空间任意阵的多宽带信源定位算法性能研究

针对宽带信号非平稳特性，以及常用宽带DOA估计算法要求信源个数是已知的情况，提出一种新的基于空间任意阵的非平稳信号DOA估计算法。首先，通过短时傅里叶变换将信号转为频域表示，然后构造阵列频域数据模型，最后利用短时功率谱矩阵的联合对角化特性实现宽带信号的波达方向估计。本文对提出的算法进行了理论分析，并在常见阵型（如线阵、十字阵）上进行了仿真和性能分析，仿真结果表明该算法可高分辨率地估计出DOA，并且估计误差小。相对于已有的MUSIC谱估计方法，该算法无需进行信源个数估计，更具实用性。 

Performance analysis of multiple wideband sources localization for arbitrary array

Aimed at the feature of wideband signals which were non-stationary and the number of source is known for the common wideband DOA（Direction-of-Arrival）estimation algorithm, a new DOA estimation algorithm of non-stationary signals for spatial arbitrary array was proposed. Firstly, we turn the signal into frequency domain by short-time Fourier transform(STFT), and then construct array data model in frequency domain . finally, by using joint diagonalization feature of the short-time power spectrum matrix to realize wideband signal DOA estimation. In this paper, the proposed algorithm are analyzed in theory, and simulated in the common format (such as linear array,cross array) and analyzed the performance of the algorithm, the results show that this algorithm can estimate the DOA in high resolution, and the estimate error is small. Compared with the existing MUSIC spectrum estimation method, the proposed method has no need for the source number, which means more practical.