中文摘要：

针对无线传感器网络中近距离定位精度较低的问题,提出了一种基于接收功率电平（RPL）的免标定三角质心定位算法。该算法使用无线信号参数RPL代替传统接收信号强度指示（RSSI）,应用于测距模型中,与传统三角质心定位模型相结合,从而达到降低测距误差、提高定位精度的目的。通过仿真实验,将基于RPL的三角质心定位算法与基于RSSI的三角质心定位算法进行对比,结果表明：在实验环境下,基于RPL的三角质心定位算法比基于RSSI的三角质心定位算法精度提高了59.02%,定位精度有明显提升。

英文摘要：

Aiming at problem of low precision of close range positioning of wireless sensor networks （ WSNs）, propose a calibration-free triangle centroid localization algorithm based on received power level （RPL）. The algorithm uses argument of radio signals RPL to replace traditional argument received signal strength indication （RSSI） , it is applied in ranging model, combined with traditional triangle centroid localization model, so as to achieve gools of reducing ranging error, improving positioning precision. Through simulation, compare triangle centroid localization algorithm based on RPL with triangle centroid localization algorithm based on RSSI, results show that under the experimental environment, the triangle centroid localization algorithm based on RPL improves precision of 59.02 % than the triangle centroid localization algorithm based on RSSI, positioning precision has been improved significantly.