一种基于二维相控阵天线的RFID定位方法  

An RFID Tag Localization Based on Phased Array Antenna

作　　者：梁笑轩 黄樟钦 邱兰馨[1,2,3] LIANG Xiao-xuan;HUANG Zhang-qin;QIU Lan-xin(Beijing Advanced Innovation Center for Future Internet Technology,Beijing University of Technology,Beijing 100124,China;Beijing Engineering Research Center for IoT Software and Systems,Beijing University of Technology,Beijing 100124,China;State Grid Zhejiang Electric Power Company Information&Telecommunication Branch,Hangzhou,Zhejiang 310000,China)

机构地区：[1]北京工业大学北京未来网络科技高精尖创新中心,北京100124 [2]北京工业大学北京市物联网软件与系统工程技术研究中心,北京100124 [3]国网浙江省电力公司信息通信分公司,浙江杭州310000

出　　处：《电子学报》2018年第4期911-917,共7页Acta Electronica Sinica

基　　金：北京市自然科学基金(No.4122010);国家自然科学基金(No.60773186)

摘　　要：RFID(Radio Frequency Identification)射频识别系统中,如何在识别标签基本信息的基础上进一步精准地感知标签的实时位置一直是一个重要问题.本文首次提出一种基于二维相控阵天线的非测距RFID标签定位方法(Phased Array based Range Free Tag Localization,PATL).该方法利用相控阵天线辐射波束角度可调的特点,对搜索平面依次进行扫描,并通过统计不同天线区域内标签出现的次数,利用加权算法给出标签的二维位置.该方法能够在不借助参考标签或辅助设备的前提下对多个目标标签进行实时定位.通过利用一款集成有相控阵天线的商用超高频RFID阅读器对方法进行了实验验证.结果表明,算法的定位精度能达到21cm.In radio frequency identification(RFID)systems,excepting to identify the basic information of target,how to additionally aware the precision position of the target is an important and pressing research topic.In this paper,we propose a novel range free tag localization scheme based on phased array antenna for RFID system,called PATL.This method takes advantage of the adjustable radiation angle of the phased array antenna to scan the surveillance region in turns.By using the statistics of the tags’number in different antenna beam directions,a weighting algorithm is used to calculate the position of the tag.This method can be applied to real-time location of multiple targets without usage of any reference tags or additional readers.We use a COTS UHF RFID reader which is integrated with a phased array antenna to evaluate our method.The results show the average is about 21cm and the time consumption also satisfy the real time performance.

关 键 词：无线射频识别 相控阵天线 定位 非测距 权重 

分 类 号：TN957[电子电信—信号与信息处理]