Angle of arrival localization in wireless sensor networks with inaccurate anchor positions

Qi Wang; Guang Hu; Fei Li

doi:10.1117/12.2671085

28 April 2023 Angle of arrival localization in wireless sensor networks with inaccurate anchor positions

Qi Wang, Guang Hu, Fei Li

Proceedings Volume 12610, Third International Conference on Artificial Intelligence and Computer Engineering (ICAICE 2022); 126104H (2023) https://doi.org/10.1117/12.2671085
Event: Third International Conference on Artificial Intelligence and Computer Engineering (ICAICE 2022), 2022, Wuhan, China

Abstract

Angle of arrival-based localization has been widely applied in wireless sensor network due to its easy access of measurements and simple system structure. In previous work, the positions of anchor nodes are generally assumed precisely known, which is an important condition in addition to the angle of arrival measurements. However, in practice, anchor positions are obtained by global positioning system or other localization methods, which inevitably suffer from errors. These errors, leading to inaccurate anchor positions, have heavy impact on the localization result. Although there are a few studies on the errors of anchor position in wireless localization, they mainly focus on range-based measurements. In this paper, we study angle of arrival-based localization with inaccurate anchor positions. Stemming from the maximum likelihood estimation, a novel semidefinite programming method is proposed by using tight approximation and proper relaxation. Numerical examples demonstrate that the proposed method provides much better performance in terms of localization accuracy, compared to some existing methods.

Citation Download Citation

Qi Wang, Guang Hu, and Fei Li "Angle of arrival localization in wireless sensor networks with inaccurate anchor positions", Proc. SPIE 12610, Third International Conference on Artificial Intelligence and Computer Engineering (ICAICE 2022), 126104H (28 April 2023); https://doi.org/10.1117/12.2671085

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KEYWORDS

Sensor networks

Satellite navigation systems

Received signal strength

Simulations

Sensors

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