基于粒子群优化的RSSI等弧三边定位算法  

RSSI-based equal-arc trilateral localization algorithm based on particle swarm optimization

作　　者：刘旭明 王伟[1] 景强 郭志慧 LIU Xu-ming;WANG Wei;JING Qiang;GUO Zhi-hui(School of Information anti Communication Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学信息与通信工程学院,山西太原030051

出　　处：《传感器与微系统》2018年第8期134-136,共3页Transducer and Microsystem Technologies

基　　金：山西省重点研发计划资助项目(201603D121006-1)

摘　　要：通过分析不同通信距离与接收信号强度指示(RSSI)的变化关系来选择满足定位要求的最佳通信距离。采用基于RSSI的等弧三边形布局,使待测节点运动轨迹始终位于信标节点的最佳通信距离内,以提高定位算法的测量精度。实验结果表明:相比传统的方形布局和三角形布局及改进三角形布局,等弧三边形布局平均定位精度分别提高81%,54%和48%;相对于传统三角形布局,等弧三边形布局面积覆盖率提升23%。提出的定位算法计算简单,无硬件扩展,成本相对较低。By analyzing on relationship between different communication distance and RSSI changes, choose the optimal communication distance which meets the positioning requirements. The RSSI-based equal-arc trilateral layout is used, to ensure that motion tracks of nodes to be test are always kept within the optimal communication distance of beacon nodes, so as to improve measurement precision of localization algorithm. A conclusion is drawn that equal-arc trilateral layout than the traditional square layout, traditional triangle layout and the improved triangle layout,the average positioning precision is increased by 81% ,54 % ,48 % , respectively. Compared with the traditional triangle layout, equal-arc layout area coverage rate is increased by 23 %. This algorithm is simple calculation and no extended hardware are required and the cost is relatively low.

关 键 词：室内定位 接收信号强度指示 信标节点 等弧三边形 

分 类 号：TN919[电子电信—通信与信息系统]