Abstract:A blind channel estimation method is presented for the Multiple-Input-Multiple-Output (MIMO) CDMA system employing long spreading codes. To estimate channel parameters, a decorrelating matched filter is applied as front-end at the receiver. The matched filter outputs consist of the signal space spanned by the users channel vector and the centers of the sets are extracted by clustering procedure. Then the channel parameters are estimated via the first-order statistics of the filter outputs. The K-mean clustering algorithm is improved in class centers initialization for fast convergence. The proposed method has low computational complexity. Simulation results illustrate the effectiveness of the proposed method and the robustness to channel order overestimation.