A blind MIMO channel estimation method robust to order overestimation

Authors:
Yonghong Zeng;Tung Sang Ng
Affiliations:
Department of Electrical and Electronic Engineering, The University of Hong Kong, Room 515, CYC Building, Hong Kong City, Hong Kong;Department of Electrical and Electronic Engineering, The University of Hong Kong, Room 515, CYC Building, Hong Kong City, Hong Kong
Venue:
Signal Processing - Special issue on independent components analysis and beyond
Year:
2004

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Abstract

A new second-order statistics (SOS)-based blind algorithm for MIMO channel estimation is proposed. It can give estimations of all channel impulse responses subject to a scalar matrix ambiguity which is intrinsic to all SOS-based blind methods. As a generalization of the blind identification algorithm for SIMO system in Gazzah et al. (IEEE Trans. Signal Process. 50(6) (2002)1449), this method is truly robust to channel order overestimation, i.e., it can accurately estimate the channels when only upper bounds for all MIMO channel orders are known.