一种利用历史数据构造虚拟标签的定位算法

摘要

在RFID定位算法中,利用接收信号强度统计模型进行直接定位的精确度不高,而利用实际参考标签定位存在信号易碰撞、外出部署不便等问题,因此提出一种基于虚拟标签的RFID定位算法VIREH以克服以上缺点.该算法利用历史数据构建虚拟参考标签,然后利用虚拟参考标签代替实际参考标签进行定位.依据VIREH算法,开发基于Android移动设备的RFID定位系统,在系统中使用VIREH算法进行定位,对定位误差进行了统计以测试算法性能.测试结果表明,VIREH算法的定位精度较直接定位有显著提高,较使用实际参考标签没有明显降低,有助于提高RFID定位精度.%In the RFID location algorithm, using the statistical model of received signal strength for directly positioning is not accurate. And the way of using reference tag leads to signal easily collides, inconvenient for out going. So this paper proposed a new approach based on virtual tag RFID positioning algorithm called VIREH to overcome the above disadvantages. With the help of historical data,it constructed virtual reference tags constructed, and then used the virtual tags, instead of actual reference tags, for positioning. According to the VIREH algorithm, it developed a RFID location system based on Android mobile devices, used the VIREH algorithm in the system and perform a location test. The test result shows that the VIREH algorithm' s accuracy is better than directly algorithm,and compare with using actual reference tag, the VIREH algorithm does not significantly decrease. The algorithm can improve the positional accuracy.