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A Study on the Complex-Channel Blind Equalization Using ITL Algorithms  

Kim, Nam-Yong (강원대학교 공학대학 전자정보통신공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.35, no.8A, 2010 , pp. 760-767 More about this Journal
Abstract
For complex channel blind equalization, this study presents the performance and characteristics of two complex blind information theoretic learning algorithms (ITL) which are based on minimization of Euclidian distance (ED) between probability density functions compared to constant modulus algorithm which is based on mean squared error (MSE) criterion. The complex-valued ED algorithm employing constant modulus error and the complex-valued ED algorithm using a self-generated symbol set are analyzed to have the fact that the cost function of the latter forces the output signal to have correct symbol values and compensate amplitude and phase distortion simultaneously without any phase compensation process. Simulation results through MSE convergence and constellation comparison for severely distorted complex channels show significantly enhanced performance of symbol-point concentration with no phase rotation.
Keywords
Blind Equalizer; Complex Channel; Euclidian Distance; Constant Modulus Error; Phase Distortion; ITL;
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