测控技术2017，Vol.36Issue(10)：28-32,5.
基于RSSI测距的WiFi室内定位算法研究
Research on WiFi Indoor Positioning Algorithm Based on RSSI Ranging
摘要
Abstract
A weighted centroid positioning algorithm to eliminate the influence of altitude is proposed considering the influence of AP(access point) deployment height on positioning accuracy.Firstly,the RSSI signal is collected and processed by Gaussian fitting and Kalman filtering,and the distance between the terminal and the AP is obtained according to the indoor signal propagation model.Then,the vertical distance is eliminated by the geometric method,and the plane distance between the AP and the terminal is obtained.Finally,the position coordinate is calculated by the weighted centroid positioning algorithm to eliminate the influence of altitude.For a multi-storey building,a floor recognition method is proposed,which combines the 2D planar positioning to construct a near-3D indoor positioning algorithm.In the laboratory building,the floor is recognised with the above methods and the recognition rate is 100％.In the large-scale classroom for positioning experiments,the results show that the improved algorithm has a certain increase on the accuracy and stability compared with the traditional positioning algorithm.关键词
接收的信号强度指示/无线访问接入点/室内定位/高度Key words
RSSI/AP/indoor positioning/altitude分类
信息技术与安全科学引用本文复制引用
罗宇锋,王鹏飞,陈彦峰..基于RSSI测距的WiFi室内定位算法研究[J].测控技术,2017,36(10):28-32,5.基金项目
河南理工大学博士基金(72515/168) （72515/168）
