基于特征向量空间聚焦的宽带DOA估计方法

doi:10.12305/j.issn.1001-506X.2021.02.02

Abstract

Abstract:

In order to solve the problem of the direction of arrival (DOA) estimation error caused by the angle of incidence estimation in the traditional DOA estimation method of broadband array signal and its application in the environment of multipath effect, a DOA estimation method of broadband array signals based on eigenvector space focusing is proposed. Firstly, considering the influence of multipath interference on the DOA estimation algorithm, the autocorrelation matrix of the received signal is smoothed. Then, based on the transition of eigenvector space of the smooth autocorrelation matrix, the focusing matrix is constructed and its perfect focusing property is proved. Theoretical analysis and simulation results show that the method does not need to estimate the angle value of the incident signal, effectively avoids the focusing error, has low complexity, and improves the estimation accuracy and efficiency.

Key words: direction of arrival (DOA) estimation, broadband array, multipath effect, eigenvector space, perfect focus

CLC Number:

TN911

Silei CAO, Weigui ZENG, Huiqi XU. Broadband DOA estimation method based on eigenvector space focusing[J]. Systems Engineering and Electronics, 2021, 43(2): 294-299.

Figures/Tables 7

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References 25

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算法	角距/(°)
算法	2	5	10	20
DEESF	4.15	7.71	13.55	21.84
TCT	0.82	1.46	1.94	2.78
文献[18]	2.38	4.22	6.90	9.39
DCF	2.24	3.02	5.17	7.08

算法	信源数
算法	2	3
DEESF	14.2	15.1
TCT	22	22.5
文献[18]	23.1	24.0
DCF	162	167.1

编号	方位/(°)	射频下限	射频上限	脉冲重复周期下限
1	-2.20	7.12	14.05	568.00
2	7.54	6.89	13.45	568.00

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Broadband DOA estimation method based on eigenvector space focusing

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