Blind channel equalization based on second order statistics
Farid, A.A.; Zhi-Quan Luo; Zhi Ding
Acoustics, Speech, and Signal Processing, 2005. Proceedings. (ICASSP apos;05). IEEE International Conference on
Volume 3, Issue , 18-23 March 2005 Page(s): iii/557 - iii/560 Vol. 3
Digital Object Identifier 10.1109/ICASSP.2005.1415770
Summary: In this paper, we present new approaches to blind channel estimation and equalization based on second order statistics (SOS). We first consider the case of minimum phase channels where the equalizer is designed based on the criterion of autocorrelation matching. We cast the problem as a convex optimization program that can be efficiently solved using interior point methods. Then we consider the equalization of single-input multiple-output (SIMO) channels. Due to oversampling, the equivalent channel matrix possesses a particular structure which enables us to estimate the channel based only on the information contained in the covariance matrix at zero delay. Simulation examples are provided to demonstrate the performance advantage of the proposed algorithms compared to existing techniques.
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