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Coherent wide-band signals DOA estimation by the new CTOPS algorithm
Multidimensional Systems and Signal Processing ( IF 2.5 ) Pub Date : 2020-01-08 , DOI: 10.1007/s11045-020-00699-z
Abbas Asadzadeh , Seyed Mohammad Alavi , Mahmood Karimi , Hadi Amiri

Direction of arrival estimation is one of the most important issues in array signals processing. In this paper, a new method is presented for direction estimation of coherent wide-band signals. First of all, signal eigenvalues which have information of the direction of coherent signals, are extracted as primary vectors in each frequency bin. Afterwards, by constructing the innovative matrix H from signal eigenvalues, the de-correlation process is performed and the linear independent vectors of sources are extracted from SVD decomposition. Finally, by choosing transfer matrix, the signal subspace of the reference frequency is transferred to other frequency bins and the direction estimation process is performed by using TOPS algorithm. The proposed method does not need any knowledge of the number of sources and initial estimation of arrival angles. According to the simulation results, the CTOPS new method has a better performance than TOPS method in the presence of correlated sources.

中文翻译:

新CTOPS算法相干宽带信号DOA估计

到达方向估计是阵列信号处理中最重要的问题之一。本文提出了一种新的相干宽带信号方向估计方法。首先,提取具有相干信号方向信息的信号特征值作为每个频率仓中的主向量。然后,通过从信号特征值构建创新矩阵 H,执行去相关过程,并从 SVD 分解中提取源的线性独立向量。最后,通过选择转移矩阵,将参考频率的信号子空间转移到其他频率区间,并使用TOPS算法进行方向估计过程。所提出的方法不需要任何关于源数量和到达角初始估计的知识。
更新日期:2020-01-08
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