基于虚拟参考标签的RFID定位系统构建方法

摘要

As current RFID positioning system can only provide a single location based servcie and low localization accuracy for interferring each other in an area where deploying a large number of RFID devices,the paper proposed a RFID positioning system construction method which is using classical signal propagation model to construct a virtual reference tags in position area,and then designed a mobile object positioning menthod based on virtual reference tags space. The experiment results show that the method may enhance positiong accuracy and overcome the interference problems caused by deploying a lot of reference tags and reader,positioning accuracy in the central region to reach 0. 31m～l. 65m,between the error in the external region between 1.48m～3. 72m.%针对现有RFID定位系统在位置服务单一、部署大量RFID设备相互间产生信号干扰而影响定位精度等方面的不足,利用经典信号传播模型在定位区域内构造虚拟参考标签空间,进而构建了一种基于虚拟参考标签空间的移动对象定位方法.实际测试表明,本系统具有较高的定位精度,可以有效克服部署大量参考标签及定位读写器引起的设备干扰问题,定位精度在中心区域达到0.31m～1.65m,在外国区域误差为1.48m～3.72m.