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Robust Blind Equalization Algorithms Based on the Constrained Maximization of a Fourth-Order Cumulant Function
Kiyotaka KOHNO Mitsuru KAWAMOTO Asoke K. NANDI Yujiro INOUYE
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/05/01
Online ISSN: 1745-1337
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Digital Signal Processing
blind equalization, Gaussian noise, single-input single-output infinite impulse response (SISO-IIR) systems, fourth-order cumulant functions, eigenvector algorithms,
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The present letter deals with the blind equalization problem of a single-input single-output infinite impulse response (SISO-IIR) channel with additive Gaussian noise. To solve the problem, we propose a new criterion for maximizing constrainedly a fourth-order cumulant. The algorithms derived from the criterion have such a novel property that even if Gaussian noise is added to the output of the channel, an effective zero-forcing (ZF) equalizer can be obtained with as little influence of Gaussian noise as possible. To show the validity of the proposed criterion, some simulation results are presented.