
Accession Number : AD0753873
Title : Optimal Equalization of Discrete Signals Passed through a Random Channel,
Corporate Author : RENSSELAER POLYTECHNIC INST TROY N Y
Personal Author(s) : Ramachandran,Raj ; Steenaart,Willem
Report Date : DEC 1972
Pagination or Media Count : 22
Abstract : The problem of equalizing a discrete signal that has been transmitted through a channel selected at random from an ensemble of channels is considered. Using meansquare error as the performance index, the minimum number of adjustable parameters required to achieve a given level of performance is sought. For certain special cases it is shown that, using nonrecursive sampled data filters, the optimum tap weights are given by the eigenvectors of the matrix formed from the covariances of the channel's impulse response. A numerical algorithm is developed to find the optimum equalizer structure for a wide class of channels with the restriction that the number of channels in the given ensemble is finite. Results worked out for several examples show that the optimum equalizer structure requires significantly fewer adjustable parameters than the standard transversal equalizer in order to obtain the same level of performance. (Author)
Descriptors : (*INFORMATION THEORY, DATA TRANSMISSION SYSTEMS), RANDOM VARIABLES, STATISTICAL ANALYSIS, MATRICES(MATHEMATICS), WHITE NOISE, TELEPHONE SYSTEMS, SIDEBANDS, INTEGRAL TRANSFORMS
Subject Categories : Cybernetics
Nonradio Communications
Distribution Statement : APPROVED FOR PUBLIC RELEASE