Geometry-based non-line-of-sight error mitigation and localization in wireless communications


Recently, positioning services have received considerable attention. The primary source of the positioning error is non-line-of-sight (NLOS) propagation. To address this problem, we propose a novel NLOS mitigation scheme, in which the geometric relationship between a base station and a mobile station is used. This makes it possible to identify range measurements corrupted by NLOS errors, and the mobile station can then estimate its position through line-of-sight (LOS) measurements. Moreover, the threshold of the NLOS detector is derived via a hybrid method using both the analytical derivation and computer simulation, which significantly reduces the difficulty of identifying thresholds. After identifying the NLOS measurements, a two-step weighted-least-squares algorithm is used to obtain the localization, in which both range and angle measurements are considered. The simulation results reveal that the proposed algorithm yields a high identification probability of NLOS measurements, which results in improved localization performance.

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This work was supported by National Natural Science Foundation of China (Grant No. 61471322) and Open Project of Zhejiang Provincial Key Laboratory of Information Processing, Communication and Networking, Zhejiang, China.

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Correspondence to Jingyu Hua.

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Hua, J., Yin, Y., Wang, A. et al. Geometry-based non-line-of-sight error mitigation and localization in wireless communications. Sci. China Inf. Sci. 62, 202301 (2019).

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  • wireless localization
  • non-line-of-sight error
  • geometry
  • cellular network
  • residual