Estima ciega de canal en sistemas MIMO-OSTBC basada en Correlation Matching

Abstract

In this paper, a new technique for blind channel estimation of multiple-input multiple-output (MIMO) channels under orthogonal space-time block coded (OSTBC) transmissions is proposed. The technique is based on the Correlation Matching criterion and exploits the special structure of OSTBC codes to obtain closed-form channel estimates. The proposed method can be reformulated as a principal component analysis (PCA) problem, which permits a straightforward derivation of computationally efficient batch and adaptive algorithms. Although derived in a different way, the technique generalizes previously proposed methods, establishing a parameter selection criterion which resembles the matched filter. Finally, the performance of the proposed algorithms is evaluated by means of some simulation examples.