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)
03/1982
03/10/1982EP0046831A1 System for the retransmission of incorrectly received numbered frames in a data transmission system
03/09/1982CA1119729A1 Error correcting system
03/02/1982CA1119303A1 Transmission and/or recording of digital signals
03/02/1982CA1119271A1 Receiver for digital signals in line code
02/1982
02/24/1982EP0046323A1 Method of writing and reading sector-organized information into and out of a record carrier body and device for performing the method
02/23/1982US4317207 Data transmission system
02/23/1982US4317202 Circuit arrangement for correction of data
02/23/1982US4317197 Transparent intelligent network for data and voice
02/23/1982US4317196 Transparent intelligent network for data and voice
02/23/1982US4317080 Signal monitor system
02/16/1982US4316283 Transparent intelligent network for data and voice
01/1982
01/27/1982EP0044555A1 Regenerator with tester for violation of the coding rule
01/27/1982EP0044554A1 Supervisory arrangement for a PCM regenerator with tester for violation of the coding rule
01/26/1982CA1117205A1 Packet-switched data communications system
01/20/1982EP0044098A1 System for testing a modem
01/19/1982US4312074 Method and apparatus for detecting a data signal including repeated data words
01/19/1982US4312070 Digital encoder-decoder
01/19/1982US4312065 Transparent intelligent network for data and voice
01/19/1982CA1116698A1 Duplex transmitting-receiving station
01/19/1982CA1116697A1 Directive radio communication transmission system for maintaining the alignment of transmission and receiver antennae
01/13/1982EP0043432A2 Error detecting device for synchronous data transmission system
01/05/1982US4309771 Digital radio transmission system
01/05/1982US4309764 Technique for increasing the rain margin of a satellite communication system
12/1981
12/30/1981EP0042650A1 Transmitting-receiving system for teleprinter traffic via communication paths according to the ARQ-system with bunched repetition
12/30/1981EP0042642A1 FSK modem local test system
12/30/1981EP0042576A1 Interference suppressing device comprising drivers with common supply
12/29/1981US4308613 Simplex, party-line electromagnetic data packet transmission system with a self seeking alternate routing capability
12/23/1981EP0042229A1 Digital transmission systems
12/16/1981EP0041895A1 Method and device for the transmission of digital data packets
12/15/1981US4306305 PCM Signal transmitting system with error detecting and correcting capability
12/10/1981WO1981003590A1 Converter of p-codes into analog values
12/08/1981US4305150 On-line channel quality monitor for a communication channel
12/01/1981US4304001 Industrial control system with interconnected remotely located computer control units
12/01/1981US4303941 Videotex system
12/01/1981CA1113544A1 Radio-communications transmission
11/1981
11/24/1981CA1113158A1 Digital transmission and reception of information
11/17/1981US4301533 Technique for increasing the rain margin of a TDMA satellite communication system
11/17/1981US4301530 Orthogonal spread spectrum time division multiple accessing mobile subscriber access system
11/11/1981EP0030551A4 A technique for increasing the rain margin of a communication system.
11/04/1981EP0039191A2 Digital data transmission system with adaptive data transmission rate
11/04/1981EP0039150A2 Methods of and apparatuses for processing binary data
11/03/1981US4298984 Method and apparatus for improving error rate on radio teletype circuits
11/03/1981US4298982 Fault-tolerant interface circuit for parallel digital bus
10/1981
10/20/1981US4296495 Device for measuring the quality of a digital radio link
10/13/1981CA1110774A1 Partial byte receive apparatus for digital communication systems
10/13/1981CA1110766A1 Digital signal transmitter/receiver system including programmable self-test capability
09/1981
09/29/1981CA1109964A1 Error-rejecting data transmission system
09/22/1981US4291408 System for monitoring bit errors
09/22/1981US4291406 Error correction on burst channels by sequential decoding
09/22/1981US4291405 Error reduction speech communication system
09/22/1981US4291403 Digital implementation of parity monitor and alarm
09/21/1981EP0031375A4 Apparatus and an improved method for processing of digital information.
