Abstract:

A method for low elevation estimation in the presence of multipath effect and mutual coupling error for multiple input multiple output (MIMO) radar is proposed. Mutual coupling and multipath effect are taken into account for the signal model. Utilizing the characteristics of the mutual coupling matrix in uniform linear arrays, the steering vector can be transformed. Finally, based on the underlying basis for subspace-based method, the low elevation is obtained. More importantly the reflectance and the mutual coupling matrix can also be achieved simultaneously. Additionally, the Cramer-Rao bound (CRB) is derived. The proposed method can estimate these parameters in the presence of multipath effect without any previous calibration information as initialization. Simulation results illustrate the performance of the algorithm and comparison with the CRB.