摘要
针对射频定位LANDMARC算法精度差的问题,提出了一种改进算法,依据最邻近参考标签到阅读器的距离及其接收的信号强度指示RSSI(received signal strength indicator),通过拉格朗日插值法,得到阅读器到待定位标签的距离,并通过三边定位求得待定位标签的坐标.通过软件仿真分析改进后的算法比原算法的定位精确度提高了65%左右,最小误差由原算法的0.39 m降低为0.015 3 m.实验数据表明,该改进算法在室内定位系统中具有较高的应用价值和广阔的应用前景.
The location accuracy is affected by different factors with the LANDMARC algorithm for Radio fre- quency identification （RFID）. This study proposes an improved algorithm to calculate the coordinates of tracking tags. First, according to the distance from the nearest reference tag to the reader and its Received Signal Strength Indicator （ RSSI）, the distance from the reader to the tracking tags can be calculated by using of Lagrange interpo- lation method. Then, the coordinates of tracking tags could be obtained using trilateral position algorithm. The re- sults show that the accuracy of the proposed scheme increases by 65% compared with the original one and the mini- mum error deceases from 0. 39 m to 0. 0153 m. Based on experimental analysis, this scheme is very competitive in the indoor location sensing systems.
出处
《哈尔滨理工大学学报》
CAS
北大核心
2016年第5期86-89,共4页
Journal of Harbin University of Science and Technology
基金
山东省高等学校科技计划项目(J16LB59)
