一种改进的无线传感网络RSSI测距算法

An Improved RSSI Ranging Algorithm for Wireless Sensor Networks

定位技术是无线传感网络的核心技术。针对室内定位中接收信号强度指示(Received Signal Strength Indication,RSSI)测距算法易受噪声及环境影响等不足,提出一种改进的RSSI测距算法,通过对RSSI值进行均值滤波,降低噪声的干扰,并根据环境状态优化环境因子。仿真实验表明,改进的RSSI测距算法能有效地降低系统的平均定位误差,提高室内定位精度。

Positioning technology is the core technology of wireless sensor network.In view of the shortcomings of Received Signal Strength Indication(RSSI) ranging algorithm in indoor positioning,such as easy to be affected by noise and environment,an improved RSSI ranging algorithm is proposed.By means of mean filtering RSSI values,noise interference is reduced,and environmental factors are optimized according to the environmental state.Simulation results show that the improved RSSI ranging algorithm can effectively reduce the average positioning error of the system and improve the indoor positioning accuracy.