摘要
对RSSI和TDOA测距技术优缺点进行分析,提出了基于(接收信号强度指示(RSSI)和信号到达时间差(TDOA)的混合测距加权定位算法,解决无线传感器网络定位系统中单纯依靠TDOA测距造成信标节点数量不足的问题。该算法根据测距方式的精度差异对测距结果进行加权校正处理,仿真实验表明,通过选择合适的加权值可以大大降低采用RSSI测距方式对定位精度产生的不利影响。
To solve the problem of insufficient beacon nodes caused by the short scope of TDOA range technology,a weighted localization algorithm is presented that combines RSSI and TDOA range technologies.This algorithm includes a weighted correction scheme in which range results is assigned with different weight values in terms of measurement methods.And simulation results show that this correction scheme with proper weight values is able to reduce the RSSI＇s adverse effects on localization results efficiently.
出处
《计算机与数字工程》
2011年第4期25-28,共4页
Computer & Digital Engineering
关键词
无线传感器网络
测距
定位
加权校正
wireless sensor networks
range
localization
weighted correction
