基于 RSSI 测距的改进加权质心定位算法

摘要

Aiming at the error existing in triangular weighted centroid positioning algorithm based on RSSI ( Received Signal Strength Indication) ranging, an improved weighted algorithm is put forward in this paper.The sum of recipro-cal of distance between nodes instead of the reciprocal of sum of distance has been taken as the weighted value.To make full use of the node information, the algorithm has been corrected according to the weighted factors.The simula-tion results verify the effectiveness of the proposed algorithm and show that the improved weighted centroid positioning algorithm can provide an additional maximum precision gain of 50%.%基于RSSI（Received Signal Strength Indication）的三角形加权质心定位算法在测距和定位中存在较大误差，针对这一缺点提出一种改进的加权算法。在该算法中采用节点距离倒数之和代替距离和的倒数作为权值，并且根据节点距离给出加权因子作为修正，以充分利用节点信息。仿真结果验证了该算法的有效性，与原有定位算法比较其定位精度得到提升，最高可达50％。