电信科学 ›› 2019, Vol. 35 ›› Issue (9): 107-113.doi: 10.11959/j.issn.1000-0801.2019146

• 研究与开发 • 上一篇    下一篇

非视距环境下基于RSS-TOA的定位算法

卢志刚1,李有明1(),贾向红2,常生明1,王晓丽1   

  1. 1 宁波大学信息科学与工程学院,浙江 宁波 315211
    2 中国联合网络通信有限公司,北京 100033
  • 修回日期:2019-04-15 出版日期:2019-09-20 发布日期:2019-09-30
  • 作者简介:卢志刚(1995- ),男,宁波大学信息科学与工程学院硕士生,主要研究方向为无线传感网络定位。|李有明(1963- ),男,宁波大学信息科学与工程学院教授、博士生导师,主要研究方向为宽带通信、电力线通信、协作中继、认知无线电等。|贾向红(1971- ),女,中国联合网络通信有限公司高级工程师,主要研究方向为通信及IT应用。|常生明(1982- ),男,宁波大学信息科学与工程学院博士生,主要研究方向为无线传感网络定位。|王晓丽(1975- ),女,宁波大学信息科学与工程学院讲师、博士生,主要研究方向为多载波通信及应用。
  • 基金资助:
    国家自然科学基金资助项目(61571250);浙江省自然科学基金资助项目(LY18F010010);宁波市自然科学基金资助项目(2015A610121)

RSS-TOA based localization algorithm in non-line-of-sight environment

Zhigang LU1,·ouming LI1(),Xianghong JIA2,Shengming CHANG1,Xiaoli WANG1   

  1. 1 Faculty of Electrical Engineering and Computer Science ,Ningbo University,Ningbo 315211,China
    2 China United Network Communications Co.,Ltd.,Beijing 100033,China
  • Revised:2019-04-15 Online:2019-09-20 Published:2019-09-30
  • Supported by:
    The National Natural Science Foundation of China(61571250);The Natural Science Foundation of Zhejiang Province of China(LY18F010010);The Natural Science Foundation of Ningbo of China(2015A610121)

摘要:

在无线传感器网络定位系统中,尤其是在室内定位中,非视距(NLOS)误差的存在使定位性能急剧下降。为克服非视距传播带来的定位误差,提出了一种针对非视距环境下联合接收信号强度(RSS)和到达时间(TOA)的定位算法。该方法首先通过 RSS和 TOA的测量结果建立关于目标位置的非凸优化问题,然后通过二阶锥松弛理论,将原始的非凸优化问题转换为一种凸优化问题,由此能够快速得到原问题的一个次优解。通过计算机模拟仿真验证,新方法的估计精度更高,性能更好。

关键词: 接收信号强度, 到达时间, 二阶锥松弛, 非视距

Abstract:

The existence of non-line-of-sight (NLOS) error can degrade the positioning performance in wireless sensor network localization system,especially in indoor localization.To overcome the localization error caused by NLOS propagation,a localization algorithm was proposed based on received signal strength (RSS) and time-of-arrival (TOA).Firstly,a non-convex optimization problem was established based on RSS and TOA.Then,the original non-convex optimization problem was transformed into a convex optimization problem through the second-order cone relaxation technique,therefore a sub-optimal solution to the original problem could be obtained efficiently.Finally,computer simulation results show that the proposed method can provide higher estimation accuracy and better performance.

Key words: received signal strength, time-of-arrival, second-order cone relaxation, non-line-of-sight

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