基于RSSI和LQI的分段距离估计改进算法  

Subsection Distance Estimation Method based on RSSI and LQI

作　　者：臧建魁[1] 卿粼波[1] 何小海[1] 廖亚风[1] 

机构地区：[1]四川大学电子信息学院图像信息研究所,四川成都610064

出　　处：《通信技术》2011年第11期100-102,共3页Communications Technology

摘　　要：针对无线传感器网络(WSN)中单一通过RSSI估计距离的算法易受环境影响产生误差,提出了一种基于RSSI和LQI的分段距离估计改进算法。首先分析了RSSI算法特点,然后在距离估计过程中引入了链路质量,根据预设范围调整定位算法,从而降低RSSI距离估计算法的误差,提高了距离估计精度。实验结果表明,基于RSSI和LQI的分段距离估计改进算法的距离估计精度与原算法相比有了明显提高。Distance estimation method based on RSSI,due to environmental influences,could produce errors,and thus the subsection distance estimation method based on RSSI and LQI is proposed.The method analyzes the characteristics of RSSI,then LQI is introduced in the distance estimation process,and according to the default range,the location method is adjusted.This estimation method could improve the estimation accuracy of trilateral positioning based on the distance.Experimental results show that the distance estimation accuracy by the new method is obviously higher than by the traditional ones.

关 键 词：无线传感器网络 接收信号强度指示 链路质量 距离估计 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]