改进的空间平滑MUSIC算法的DOA估计研究

OA estimation is a key field in array signal processing, among which the MUSIC algorithm is a classic high-resolution algorithm for incoherent sources. However, when dealing with two completely coherent sources, the MUSIC algorithm loses its resolution ability. Therefore, we further studied super-resolution algorithms suitable for coherent sources, especially the spatially smooth MUSIC algorithm.However, the spatial smoothing MUSIC algorithm is limited in all signals due to the reduction of array aperture, and also has the problem of low estimation accuracy. Therefore, an improved spatial smoothing MUSIC algorithm is proposed to solve the above problems. Simulation results show that the improved spatial smoothing MUSIC algorithm performs better.