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Estimation of basis frequencies for time-varying SIMO channels : a second-order method

journal contribution
posted on 2010-08-01, 00:00 authored by D Peng, Yong XiangYong Xiang, D Huang
The complex exponential basis expansion model (CE-BEM) provides an accurate description for the time-varying (TV) channels encountered in mobile communications. Many blind channel identification and equalization approaches based on the CE-BEM require precise knowledge of the basis frequencies of TV channels. Existing methods for basis frequency estimation usually resort to the higher-order statistics of channel outputs and impose strict constraints on the source signal. In this paper, we propose a novel method to estimate the basis frequencies for blind identification and equalization of time-varying single-input multiple-output (SIMO) finite-impulse-response (FIR) channels. The proposed method exploits only the second-order statistics of channel outputs and does not require strong conditions on the source signal. As a result, it exhibits superior performance to the existing basis frequency estimation methods. The validity of our method is demonstrated by numerical simulations.

History

Journal

IEEE transactions on signal processing

Volume

58

Issue

8

Pagination

4026 - 4039

Publisher

IEEE

Location

Piscataway, N.J.

ISSN

1053-587X

eISSN

1941-0476

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2010, IEEE