Ranging Error Correction Based on a Prior Error Model

• 作 者: Xiaofei Wang Hongkun He Yan Xu Yang Lei
• 机 构: School of Electronics and Information, Northwestern Polytechnical University, Xi’an 710072, China
• 出 处: 中国通信（英文版）
• 发表日期: 2018年3期
• 关键词: time of arrival (TOA) TOA rang-ing error model (TREM) ranging error cor-rection

Wireless technology provides accu-rate positioning in indoor environments using time of arrival (TOA) based ranging tech-niques. However, the positioning accuracy is degraded due to the ranging errors caused by multipath and non-line-of-sight (NLOS) prop-agation. In this paper, a ranging error correc-tion method is proposed to improve position-ing performance. A TOA ranging error model (TREM) is built to provide the prior infor-mation for ranging error correction first. The mean value of TREM within a certain interval is used as the ranging error correction value (RECV). As the RECV may be unreasonable sometimes, we adjust it according to the actual positioning situation and then exploit the final RECV to correct ranging data. The experi-mental results show that the proposed method could well reduce ranging errors and the po-sitioning performance is obviously improved when using corrected ranging data.