基于时变钟差消除的室内载波相位定位算法

doi:10.11959/j.issn.1000-436x.2021164

通信学报 ›› 2021, Vol. 42 ›› Issue (9): 165-172.doi: 10.11959/j.issn.1000-436x.2021164

基于时变钟差消除的室内载波相位定位算法

范绍帅, 荣志强, 田辉, 李立华, 秦晓琦

北京邮电大学网络与交换技术国家重点实验室，北京 100876

修回日期:2021-08-05 出版日期:2021-09-25 发布日期:2021-09-01
作者简介:范绍帅（1987− ），男，山东烟台人，博士，北京邮电大学讲师，主要研究方向为5G及后5G组网及关键技术、智能信息处理及网络自组织技术、高精度定位技术
荣志强（1997− ），男，天津人，北京邮电大学硕士生，主要研究方向为载波相位定位技术、协作定位技术
田辉（1963− ），女，河南郑州人，博士，北京邮电大学教授、博士生导师，主要研究方向为先进移动通信系统及无线网络技术
李立华（1976− ），女，天津人，博士，北京邮电大学教授，主要研究方向为新一代宽带移动通信理论与关键技术、星地融合接入及传输技术，包括同步、随机接入、大规模MIMO等
秦晓琦（1988− ），女，北京人，博士，北京邮电大学讲师，主要研究方向为下一代无线网络基础理论及性能分析、智能化物联网中基于信息价值的通信、计算资源优化策略与算法设计
基金资助:
国家自然科学基金资助项目(61801044);国家自然科学基金资助项目(61801045)

Indoor carrier phase positioning algorithm based on time-varying clock error elimination

Shaoshuai FAN, Zhiqiang RONG, Hui TIAN, Lihua LI, Xiaoqi QIN

State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China

Revised:2021-08-05 Online:2021-09-25 Published:2021-09-01
Supported by:
The National Natural Science Foundation of China(61801044);The National Natural Science Foundation of China(61801045)

摘要/Abstract

摘要：

针对室内无线环境下传统定位算法定位精度不高以及系统时钟不同步影响定位精度等问题，提出一种基于三差分载波相位测量与到达时间差（TDoA）融合的三维定位算法。考虑到无线接入点之间存在的时变钟差会导致定位精度变低，所提算法结合参考终端测量来消除时变钟差的影响，基于三差分载波相位测量进行相对位置的精确估计，并将其与具有无偏性的差分TDoA定位结果进行融合粗估计。进一步通过泰勒展开方法对载波相位观测方程线性化，并通过解算整周模糊度实现更高精度的定位。仿真结果表明，所提算法可以克服时变钟差对定位性能的影响，并能在短时间内完成整周模糊度解算，最终可实现高精度定位。

关键词: 无线定位, 载波相位, 时钟偏差, 融合定位, 整周模糊度

Abstract:

To solve the problems of low positioning accuracy of traditional positioning algorithm and unsynchronized system clock in indoor wireless environment, a 3D positioning algorithm was proposed based on the fusion of triple-differential carrier phase measurements and time difference of arrival (TDoA) positioning.Considering that the time-varying clock offsets between wireless access points lead to lower positioning accuracy, the measurements from a reference terminal were used to eliminate the influence of time-varying clock offsets.The relative positions were estimated based on triple-differential carrier phase measurements, which were fused with unbiased differential TDoA positioning results to obtain the interim estimated positions.Furthermore, the carrier phase observation equations were linearized by Taylor expansion method, and the high-accuracy positioning was realized by solving the integer ambiguities.Simulation results show that the proposed algorithm eliminates the influence of time-varying clock offsets on positioning performance, and the integer ambiguities are resolved in a short time to achieve high-accuracy positioning.

Key words: wireless positioning, carrier phase, clock offset, fusion positioning, integer ambiguity

中图分类号:

TN92

范绍帅, 荣志强, 田辉, 李立华, 秦晓琦. 基于时变钟差消除的室内载波相位定位算法[J]. 通信学报, 2021, 42(9): 165-172.

Shaoshuai FAN, Zhiqiang RONG, Hui TIAN, Lihua LI, Xiaoqi QIN. Indoor carrier phase positioning algorithm based on time-varying clock error elimination[J]. Journal on Communications, 2021, 42(9): 165-172.

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基于时变钟差消除的室内载波相位定位算法

Indoor carrier phase positioning algorithm based on time-varying clock error elimination

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