A second-order blind equalization method robust to ill-conditioned SIMO FIR channels

Xiang,Y, Yang,L, Peng,D and Xie,S 2014, A second-order blind equalization method robust to ill-conditioned SIMO FIR channels, Digital Signal Processing : A Review Journal, vol. 32, pp. 57-66, doi: 10.1016/j.dsp.2014.05.015.

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Title A second-order blind equalization method robust to ill-conditioned SIMO FIR channels
Author(s) Xiang,YORCID iD for Xiang,Y orcid.org/0000-0003-3545-7863
Journal name Digital Signal Processing : A Review Journal
Volume number 32
Start page 57
End page 66
Total pages 10
Publisher Elsevier
Place of publication Waltham, MA.
Publication date 2014-09
ISSN 1051-2004
Keyword(s) Blind equalization
Blind identification
Second-order statistics
SIMO FIR channel
Summary This paper deals with blind equalization of single-input-multiple-output (SIMO) finite-impulse-response (FIR) channels driven by i.i.d. signal, by exploiting the second-order statistics (SOS) of the channel outputs. Usually, SOS-based blind equalization is carried out via two stages. In Stage 1, the SIMO FIR channel is estimated using a blind identification method, such as the recently developed truncated transfer matrix (TTM) method. In Stage 2, an equalizer is derived from the estimate of the channel to recover the source signal. However, this type of two-stage approach does not give satisfactory blind equalization result if the channel is ill-conditioned, which is often encountered in practical applications. In this paper, we first show that the TTM method does not work in some situations. Then, we propose a novel SOS-based blind equalization method which can directly estimate the equalizer without knowing the channel impulse responses. The proposed method can obtain the desired equalizer even in the case that the channel is ill-conditioned. The performance of our method is illustrated by numerical simulations and compared with four benchmark methods. © 2014 Elsevier Inc.
Language eng
DOI 10.1016/j.dsp.2014.05.015
Field of Research 080199 Artificial Intelligence and Image Processing not elsewhere classified
Socio Economic Objective 861799 Communication Equipment not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Grant ID DP110102076
Copyright notice ©2014, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30068123

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