摘要
针对RSSI测距定位技术在室内环境中受到的随机干扰大,干扰变化情况不确定,定位结果误差较大的问题,提出了一种基于无线传感器网络节点相似度的室内定位算法。首先通过无线传感器网络的连通特性确定位于网络盲节点周围的几个信标节点,利用数据拟合的方法确定节点工作电压对RSSI距离测量的影响,然后根据拟合结果对不同工作电压下测得的RSSI值进行修正,利用修正后得到的RSSI值计算得到网络节点之间的相似度值,并利用该相似度值作为距离测量和定位结果的自校正系数,对定位结果进行修正,从而获得精度较高的定位效果。实验结果表明该定位算法具有较高的定位精度。
In view of RSSI location technology deeply influenced by random disturbance that bring great errors to the results of measurement, An indoor location algorithm based on the wireless network node similarity is presented. It will confirm some beacon nodes which around the aim node by the connection characteristic of wireless network and make sure the influence of the measuring result that cased by different node voltages by the method of data fitting. Then according to the result of fitting correct the value of RSSI which measured with node under different voltages. Using the modified value of RSSI calculate value of the similarity between the beacon node and aim node and take the value of similarity as the correction coefficient to correct the result of location. The result of experiment show that this algorithm has good performance.
出处
《控制工程》
CSCD
北大核心
2012年第1期106-109,共4页
Control Engineering of China
基金
重庆市自然科学基金项目(CSTC2009BB3209)
