通信学报2024，Vol.45Issue(3)：92-103,12.DOI:10.11959/j.issn.1000-436x.2024054
RFreeTrack:基于差分相位全息图的RFID非接触式鲁棒定位系统
RFreeTrack:RFID non-contact robust positioning system based on differential phase holography
摘要
Abstract
To address the issue of large positioning errors in complex environments within non-contact RFID-based posi-tioning systems,RFreeTrack system was proposed.Commercial RFID equipment was used to calculate the reflected sig-nals from targets,achieving high-precision non-contact positioning in complex environment.Firstly,a search method based on time-series similarity was proposed to employ for calibrating static signals,thus significantly enhanced the ro-bustness of target reflection signal extraction.Secondly,a non-contact positioning method based on differential phase holography was introduced to eliminate the influence of the reader antenna's position,thus the accuracy of position-ing was improved and the complexity of system was deployment reduced as well.Finally,a high-precision non-contact positioning system prototype was realized.Experimental results indicate that in complex environments,the phase of the target reflection signals extracted using the calibrated static signals has a 68.8%lower error com-pared to existing methods.Based on the previously calibrated static reflection signals,the average positioning error using differential phase holography in complex environments is 0.040 8 m,and has a 50.6%improvement on loca-tion over existing methods.关键词
射频识别/室内定位/非接触式定位/静态信号校准/差分相位全息图Key words
RFID/indoor localization/non-contact localization/static signal calibration/differential phase hologram分类
信息技术与安全科学引用本文复制引用
桂林卿,蒋祎,张卿云,肖甫..RFreeTrack:基于差分相位全息图的RFID非接触式鲁棒定位系统[J].通信学报,2024,45(3):92-103,12.基金项目
国家杰出青年科学基金资助项目(No.62125203) （No.62125203）
国家自然科学基金资助项目(No.61932013,No.62372246) The National Science Fund for Distinguished Young Scholars of China(No.62125203),The National Natural Science Foundation of China(No.61932013,No.62372246) （No.61932013,No.62372246）
