物联网学报 ›› 2018, Vol. 2 ›› Issue (4): 68-77.doi: 10.11959/j.issn.2096-3750.2018.00077

• 理论与技术 • 上一篇    下一篇

复杂室内环境下基于CSI的定位方法

党小超1,2,司雄1,郝占军1,2,黄亚宁1,黑毅力1   

  1. 1 西北师范大学计算机科学与工程学院,甘肃 兰州 730070
    2 甘肃省物联网工程研究中心,甘肃 兰州 730070
  • 修回日期:2018-10-29 出版日期:2018-12-01 发布日期:2019-01-03
  • 作者简介:党小超(1963-),男,西北师范大学教授,主要研究方向为物联网、传感器网络、无线感知技术等。|司雄(1993-),男,西北师范大学硕士生,主要研究方向为无线定位技术。|郝占军(1979-),男,博士,西北师范大学副教授,主要研究方向为位置服务和无线定位技术。|黄亚宁(1994-),女,西北师范大学硕士生,主要研究方向为物联网和智能感知。|黑毅力(1991-),男,西北师范大学硕士生,主要研究方向为无线定位技术。
  • 基金资助:
    国家自然科学基金资助项目(61762079);国家自然科学基金资助项目(61662070);甘肃省科技重点研发项目(1604FKCA097);甘肃省科技重点研发项目(17YF1GA015)

Indoor localization method based on CSI in complex environment

Xiaochao DANG1,2,Xiong SI1,Zhanjun HAO1,2,Yaning HUANG1,Yili HEI1   

  1. 1 College of Computer Science and Engineering,Northwest Normal University,Lanzhou 730070,China
    2 Gansu Province Internet of Things Engineering Research Center,Lanzhou 730070,China
  • Revised:2018-10-29 Online:2018-12-01 Published:2019-01-03
  • Supported by:
    The National Natural Science Foundation of China(61762079);The National Natural Science Foundation of China(61662070);Key Science and Technology Development Program of Gansu Province(1604FKCA097);Key Science and Technology Development Program of Gansu Province(17YF1GA015)

摘要:

信道状态信息(CSI,channel state information)可以提供更详细具体的子载波信息,在室内定位技术领域引起研究人员的关注和重视。针对传统室内定位方法在复杂室内环境下准确性及稳定性方面的不足,提出了一种可以用于复杂室内环境的定位方法,命名为 ComLoc。主要解决了复杂环境中无线信号多径效应和噪声干扰对定位精度的影响,并讨论了CSI信号存在的误差,分析CSI相位信息对室内环境的敏感性,提出可信载波链路的思想,通过相位差选取可靠、稳定的链路信号来减少对位置的误判,同时对CSI的相位误差进行校准,提取信号变化的特征。实验结果分析表明,ComLoc在室内复杂环境下的定位结果具有高效性和有效性。

关键词: 复杂室内环境, 室内定位, 信道状态信息, 相位误差校准, 特征指纹

Abstract:

Channel state information can provide more detailed sub-carrier information,which attracts the attention of researchers in indoor localization technology.In view of the shortcomings of the traditional indoor location method in the accuracy and stability of the complex indoor environment,an indoor localization method named ComLoc was proposed which could be applied to complex indoor environment,solved the influence of the multipath effect and noise interference on the positioning precision.The error of CSI signal was discussed,the sensitivity of CSI phase information to indoor environment was analyzed and the idea of trusted carrier link was proposed.By selecting reliable and stable link signal by phase difference,the misjudgment of position could be reduced.Based on many numerous experiments,the phase error of CSI was calibrated,and the characteristics of signal variation were extracted.The experimental results show that ComLoc is effective and efficient in the complex indoor environment.

Key words: complex indoor environment, indoor localization, channel state information, phase calibration

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