| Patents for H04L 1 - Arrangements for detecting or preventing errors in the information received (103,402) |
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| 02/03/1987 | US4641327 Frame synchronization in trellis-coded communication systems |
| 02/03/1987 | US4641318 Method for improving the reliability of data transmission over Rayleigh fading channels |
| 02/03/1987 | US4641310 Data processing system in which unreliable words in the memory are replaced by an unreliability indicator |
| 02/03/1987 | US4641309 Method and apparatus for selectively compensating burst errors of variable length in successive digital data words |
| 02/03/1987 | US4641126 Multiple-mode electrical power and communications interface |
| 01/29/1987 | WO1987000713A1 Asynchronous addressable electronic key telephone system |
| 01/29/1987 | DE3613475A1 Circuit arrangement for the interference-free switch-over of digital audio signals |
| 01/28/1987 | EP0209902A2 Multilevel modulator comprising a compact error correcting code producing unit |
| 01/28/1987 | CN85105744A 无线电接收机 Radio receiver |
| 01/27/1987 | US4639934 Line impairment display for digital modems |
| 01/27/1987 | US4639548 Digital communication system including an error correcting encoder/decoder and a scrambler/descrambler |
| 01/14/1987 | EP0208558A2 A CMI signal transmission system |
| 01/14/1987 | EP0208537A2 Communication systems |
| 01/14/1987 | EP0208270A2 Microwave relay station having a common standbby channel for signals of different types of modulation |
| 01/14/1987 | CN85105321A Error detecting code circuit used in digital communication system |
| 01/10/1987 | CN85101153A Alternating communication channel switchover system |
| 01/07/1987 | EP0207243A2 Error correction mechanism |
| 01/06/1987 | US4635275 Method and apparatus for detecting synchronous or asynchronous data transmission |
| 01/06/1987 | US4635262 Method of detecting synchronization errors in a data transmission system using a linear block code |
| 01/06/1987 | US4635257 Fail safe circuit for multi-signal transmission system |
| 01/06/1987 | US4635237 Data transmission system for seismic streamers |
| 12/30/1986 | US4633473 Fault tolerant communications interface |
| 12/30/1986 | US4633465 Eye violation detectors |
| 12/30/1986 | US4633464 Control signalling arrangement for a digital transmission system |
| 12/30/1986 | EP0206770A2 Coded modulation system with a simplified decoder capable of reducing the effects of channel distortion |
| 12/30/1986 | EP0205667A1 System for transmitting words that are protected by a combination of a block code and a convolution code, transmitter device for use in such system and receiver for use in such system |
| 12/30/1986 | EP0124594B1 Method and apparatus for transmitting and receiving data messages |
| 12/30/1986 | EP0081499B1 Data operated squelch |
| 12/23/1986 | US4631735 Coded modulation system with feedback |
| 12/23/1986 | US4631695 Detector of predetermined patterns of encoded data signals |
| 12/18/1986 | WO1986007514A1 Digital communication equipment |
| 12/16/1986 | US4630290 Squelch signal generator capable of generating a squelch signal with a high reliability |
| 12/16/1986 | US4630126 Method of signal transmission with selected signal transmission rate |
| 12/16/1986 | US4630032 Apparatus for decoding error-correcting codes |
| 12/10/1986 | EP0204635A1 Method for transmitting digital information in word blocks |
| 12/09/1986 | US4628517 Digital radio system |
| 12/09/1986 | US4628507 Bit error detection circuit for PSK-modulated carrier wave |
| 12/04/1986 | WO1986007223A1 Ensemble modem structure for imperfect transmission media |
| 12/03/1986 | EP0203140A1 A method and apparatus in radio reception for avoiding storing a message more than once. |
| 12/03/1986 | EP0203139A1 Method and receiver for receiving messages sent by radio. |
| 12/02/1986 | US4627071 Distortion analyzer for quadrature demodulated data |
| 12/02/1986 | US4627045 Alternating communication channel switchover system |
| 12/02/1986 | US4626789 Demodulating circuit for data signal |
| 12/02/1986 | US4626716 Digital signal delay circuit |
| 12/02/1986 | CA1214879A1 Digital transmission system |
| 11/26/1986 | CN86103406A Ensemble modem structure for imperfect transmission media |
| 11/25/1986 | US4625314 Method for the recognition of the outage of one or more transmission channels in a redundantly designed optical transmission system |
