基于 RSSI 的无线传感器网络节点定位算法研究

节点位置信息是无线传感器网络应用的基础。基于RSSI（Receive Signal Strength Indicator）的测距技术因其低成本和低复杂度的优点而被广泛用于无线传感器网络的定位技术中。介绍了RSSI信号传输模型，在介绍无线传感器网络定位基本原理的基础上，分析了影响定位精度的因素。综述了近几年提出的无线传感器网络中基于RSSI的节点定位算法及其改进算法，现有基于RSSI定位算法的改进算法主要从测距精度改进、定位精度改进或误差修正改进等方面进行。最后，指出了基于RSSI的无线传感器网络节点定位算法的不足，并进行展望。

RSSI-based Node Self-Localization Algorithm in Wireless Sensor Network

Node position information is very important for the application of wireless sensor networks （WSNs）. RSSI （Receive Signal Strength Indicator） -based node self-localization is extensively used due to its advantages in terms of low-cost and low-complexity. Based on the principles of wireless sensor networks localization algorithms, the factors that affect the localization accuracy are investigated. Meanwhile, RSSI-based localization techniques and the improved algorithms in wireless sensor networks are analyzed and summarized. Specifically, the RSSI-based localization algorithms are improved from the aspects of distance estimation, localization accuracy and error amendment. Moreover, the open issues are proposed and concluded.