一种基于RSSI的几何位置定位新算法  

A New Approach to the Geomtry of RSSI Location

作　　者：郑晨[1] 王玫[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《电子器件》2010年第3期348-352,共5页Chinese Journal of Electron Devices

基　　金：国家自然科学基金项目资助"UWB多点协同定位"(60472091);国家自然科学基金项目资助"无线传感器网络脉冲同步技术研究"(60962001);广西区基金资助"传感器网络脉冲无线定位系统研究"(桂科自0640168)

摘　　要：RSSI(接收信号强度指示)测距技术在室内应用环境中,由于多径、绕射、障碍物等因素,无线电传播路径损耗在定位过程中产生的距离误差影响了定位求精的功效,为提高定位精度,通过引入圆的几何力量线——根轴的概念,采用RSSI室内信道模型,提出了一种改进的三边定位算法:根轴定位算法。该算法无需增加额外的硬件开销,容易实现。计算机仿真结果表明,在25 m以内的环境中定位误差可小于3 cm,适合于处理能力和能量有限的无线传感器网络节点。In real measurement environment,due to some factors of multi-path,diffraction,obstacles,etc,propagation losses produced distance errors generated in the positioning process by RSSI（received signal strength indicator）technology which affected the effectiveness of positioning refinement.In order to improve positioning accuracy,through the introduction of the geometric power line-radical axis and indoor model using RSSI was established,an improved algorithm for trilateration of radical axis positioning algorithm was presented.The algorithm requires no additional hardware overhead and achieve easily.Computer simulation results show that the positioning errors can be less than 3 cm within an environment of 25 m,so it is fit for WSN node whose operation abblity and power supply are restricted.

关 键 词：无线传感器网络 定位 根轴 RSSI 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置] TP393[自动化与计算机技术—控制科学与工程]