| 11/20/1986 | WO1986006899A1 Jitter measurement method and apparatus |
| 11/20/1986 | EP0201977A2 Antenna diversity reception arrangement for eliminating reception disturbances |
| 11/20/1986 | EP0201634A1 Digital word generator for automatically generating periodic permanent signals from n bit words of all weights and their permutations |
| 11/19/1986 | CN85103949A Multilevel signal monitor circuit |
| 11/12/1986 | EP0200842A1 Modem controlling a modem network |
| 11/12/1986 | CA1213946A Circuit for limiting jitter transients during switching |
| 11/11/1986 | US4622685 RTS/DCD simulator |
| 11/11/1986 | US4622682 Communication system |
| 11/11/1986 | US4622550 Data communication system |
| 11/05/1986 | EP0200505A2 Apparatus for transmitting streams of information bits and methods for estimating the most likely sequence sent |
| 11/05/1986 | CN86101893A Data communication apparatus |
| 11/04/1986 | US4621374 Circuit arrangement for processing, transmitting, and acoustically reproducing digitized audio-frequency signals |
| 11/04/1986 | US4621368 Digital transmission system |
| 11/04/1986 | CA1213649A1 Secondary channel method and apparatus |
| 10/28/1986 | US4620294 Digital signal processor modem |
| 10/21/1986 | US4618955 Digital data transmission system |
| 10/15/1986 | EP0197545A2 Error control encoding system, method and device |
| 10/15/1986 | CN86100949A Subscriber rf telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of rf channels |
| 10/14/1986 | US4617678 Apparatus for detecting and recovering binary data from an input signal |
| 10/14/1986 | US4617677 Data signal reading device |
| 10/14/1986 | US4617657 Transmitting sequence numbers of information in a packet data transmission system |
| 10/07/1986 | US4616364 Digital hopped frequency, time diversity system |
| 10/07/1986 | US4616362 Logic for calculating bit error rate in a data communication system |
| 10/07/1986 | US4616361 Digital signal and multiplex device |
| 10/07/1986 | CA1212419A1 Differentially nonlinear convolutional channel coding with expanded set of signalling alphabets |
| 09/30/1986 | US4615040 High speed data communications system |
| 09/30/1986 | CA1212153A1 Timing delay equalization circuit |
| 09/25/1986 | WO1986005639A1 Signal quality steered diversity |
| 09/24/1986 | EP0195598A2 Universal protocol data receiver |
| 09/24/1986 | EP0195421A2 Method and arrangement for the synchronisation of digital information signals |
| 09/17/1986 | EP0194920A1 Autoadaptive and hybrid data transmission method, especially for space telecommunication, and apparatuses for carrying out such a method |
| 09/17/1986 | EP0194902A1 Method and system for spread spectrum transmission, especially for information transmission in an electric power distribution network |
| 09/16/1986 | CA1211528A1 Fail-safe transmission system |
| 09/12/1986 | WO1986005339A1 Data transmission |
| 09/03/1986 | EP0193410A2 Data communication apparatus |
| 09/03/1986 | EP0193332A2 Received signal processing apparatus |
| 09/03/1986 | EP0193091A2 Data retransmitting method in communication network |
| 08/20/1986 | EP0191421A2 Monitoring circuit for digital signals |
| 08/19/1986 | US4607256 Plant management system |
| 08/19/1986 | CA1210169A1 Vehicle multiplex system having protocol/format for secure communication transactions |
| 08/19/1986 | CA1210145A1 Error correction in digital television signals |
| 08/19/1986 | CA1210073A1 Space diversity system |
| 08/13/1986 | EP0190951A1 Method and apparatus for exchanging messages in a ring network |
| 08/12/1986 | US4606047 High frequency communications |
| 08/12/1986 | US4606044 Adjusting data transmission rate based on received signal quality |
| 08/12/1986 | US4606029 Data transmission system |
| 08/12/1986 | US4606028 Digital transmission system |
| 08/12/1986 | US4606026 Error-correcting method and apparatus for the transmission of word-wise organized data |
| 08/12/1986 | CA1209731A1 Test tone detector apparatus and method modem using same |
| 08/12/1986 | CA1209665A1 Digital signal transmission method |
| 08/05/1986 | US4604748 Data processing system with error correction |
| 08/05/1986 | US4604745 Method of searching fault locations in digital transmission line |
| 08/05/1986 | US4604657 Apparatus for processing PCM signal |