基于RFID的虚拟标签算法研究与改进

Research and improvement of virtual tag algorithm based on RFID

针对室内定位算法VIRE的定位精度,特别是邻近边界目标的定位精度较低的问题,以RFID标签定位为研究基础,从改变VIRE算法中虚拟标签的插值方式和在边界上加入虚拟标签两个方面进行研究和改进。使用拉格朗日插值代替VIRE算法中的线性插值方式,使虚拟标签的数据更加接近实际环境值;在边界上加入虚拟参考标签能增加已知标签数,防止在计算待定位标签坐标时引入误差标签。实验结果表明,标签定位精度有了明显提高,整体能提高了35%,邻近边界标签定位精度提高较大,可达到50%以上。

Aiming at the problem of low accuracy of the VIRE indoor positioning algorithm,especially on the object nearby the boundary,based on the RFID study,we improve the algorithm by joining the virtual labels on the boundary and changing the way of interpolation virtual labels based on the label positioning.Lagrange interpolation method instead of the linear interpolation method can make the virtual tag data closer to the actual environment,and adding boundary virtual reference tags can increase the known labels and prevent drawing error labels when calculating a tag coordinate.Experiments show that the label positioning accuracy has been improved by 35％ in the whole and labels close to the boundary by over 50％,which is very significant.