991015062A1 Cable television radio frequency data processor
09/21/1991CA2078562A1 Cable television radio frequency data processor
09/21/1991CA2078548A1 Cable television radio frequency subscriber data transmission apparatus and calibration method
09/20/1991WO1991015071A1 Integrated cellular communications system
09/19/1991WO1991014314A1 Process for the mobile reception of digital signals
09/19/1991DE4008502A1 Verfahren zum mobilen empfang von digitalen signalen A method for mobile reception of digital signals
09/18/1991EP0446276A1 Adaptive rate control for echo cancelling modem.
09/17/1991CA1289260C Word synchronizer
09/17/1991CA1289259C Burst signal detection apparatus
09/17/1991CA1289253C Decoder with reduced synchronization capture time
09/12/1991DE4007167A1 Security recognition monitoring circuitry for data transmission - evaluates frequencies and compares with threshold value for quality test
09/11/1991EP0445730A2 Error correction system capable of correcting an error in a packet header by the use of a Reed-Solomon code
09/11/1991EP0445384A2 Method and circuit arrangement for threshold control
09/11/1991EP0371032A4 Protection of energy information in sub-band coding
09/11/1991EP0341256A4 Modem and method using multidimensional coded modulation
09/10/1991US5048057 Wireless local area network
09/10/1991US5048054 Line probing modem
09/10/1991US5047859 Method and apparatus for communication channel identification and signal restoration
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