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基于RSSI的测距差分修正定位算法
引用本文:任维政,徐连明,邓中亮,王川.基于RSSI的测距差分修正定位算法[J].传感技术学报,2008,21(7).
作者姓名:任维政  徐连明  邓中亮  王川
作者单位:北京邮电大学电子工程学院,北京,100876
基金项目:北京大学数字中国研究院为新研究基金
摘    要:为了抑制RSSI误差对无线传感器节点自身定位精度的影响,以三边定位算法为基础,定义了个体差异差分系数、距离差分系数和距离差分定位方程,把离目标节点最近的信标节点作为参考节点对基于RSSI的测距进行差分修正,并将差分法和质心法相结合提出了一种测距差分修正定位算法。该定位算法无需增加额外硬件开销,容易实现,定位误差可小于2.5m,适合于处理能力和能量有限的无线传感器网络节点。

关 键 词:无线传感器网络  定位  差分  RSSI

Distance Difference Localization Algorithm Based on RSSI for Wireless Sensor Networks
REN Wei-zheng,XU Lian-ming,DENG Zhong-liang,WANG Chuan.Distance Difference Localization Algorithm Based on RSSI for Wireless Sensor Networks[J].Journal of Transduction Technology,2008,21(7).
Authors:REN Wei-zheng  XU Lian-ming  DENG Zhong-liang  WANG Chuan
Affiliation:School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
Abstract:In order to suppress effectively the effects of RSSI error to WSN node localization precision,individual difference coefficient,distance difference coefficient and distance difference localization equation are defined,based on the trilateration localization algorithm.The closest beaconing node to object node as reference node corrects measure distance based on RSSI by difference method.A distance difference correction localization algorithm is put forward through combining difference method and weighted centroid averaging method.This localization algorithm needn't additional hardware spending,easy to be realized,and its location error is less than 2.5m,so it is fit for WSN node whose operation ability and power supply are restricted.
Keywords:WSN  localization  difference  RSSI(Received Signal Strength Indicator)
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