09/08/1981CA1108766A1 Digital signal transmitting system
09/01/1981US4287508 Information transmitting and receiving apparatus
09/01/1981CA1108261A1 Fault locating apparatus for digital transmission system
08/1981
08/26/1981EP0034467A1 Receivers suitable for use in remotely-operable switching devices and data transmission systems
08/25/1981US4286334 Microprocessor controlled iterative switching FM/PM receiver for reconstructing noise-corrupted redundantly transmitted information
08/18/1981US4284843 Repeating station for use in digital data communications link
08/11/1981CA1106919A1 Method and device for determining the phase intercept in a system employing phase-shift keying modulation
08/05/1981EP0033228A2 Industrial control system
08/04/1981US4281709 Thermal heat pump
08/04/1981CA1106503A1 Apparatus for transition between network control and link control
07/1981
07/29/1981EP0032579A1 Method for the assignment of time-slots of a time division multiplex system with dynamic multiplexers
07/28/1981US4281411 High speed digital communication receiver
07/28/1981CA1106086A1 Channel monitoring system
07/15/1981EP0031943A1 Control of transmission lines for digital signals
07/14/1981CA1105144A1 Bit error detecting circuit for use in a digital signal transmission line
07/14/1981CA1105109A1 Test set for measuring jitter distortion of data pulses
07/09/1981WO1981001933A1 Message format for secure communication over data links
07/09/1981WO1981001932A1 Communication control device in a duplex transmission network
07/08/1981EP0031375A1 Apparatus and an improved method for processing of digital information
07/07/1981US4277838 Data receiving apparatus
07/07/1981US4277807 Recording digital signals
07/07/1981CA1104662A1 Signal generator for producing signals for a remote control
06/1981
06/30/1981US4276656 Apparatus and method for replacement of a parallel, computer-to-peripheral wire link with a serial optical link
06/30/1981US4276651 Clock circuitry for a data communication system
06/30/1981US4276649 Receiver for digital signals in line code
06/30/1981US4276646 Method and apparatus for detecting errors in a data set
06/24/1981EP0030720A2 Method and apparatus for noise margin measurement and error probability prediction
06/24/1981EP0030629A2 Apparatus for feeding a data drain with data words while using a series-parallel converter
06/24/1981EP0030628A2 Device for serial transmission of data words existing in parallel while using a parallel-series converter
06/24/1981EP0030551A1 A technique for increasing the rain margin of a communication system.
06/23/1981CA1103763A1 Signal injection technique
06/16/1981US4273970 Intermodulation distortion test
06/16/1981US4273955 System for in-service quantitative performance analysis of data communications system
06/09/1981US4272651 Optical system having diode laser light source
06/09/1981CA1102880A1 Method and apparatus to permit substantial cancellation of interference between a received first and second signal
06/02/1981US4271525 Adaptive diversity receiver for digital communications
06/02/1981US4271520 Synchronizing technique for an error correcting digital transmission system
06/02/1981US4271514 Loopback test for data transmission paths
06/02/1981US4271513 Method and apparatus for carrying out loopback test
05/1981
05/27/1981EP0029226A1 System for processing audio PCM digital signals
05/27/1981EP0029216A1 Data transmission device with a buffer memory and devices for data protection
05/27/1981EP0029215A1 Data transmission device with a buffer memory and device for data protection
05/27/1981EP0029209A1 Circuitry for storing information in data transmission technique subscriber posts
05/26/1981US4270210 Digital diversity receiver, comprising an APC loop for locking instants of read-out of buffer memories to an averaged phase of signals supplied thereto
05/26/1981US4270185 Memory control circuitry for a supervisory control system
05/20/1981EP0028857A1 Device for carrier detection in a modem provided with an echo canceller
05/13/1981EP0028298A2 Method for the transmission of digital signals by means of a signal generator
05/05/1981CA1100639A1 Error detection device in a line of a digital transmission system
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