DocumentCode :
1469119
Title :
Estimation of Basis Frequencies for Time-Varying SIMO Channels: A Second-Order Method
Author :
Peng, Dezhong ; Xiang, Yong ; Huang, Defeng David
Author_Institution :
Machine Intell. Lab., Sichuan Univ., Chengdu, China
Volume :
58
Issue :
8
fYear :
2010
Firstpage :
4026
Lastpage :
4039
Abstract :
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.
Keywords :
channel estimation; frequency estimation; higher order statistics; time-varying channels; blind channel equalization; blind channel identification; complex exponential basis expansion model; finite impulse response channel; frequency estimation; higher-order statistic; mobile communication; time varying SIMO channel; Basis frequency; complex exponential basis expansion; second-order statistics; time-varying SIMO channel;
fLanguage :
English
Journal_Title :
Signal Processing, IEEE Transactions on
Publisher :
ieee
ISSN :
1053-587X
Type :
jour
DOI :
10.1109/TSP.2010.2048104
Filename :
5446398
Link To Document :
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