Data communication system with random and burst error protection

Details Data communication system with random and burst error protection Data communication system with random and burst error protection

1977-09-06

1979-05-29

Atkinson, Charles E.

Communications: electrical

Digital comparator systems

G06F 1112

Patent

active

041568672

ABSTRACT:
A data communication system for use in the control and monitoring of mobile stations, for example, in a bus monitoring system, from a central station over a communication channel carrying both data and voice information. Information is encoded into digital messages having a start code followed by one or more data blocks. The start code identifies the beginning of the data block that follows and enables synchronization of clock circuitry to the received data frequency. The data blocks have N digital words with M binary bits where one word is a parity word and N-1 words are data words. Each of the data words has a data portion and parity portion coded for correction of at least one error. Reliability is enhanced by a data detector which discriminates between data and noise or voice to provide an indication of the presence of data. In transmitting the digital messages, the bits of the N words in each data block are interleaved to provide protection against error bursts.

REFERENCES:
patent: 3037697 (1962-06-01), Kahn
patent: 3234364 (1966-02-01), Marko
patent: 3423729 (1969-01-01), Heller
patent: 3560924 (1971-02-01), McBride
patent: 3753228 (1973-08-01), Nickolas et al.
patent: 3930121 (1975-12-01), Mathiesen
Brodd and Donnan, Cyclic Redundancy Check for Variable Bit Code Widths, IBM Technical Disclosure Bulletin, vol. 17, No. 6, Nov. 1974, pp. 1708-1709.

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