基于AOA的双机无源定位模型及其解算方法

doi:10.3969/j.issn.1001-506X.2020.05.02

Abstract

Abstract:

The angle information usually plays a very important role in the passive positioning algorithms of two-aircraft coordination. Focusing on the dual-aircraft passive positioning problem, a positioning model using azimuth and elevation angle information is proposed, which can eliminate the influence of intermediate variable distance. In the location implementation, an ordinary least squares method, a weighted least squares method, a total least square method and an asymptotic unbiased estimation method are exploited to solve the location problem based on the proposed dual-aircraft positioning model. Comparing with time difference of arrival (TDOA)/angle of arrival (AOA) positioning algorithms, the proposed AOA algorithm requires less observation information, which introduces less observation errors and can improve the final positioning accuracy. The numerical simulation results verify the positioning performance of the four methods and show better performance of positioning accuracy comparing with TDOA/AOA. This paper also compares the positioning accuracy of the four algorithms in dual-aircrafc cooperative observation and positioning under different errors and constraints.

Key words: passive positioning, dual-aircraft coordination, angle of arrival (AOA), least squares estimation, asymptotic unbiased estimation

CLC Number:

TN971.1

Longwen WU, Baoying WANG, Junjie WEI, Shengyang HE, Yaqin ZHAO. AOA based dual-aircraft passive positioning model and its location methods[J]. Systems Engineering and Electronics, 2020, 42(5): 978-986.

Figures/Tables 4

References 32

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解算方法	OLS	WLS	TLS	AUE
瞬时定位角度误差1°	2.931 9	3.022 0	2.945 9	2.967 0
瞬时定位角度误差0.5°	1.482 7	1.481 6	1.468 8	1.444 1
累计时间30 s角度误差1°	0.716 6	0.881 7	0.717 4	0.718 4
60 s内平均误差	0.625 5	1.005 0	0.860 9	0.858 8
仅利用最后30 s	0.735 3	0.886 0	0.726 4	0.722 3

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AOA based dual-aircraft passive positioning model and its location methods

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