基于参考标签可信度和偏差自校正的RFID室内定位算法

为了提高室内定位系统的定位精度,在典型射频识别(RFID)定位系统LANDMARC基础之上,提出了基于参考标签可信度和偏差自校正的RFID室内定位改进算法。该算法引入参考标签辅助定位,先检查每个最近邻参考标签的可信度,舍弃不可信的参考标签；同时，针对最终选定的最近邻参考标签进行定位偏差的自校正,计算出待定位标签的最终估计位置。实验结果表明,与LANDMARC系统相比,改进算法提高了室内定位的精度,适合于室内人和物的定位应用。

Improved RFID indoor positioning algorithm based on reference tags' credibility and deviation correction

After analyzing a classical Radio Frequency Identification (RFID) indoor positioning system named LANDMARC, an improved RFID indoor positioning algorithm based on reference tags' credibility and deviation correction was proposed to enhance the positioning accuracy. This algorithm introduced reference tags to assist in positioning process. After checking the credibility of all nearest neighbour reference tags, a small number of incredible tags were discarded. Then the system did deviation correction of positioning aiming at these final selected nearest neighbor reference tags. At last, the position of the tag to be positioned was calculated. The experimental results show that, compared with the original LANDMARC, this algorithm improves positioning accuracy and is suitable for the application of indoor objects.