Semi-blind SIMO flat-fading channel estimation in unknown spatially correlated noise using the EM algorithm

Authors:
A. Dogandzic;Wei Mo;Zhengdao Wang
Affiliations:
Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA;-;-
Venue:
IEEE Transactions on Signal Processing
Year:
2004

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Abstract

We present a maximum likelihood (ML) method for semi-blind estimation of single-input multi-output (SIMO) flat-fading channels in spatially correlated noise having unknown covariance. An expectation-maximization (EM) algorithm is utilized to compute the ML estimates of the channel and spatial noise covariance. We derive the Crame´r-Rao bound (CRB) matrix for the unknown parameters and present a symbol detector that utilizes the EM channel estimates. Numerical simulations demonstrate the performance of the proposed method.