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A Direct Position Determination Method Based on Subspace Orthogonality in Cross-Spectra under Multipath Environments

Authors :
Kehui Zhu
Hang Jiang
Yuchong Huo
Qin Yu
Jianfeng Li
Source :
Sensors, Vol 22, Iss 19, p 7245 (2022)
Publication Year :
2022
Publisher :
MDPI AG, 2022.

Abstract

Without the estimation of the intermediate parameters, the direct position determination (DPD) method can achieve higher localization accuracy than conventional two-step methods. However, multipath environments are still a key problem, and complex high-dimensional matrix operations are required in most DPD methods. In this paper, a time-difference-of-arrival-based (TDOA-based) DPD method is proposed based on the subspace orthogonality in the cross-spectra between the different sensors. Firstly, the cross-spectrum between the segmented received signal and reference signal is calculated and eigenvalue decomposition is performed to obtain the subspaces. Then, the cost functions are constructed by using the orthogonality of subspace. Finally, the location of the radiation source is obtained by searching the superposition of these cost functions in the target area. Compared with other DPD methods, our proposed DPD method leads to better localization accuracy with less complexity. The superiority of this method is verified by both simulated and real measured data when compared to other TDOA and DPD algorithms.

Details

Language :
English
ISSN :
14248220
Volume :
22
Issue :
19
Database :
Directory of Open Access Journals
Journal :
Sensors
Publication Type :
Academic Journal
Accession number :
edsdoj.b1b4199f0342df83977cc460d1cf53
Document Type :
article
Full Text :
https://doi.org/10.3390/s22197245