嘈杂环境中利用CSI信息的室内轨迹跟踪技术

基于信道状态信息的室内轨迹跟踪技术近几年来备受关注。为了利用现有的商用WiFi设备实现实时的轨迹跟踪,本文采用了一发一收的室内轨迹跟踪系统,主要利用通过信道状态信息计算得到的多维参数包括飞行时间、到达角度、多普勒频移和信道衰减来计算得到相应的位置信息,并且提出了利用环境动态参数来修正定位参数的方法,以达到更为精准的轨迹跟踪效果。实验表明,采用这种方法,定位精度可以达到0.65 m,证明了该方法能精确有效地实现室内轨迹的跟踪定位。

Indoor tracking technology using CSI information in noisy environment

Indoor tracking technology based on Channel State Information received much attention in recent years.In order to realize real-time trajectory tracking by using existing commercial WiFi devices,this paper adopted indoor tracking system with one-transmitter and one-receiver,the multidimensional parameters calculated by Channel State information, including Time of Flight , Arrival of Angle, Doppler Frequency Shift and channel attenuation which were used to calculate the corresponding position information,and it used the environmental dynamic parameters contained in the static path to modify the positioning parameters, so as to achieve a high accurate tracking.Experiments show that the positioning accuracy is up to 0.65m by using with this method, which proves that this method can more accurately and effectively to realize the indoor positioning and tracking.