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本文提出了一种新的基于信号时空特征结构的二维DOA估计方法———宽带谱相关时空DOA矩阵方法。该方法利用信号的循环平稳特性实现了对宽带信号的有效处理 ,同时通过空时变换将传统的一维空域处理拓展到了二维空时处理 ,更充分地利用了信号的时域特征 ,从而大大简化了阵列结构 ,提高了算法的性能。理论分析与仿真结果表明 ,该方法既继承了循环平稳方法在谱估计方面的优势 ,又具有原DOA矩阵方法无需二维谱峰搜索和参数配对的特点。
In this paper, a new two-dimensional DOA estimation method based on signal spatio-temporal feature structure is proposed, which is the wide-band spectral correlation space-time DOA matrix method. The method utilizes the cyclostationarity of the signal to realize the effective processing of the wideband signal. At the same time, the traditional one-dimensional space-domain processing is extended to the two-dimensional space-time processing through the space-time transform, and the signal’s time-domain characteristic is utilized more fully, Simplify the structure of the array and improve the performance of the algorithm. Theoretical analysis and simulation results show that this method not only inherits the advantages of cyclic stationary method in spectrum estimation, but also has the characteristics of the original DOA matrix method without two-dimensional peak search and parameter matching.