Azimuth/elevation angle estimation via TST-ESPRIT technique

In this paper, a based on TST-ESPRIT algorithm with low complexity yet high accuracy is proposed of jointly estimate azimuth and elevation of directions of plane waves of impinging on rectangular planar array (RPA). This method provides estimates of the signal 2-D DOA based only on eigendecomposition and no searching over the parameter space is necessary. It is realized that the incoming rays are grouped, isolated and estimated by some one-dimensional (1-D) ESPRIT. In contrast to the previous methods estimating the 2-D angle of signal waves, the proposed algorithm has lower computational complexity and higher accuracy, furthermore the pairing of the azimuth and elevation is automatically determined. Finally some computer simulations confirm the validity of the proposed method.