基于RSSI测距的传感器节点质心定位修正算法

Algorithm of Multi-sensors Centroid Localization and Modification Based on RSSI

针对传感器网络节点定位精度问题,研究基于RSSI测距的定位算法,提出多信标节点质心定位修正算法,通过该算法计算得到多组未知节点估计坐标,并在此基础上利用质心定位修正算法计算节点坐标修正值;利用仿真实验,证明基于RSSI测距的传感器节点质心定位算法定位精度比传统质心定位算法定位精度提高13.8%,比RSSI加权质心定位算法提高6.3%。

In order to reduce the error due to the signal attenuation in complex electromagnetic environment, the multi sensor beacons localization algorithm based on RSSI was introduced. Firstly, the unknown sensor node＇s initial location can be done with the weighted centroid algorithm for triangle. Second, the final location information was modified by the modification algorithm. The simulation experiments show that the algorithm of multi-sensors centroid localization and modification based on RSSI has improved the positioning accuracy by 13.8% more than traditional centroid localization algorithm, by 6.3 % more than RSSI-based weighting centroid localization algorithm.