基于虚拟时间反转理论的方位角估计新算法

Because the calculation amount of subspace direction-of-arrival(DOA) estimation algorithms is large and the high request for actual system, a new DOA estimation method based on time reversal (TR) theory, namely virtual TR(VTR) DOA estimation algorithm is proposed, and it is applied to estimating the azimuth angle of far field narrowband signal source. In order to demonstrate the feasibility and accuracy of this algorithm, the direction finding model is built and computer simulations are carried out. The results show that, compared with MUSIC and ESPRIT method, this algorithm has a similar accuracy in large sample and its RMSE is always smaller than 1 , which is much less than phase comparison method.