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节点自身定位是无线传感器网络目标定位的基础。无线传感器网络节点定位算法包括基于距离和距离无关两类。其中基于RSSI的定位算法由于实现简单而被广泛使用,但RSSI方法的测距误差较大,从而影响了节点定位精度。提出了一种基于RSSI的无线传感器网络距离修正定位算法。该算法通过RSSI测距,计算近似质心的位置,以此为参考点进行距离修正,然后确定节点的位置。仿真结果表明该算法可以提高节点定位精度。
The localization of the node itself is the basis of the target localization of the wireless sensor network. Wireless sensor network node localization algorithm includes two categories based on distance and distance. The RSSI-based localization algorithm is widely used because of its simple implementation. However, the RSSI method has a large ranging error and affects the positioning accuracy of the node. A RSSI-based distance correction and location algorithm for wireless sensor network is proposed. The algorithm calculates the approximate centroid position by RSSI distance measurement, and uses it as a reference point for distance correction, and then determines the position of the node. Simulation results show that the algorithm can improve the positioning accuracy of nodes.