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)
04/1980
04/16/1980EP0009592A1 Method and circuit for testing a communication station
04/08/1980US4197502 Digital signal detector
04/01/1980CA1074920A1 Detection of errors in digital signals
03/1980
03/19/1980EP0008608A1 Circuit arrangement for carrying out a loop test for data transmission lines
03/11/1980US4193062 Triple random error correcting convolutional code
02/1980
02/26/1980CA1072640A1 Digital carrier wave detect circuitry
02/20/1980EP0008016A1 Method as well as transmitting and receiving apparatus for data transmission with adaptive error correctron
02/12/1980US4188616 Method and system for transmitting and receiving blocks of encoded data words to minimize error distortion in the recovery of said data words
02/12/1980US4188615 Bit error detecting circuit for use in a digital signal transmission line
02/05/1980US4187466 Signal injection technique
01/1980
01/15/1980CA1070023A1 Method of automatically testing a data transmission system
01/09/1980EP0006325A1 Data transmission system for interconnecting a plurality of data processing terminals
01/08/1980US4182988 PCM channel monitoring system for detecting errors using single parity bit
01/01/1980US4181914 System for reducing transmission problems in a parallel digital data transmission system
12/1979
12/18/1979CA1068410A1 Error correction code and apparatus for the correction of differentially encoded quadrature phase shift keyed data (dqpsk)
12/18/1979CA1068348A1 Baseband signal switching arrangement for diversity reception in pcm radio communication system
12/11/1979US4178582 Digital signal transmitter/receiver system including programmable self-test capability
12/11/1979US4178550 Method and apparatus to permit substantial cancellation of interference between a received first and second signal
12/04/1979US4177447 Device for detecting errors in a digital transmission system
11/1979
11/27/1979US4176248 System for identifying and correcting the polarity of a data signal
11/14/1979EP0005317A1 Data receiving apparatus
11/13/1979US4174502 Delta modulated digital signal detector
11/13/1979CA1066421A1 Method and apparatus for uniquely encoding channels in a digital transmission system
10/1979
10/30/1979CA1065409A1 Improving error rate on radio teletype circuits
10/23/1979CA1065020A1 High reliability diversity communications system
10/09/1979CA1064112A1 Mobile diversity radio communication system
09/1979
09/18/1979US4168487 Code detection circuit
09/11/1979US4167701 Decoder for error-correcting code data
09/04/1979CA1061912A1 Data transmission system
08/1979
08/28/1979CA1061469A1 Signal correlator
08/22/1979EP0003480A2 Circuit for converting binary information by means of check bits
08/21/1979US4165488 Derangement detector in a receiver of a system for data transmission by means of phase modulation of a carrier
08/14/1979US4164629 Time base for synchronous generation of frame and clock pulses
07/1979
07/31/1979US4163210 Arrangement for checking a contact inserted between a transmitter circuit and a receiver circuit to allow electrical signals to be transmitted
07/17/1979US4161720 Meter terminal unit for use in automatic remote meter reading and control system
07/17/1979US4161719 System for controlling synchronization in a digital communication system
07/17/1979US4161718 Supervisory control system
07/10/1979US4160877 Multiplexing of bytes of non-uniform length with end of time slot indicator
06/1979
06/26/1979US4159470 Data communications systems employing redundant series transmission loops
06/26/1979US4159469 Method and apparatus for the coding and decoding of digital information
06/12/1979US4158193 Data transmission test set with synchronization detector
06/12/1979CA1056463A1 Transmission level indicator
05/1979
05/29/1979US4156910 Nested data structures in a data driven digital data processor
05/29/1979US4156909 Structured data files in a data driven digital data processor
05/29/1979US4156908 Cursive mechanism in a data driven digital data processor
05/29/1979US4156903 Data driven digital data processor
05/29/1979US4156867 Data communication system with random and burst error protection and correction
05/29/1979US4156847 Method and apparatus for confirming transmission in bidirectional CATV system
05/22/1979US4156111 Apparatus for transition between network control and link control
05/15/1979CA1054721A1 In band signalling
04/1979
04/10/1979US4149142 Signal transmission system with an error control technique
04/10/1979US4149069 Safety circuit for a data processing system producing binary signals
04/03/1979US4147891 Arrangement for distribution of clock signals
03/1979
03/13/1979US4144522 Electro-control system for data transmission
03/06/1979US4143354 Detection of errors in digital signals
02/1979
02/27/1979US4142155 Diversity system
02/06/1979CA1047937A1 Arrangement for testing telecommunication repeaters
01/1979
01/30/1979US4137556 Protection circuit for a data transmission system
01/09/1979US4134103 Error-rejecting data transmission system
01/09/1979US4133504 System for protected data transmission to track-bound vehicles
01/02/1979US4132975 Majority decision device
01/02/1979CA1045722A1 Communications system
12/1978
12/26/1978CA1045207A1 Test apparatus and method
12/20/1978EP0000039A1 A data transmission process and system to permit substantial reduction of interference between a received first and second digital signal
12/20/1978EP0000002A1 Tetrahydrofurane derivatives, processes for their preparation and their use as herbicides
12/20/1978EP0000001A1 Thermal heat pump
12/19/1978US4130818 Analog threshold decoding
12/19/1978CA1044828A1 Method and apparatus for remote control monitoring and localizing of pulse repeater-regenerators
12/19/1978CA1044800A1 Data resynchronization
12/05/1978US4128809 Time diversity receiver for processing repeatedly received signal bits in consideration of a maximum-level and/or a favorably received signal bit
11/1978
11/28/1978US4127816 Carrier detect and automatic loopback circuit
11/21/1978US4126764 Partial byte receive apparatus for digital communication systems
11/14/1978US4125764 Transversal correlator error detector
11/14/1978US4125746 Partial byte transmit apparatus for digital communication systems
10/1978
10/17/1978US4121195 Error detection in digital systems
10/10/1978US4119945 Error detection and correction
10/03/1978CA1039814A1 Coherent, fixed baud rate fsk communication method and apparatus
09/1978
09/26/1978CA1039361A1 Synchronous, non return to zero bit stream detector
09/19/1978CA1038977A1 Data modems with automatic equalization, drop-out detection and data echo protection
08/1978
08/29/1978US4110735 Error detection and correction
08/29/1978US4110558 Data transmission system
08/15/1978US4107656 Data communication receiver and transfer apparatus
07/1978
07/11/1978US4100531 Bit error rate measurement above and below bit rate tracking threshold
07/04/1978US4099121 Spatial diversity satellite communications system with error control
06/1978
06/27/1978US4097697 Digital signal performance monitor
06/06/1978US4093940 System and equipment for quality checking of a digital connection circuit
05/1978
05/30/1978US4092630 System for error control and phasing in interconnected arq-circuits
05/30/1978US4092605 Phase delay simulator
05/30/1978US4092492 Clockless serial data transfer
05/23/1978US4091361 Noise-immune carrier current actuated control
05/23/1978US4091240 Bit error rate performance monitor units in digital transmission links
05/23/1978US4091239 Bit error rate performance monitor units in digital transmission links
05/16/1978US4090173 Vital digital communication system
05/09/1978US4088906 Transmission level indicator
05/09/1978US4088833 Carrier detector
05/02/1978US4087787 Decoder for implementing an approximation of the Viterbi algorithm using analog processing techniques
05/02/1978US4087677 Digital PSK modem
04/1978
04/25/1978US4086566 Error detector for modified duobinary signals
04/18/1978US4085368 Interference canceling method and apparatus
04/04/1978US4083009 High reliability diversity communications system
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