Robust DOA estimation in MIMO radar with transmitting uncertainties

This paper is addressed to the problem of direction-of-arrival (DOA) estimation in multi-input multi-output (MIMO) radar. The single carrier and the multi carrier MIMO radars are considered. We introduce a special MIMO radar model with uncertainties due to uncalibrated transmitting array and diversity of radar cross section on different carriers. We use two DOA estimation techniques with robustness to model uncertainties. The first method is the subspace rank reduction (RARE) algorithm and the second method is the robust Capon algorithm. In multicarrier case, we propose waveform interpolation preprocessing which eliminates the signal decorrelation on the different subcarriers caused by Doppler effect. Effectiveness of the proposed techniques are confirmed by simulation results.