Low-complexity 2D parameter estimation of coherently distributed noncircular signals using modified propagator

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• 作者：Xuemin Yang ; Zhi Zheng ; Chi Chung Ko…
• 关键词：Modified propagator ; Coherently distributed source ; Noncircular signals ; 2D parameter estimation ; Central elevation DOA ; Central azimuth DOA
• 刊名：Multidimensional Systems and Signal Processing
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：28
• 期：2
• 页码：407-426
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Circuits and Systems; Electrical Engineering; Signal,Image and Speech Processing; Artificial Intelligence (incl. Robotics);
• 出版者：Springer US
• ISSN：1573-0824
• 卷排序：28

文摘

In this paper, a new algorithm is proposed for two-dimensional parameter estimation of coherently distributed noncircular signals. Based on the special sensor array geometry of L-shaped uniform linear arrays, 2D angular parameters are obtained independently by using the modified propagator method. Specifically, two selection matrices are employed to obtain rotation invariance matrices under considering signal noncircularity. By making use of the rotation invariance matrices, we then obtain the central elevation and azimuth direction-of-arrivals, respectively. After that, the pair-matching of them is accomplished by searching the minimums of a cost function of the estimated 2D angular parameters. Finally, numerical results to testify the effectiveness of the proposed algorithm are provided. It is also shown that the proposed algorithm performs well in a wide signal-to-noise ratio range.