Abstract: The main objective of this paper, is to review the work already done in the field of blind channel estimation in MIMO- OFDM system. From the higher order statistics to the second order statistics, from statistical model approach to deterministic approach, we outline basic ideas behind several new developments, identifiability conditions and the assumptions required by these approaches, and the algorithm specific characteristics and their performance. This review presents an introductory reference for this currently active research area.

Keywords: Blind channel identification, MIMO-OFDM, statistical approach and deterministic approach.