Accession Number : AD0643864

Title :   SEQUENTIAL CODING SCHEMES FOR AN ADDITIVE NOISE CHANNEL WITH A NOISY FEEDBACK LINK.

Descriptive Note : Technical rept., May-Aug 66,

Corporate Author : COMPUTATION LAB HARVARD UNIV CAMBRIDGE MASS

Personal Author(s) : Kashyap,R. L.

Report Date : AUG 1966

Pagination or Media Count : 39

Abstract : A coding scheme for additive Gaussian channel is developed using a noisy feedback link and D-dimensional elementary signals with no bandwidth constraint. This allows error free transmission at a rate R < R sub c where R sub c is slightly less than the channel capacity C. When there is no noise in the Feedback channel, the coding scheme reduces to a D-dimensional generalization of the coding scheme of Schalkwijk and Kailath. In addition, the expression for the probability of error is determined when T, the time of transmission rate is finite. Our scheme is also compared with the best codes which use only the forward channel. (Author)

Descriptors :   (*CODING, INFORMATION THEORY), FEEDBACK, PROBABILITY, ERRORS, DATA TRANSMISSION SYSTEMS, NOISE(RADIO)

Subject Categories : Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE