Real-Time DOA Estimation Using Weighted-OMP Method for 2D-MIMO Radar

This paper proposes a two-step optimization method to suppress the sidelobe levels of a two-dimensional multiple input multiple output (MIMO) radar array, given the aperture size and number of channels. First, a 2-D array is optimized to minimize the sidelobe. Then, successive optimization of the channel weights is performed for additional sidelobe suppression by applying a genetic algorithm to the weighted array pattern and then combining it with orthogonal matching pursuit (OMP) for precise angle estimation. The proposed method lowers the sidelobe level by 0.65 dB through the weights, and the root mean square error (RMSE) values decreased according to the angle estimate.