标题：
DOA estimation of noncircular signals for coprime linear array via locally reduced-dimensional Capon
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所属单位：
电子信息工程学院
发表刊物：
INTERNATIONAL JOURNAL OF ELECTRONICS
关键字：
DOA estimation coprime linear array noncircular signals Capon locally spectral peak search
摘要：
We investigate the issue of direction of arrival (DOA) estimation of noncircular signals for coprime linear array (CLA). The noncircular property enhances the degree of freedom and improves angle estimation performance, but it leads to a more complex angle ambiguity problem. To eliminate ambiguity, we theoretically prove that the actual DOAs of noncircular signals can be uniquely estimated by finding the coincide results from the two decomposed subarrays based on the coprimeness. We propose a locally reduced-dimensional (RD) Capon algorithm for DOA estimation of noncircular signals for CLA. The RD processing is used in the proposed algorithm to avoid two dimensional (2D) spectral peak search, and coprimeness is employed to avoid the global spectral peak search. The proposed algorithm requires one-dimensional locally spectral peak search, and it has very low computational complexity. Furthermore, the proposed algorithm needs no prior knowledge of the number of sources. We also derive the Cramer-Rao bound of DOA estimation of noncircular signals in CLA. Numerical simulation results demonstrate the effectiveness and superiority of the algorithm.
ISSN号：
0020-7217
是否译文：
否
发表时间：
2018-01-01
合写作者：
张小飞
通讯作者：
翟会
发表时间：
2018-01-01
学位：工学硕士学位
职称：工程师
所在单位：公共实验教学部