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针对MUSIC算法在工程应用中存在的计算量大、快拍需求数多等问题,详细研究了一种单次快拍MUSIC算法。针对这种算法存在的分辨力差、估计偏差大等缺陷,提出了一种新的基于波束空间的单次快拍MUSIC算法,该方法首先利用单次快拍来估计阵列数据的协方差矩阵,再将常规波束形成方法和MUSIC超分辨方法相结合,实现对空间谱的估计。仿真结果表明,这种新方法提高了分辨力,降低了估计偏差,进一步减少了运算量。
Aiming at the problems such as large amount of calculation and large number of snap shots required by MUSIC algorithm in engineering application, a single snapshot MUSIC algorithm is studied in detail. Aiming at the defects such as poor resolving power and large estimation error of this algorithm, this paper proposes a new single snapshot MUSIC algorithm based on beam space. Firstly, the single coherent snapshot is used to estimate the covariance matrix of array data, Then the conventional beamforming method and the MUSIC super-resolution method are combined to realize the estimation of the spatial spectrum. The simulation results show that this new method improves the resolution, reduces the estimation error and further reduces the computational complexity.