Accession Number : AD0287453

Title :   UPPER BOUND TO THE CAPACITY OF A LINEAR TIMEVARYING CHANNEL WITH ADDITIVE GAUSSIAN NOISE

Corporate Author : MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s) : Forney,G. David , Jr

Report Date : 26 SEP 1962

Pagination or Media Count : 1

Abstract : The analysis is concerned with the evaluation of the upper bound to the capacity of a linear time-varying channel obtained by finding the capacity of the same channel when its behavior at all times is known a priori. Numerical evaluation turns out to depend on the ditribution of the eigenvalues of a random infinite-dimensional matrix, which is apparently an unsolved mathematical problem. Evaluation is possible in two special ases: first, where the channel is not time-varying in which case the capacity formula reduces to that formerly known; second, when the channel has no memory, that is y = ax + u, where a is random and n is white and gaussian. 9author)

Descriptors :   *COMMUNICATION SYSTEMS, *MATRICES(MATHEMATICS), *NUMERICAL ANALYSIS, *PROBABILITY, *STATISTICAL DISTRIBUTIONS, DETERMINANTS(MATHEMATICS), INEQUALITIES, NOISE, SEQUENCES(MATHEMATICS), TRANSFORMATIONS (MATHEMATICS)

Distribution Statement : APPROVED FOR PUBLIC RELEASE