基于RSSI的室内定位算法优化技术  

Indoor positioning optimization techniques based on RSSI

作　　者：张苍松 郭军[1] 崔娇[1] 尚军[1] 

机构地区：[1]西北大学信息科学与技术学院,西安710127

出　　处：《计算机工程与应用》2015年第3期235-238,259,共5页Computer Engineering and Applications

基　　金：国家科技支撑计划课题项目(No.2013BAK01B02);陕西省教育厅自然科学基金资助项目(No.JD11260)

摘　　要：定位技术在无线传感器网络中有重要的作用,针对基于RSSI的室内定位误差较大这一问题,通过对RSSI测距模型进行分析,提出一种基于RSSI的室内定位算法的优化方案。该方案将整体环境进行分割,对分割后的子区域进行环境参数拟合,同时对参考节点的可靠性通过权值进行衡量,取可靠性最高的三个参考节点完成定位,从而减小定位误差,通过Zigbee模块进行验证分析。实验表明,该改进方案明显提高了室内定位的精度。Localization is very important in Wireless Sensor Network（WSN）. In order to solve the problem of a major error of the indoor positioning based on RSSI, this paper proposes an improved scheme to provide higher localization accuracy by analysing RSSI-based distance estimated model. In this scheme, environmental parameter fitting will be executed in the divided child areas which are segmented from the overall environment, and then the three reference nodes of the highest reliability which is measured by weights are taken to complete the localization. Through the experiment on Zigbee module, it shows that the proposed method can obviously improve the localization accuracy.

关 键 词：无线传感器网络 定位算法 区域分割 权值 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]