基于单天线相位的UHF RFID室内定位算法研究  

Research on UHF RFID indoor location algorithm based on single antenna phase

作　　者：陈港能[1] 朱洪辉 Chen Gangneng;Zhu Honghui(College of Printing Media and Art,Zhangzhou Institute of Science and Technology,Zhangzhou 363000,China;College of Electromechanical and Information,Zhangzhou Institute of Science and Technology,Zhangzhou 363000,China)

机构地区：[1]漳州理工职业学院印刷传媒与艺术学院,福建漳州363000 [2]漳州理工职业学院机电与信息学院,福建漳州363000

出　　处：《湖南文理学院学报（自然科学版）》2023年第4期25-30,共6页Journal of Hunan University of Arts and Science(Science and Technology)

基　　金：2021年漳州市科技特派员项目(2021S350681028)。

摘　　要：基于单天线相位的UHF RFID,采用双标签的定位方法,对室内定位算法进行了研究,结果表明:待定位目标边长距离在超过高频载波信号波长的情况下,有2个间距为1/2载波波长的无源标签附着于特定目标上。仿真表明:在三条路径、两条路径情况下,两步测距可估计平均定位误差;两步测距(副载波)方法也可估计平均定位误差;但两步测距(副载波)方法基于双标签定位中,无法确保阅读器与2个标签间距离大小关系。在三条路径、两条路径情况下,两步测距(副载波)方法误判率分别为17.45%、17.82%,两步测距(载波)方法误判率均为0,故两步测距(载波)方法可将定位误差降低,确保物品登记准确性。Based on UHF RFID with single antenna phase,the indoor positioning algorithm is studied by using the positioning method of double tags.The results show that when the side length distance of the target to be positioned exceeds the wavelength of the high–frequency carrier signal,there are two passive tags with 1/2 carrier wavelength spacing attached to the specific target.The simulation results show that the average positioning error can be estimated by two–step ranging under three paths and two paths.The two–step ranging(subcarrier)method can estimate the average positioning error.However,the two–step ranging(subcarrier)method based on the two–tag location cannot ensure the relationship between the reader and the distance between two tags.In the case of three paths and two paths,the misjudgment rate of the two–step ranging(subcarrier)method is 17.45%and 17.82%,respectively,and the misjudgment rate of the two–step ranging(carrier)method is 0.The two–step ranging(carrier)method can reduce the positioning error and ensure the accuracy of item registration.

关 键 词：室内定位 算法 单天线相位 射频识别技术 载波 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]