Blind equalization of multilevel PAMm data for nonminimum phase channels via 2nd-order and 4th-order cumulants

F C ZHENG, S MCLAUGHLIN, B MULGREW

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8 Citations (Scopus)

Abstract

This paper introduces a new blind equalisation algorithm for the pulse amplitude modulation (PAM) data transmitted through nonminimum phase (NMP) channels. The algorithm itself is based on a noncausal AR model of communication channels and the second- and fourth-order cumulants of the received data series, where only the diagonal slices of cumulants are used. The AR parameters are adjusted at each sample by using a successive over-relaxation (SOR) scheme, a variety of the ordinary LMS scheme, but with a faster convergence rate and a greater robustness to the selection of the 'step-size' in iterations. Computer simulations are implemented for both linear time-invariant (LTI) and linear time-variant (LTV) NMP channels, and the results show that the algorithm proposed in this paper has a fast convergence rate and a potential capability to track the LTV NMP channels.

Original languageEnglish
Pages (from-to)313-327
Number of pages15
JournalSignal Processing
Volume31
Issue number3
DOIs
Publication statusPublished - Apr 1993

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