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

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2019,（10）
• 页码范围: 145-159
• 页数: 15页
• 语种: 英文

摘要

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.