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Estimation of basis frequencies for time-varying SIMO channels : a second-order method
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.
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Journal
IEEE transactions on signal processingVolume
58Issue
8Pagination
4026 - 4039Publisher
IEEELocation
Piscataway, N.J.Publisher DOI
ISSN
1053-587XeISSN
1941-0476Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2010, IEEEUsage metrics
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