Accession Number : AD0714769

Title :   Correction and Control of Information in the Memory Device of a Supervisory-Control System,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Alekseev,V. N. ; Damaskinskaya,N. Ya ; Marakhovskii,V. B.

Report Date : 12 AUG 1970

Pagination or Media Count : 12

Abstract : Applicability of the '2 out of 5' code to supervisory-control systems, which detect all single and double errors and correct single errors, is considered. Representation of m decimal digits of a word in the '2 out of 5' code, with 5 check tags per word, is examined. The '2 out of 5' code has near-minimal redundancy and permits detecting and correcting errors with less equipment than the Hamming code; the latter requires particularly complicated parity check. It is found that: the use of the '2 out of 5' code in supervisory-control systems with an elementwise parity check permits obtaining a very high transmission fidelity because all single and double and 98 percent higher-multiple errors can be detected; storing and transmitting information in this code is very reliable: all single and 70 percent double errors are corrected; the checking and correcting circuits in this code do not require much equipment, and hence may be recommended for complex information systems.

Descriptors :   (*CONTROL SYSTEMS, *CODING), PROBABILITY, DECODING, ERRORS, USSR

Subject Categories : Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE