Crosstalk Equalization for High-Speed Digital Transmission Systems

Hui-Chul WON  Gi-Hong IM  

Publication
IEICE TRANSACTIONS on Communications   Vol.E86-B   No.3   pp.1063-1072
Publication Date: 2003/03/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technology
Keyword: 
cyclostationary crosstalk interference,  fractionally-spaced equalizer,  crosstalk equalization and cancellation,  xDSL and high-speed LAN environments,  

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Summary: 
In this paper, we discuss crosstalk equalization technique for high-speed digital transmission systems. This equalization technique makes use of the cyclostationarity of the crosstalk interferer. We first analyze the eigenstructure of the equalizer in the presence of cyclostationary crosstalk interference. It is shown that the eigenvalues of the equalizer depend upon the folded signal and interferer power spectra, and the cross power spectrum between the signal and the interferer. The expressions of the minimum mean square error (MMSE) and the excess MSE are then obtained by using the equalizer's eigenstructure. Analysis and simulation results indicate that such peculiar equalizer's eigenstructure in the presence of cyclostationary interference results in significantly different initial convergence and steady-state behaviors as compared with the stationary noise case. We also show that the performance of the equalizer varies depending on the relative clock phase of the symbol clocks used by the signal and the crosstalk interferer.