Influence analysis of atmospheric refraction on elevation-constrained TDOA source localization error and its correction

被引：0
|
作者：
Zhang S. [1 ]
Guo F. [1 ]
Zhang M. [1 ]
Li X. [1 ]
机构：
[1] College of Electronic science and Technology, National University of Defense Technology, Changsha
来源：
Xi Tong Gong Cheng Yu Dian Zi Ji Shu/Systems Engineering and Electronics | 2020年 / 42卷 / 03期
关键词：
Atmospheric refraction; Elevation constraint; Error; Iteration; Particle swarm optimization (PSO);
D O I：
10.3969/j.issn.1001-506X.2020.03.003
中图分类号：
学科分类号：
摘要：
Due to the inhomogeneity of the atmosphere, radio waves are subjected to refraction during the propagation process, which reduces its propagation speed and bends the propagation path. If this refraction effect is not taken into account when the source is localized through conventional multi-station time difference of arrival (TDOA)-based methods, a large localization error will occur. In this paper, the influence of atmospheric refraction on the TDOA localization error under the known elevation constraint is analyzed. It is proved that the iterative correction method cannot achieve the optimum under this elevation constraint (the constraint conditions are redundancy conditions). Consequently, a new atmospheric refraction correction method is proposed where iterative methods are applied to obtain initial solutions, which are further refined by improved particle swarm optimization (PSO) methods. The effectiveness of the proposed method is validated through simulation results and analyses. © 2020, Editorial Office of Systems Engineering and Electronics. All right reserved.
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页码：521 / 527
页数：6
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