计算机科学 ›› 2023, Vol. 50 ›› Issue (11): 296-305.doi: 10.11896/jsjkx.230300165
何勇, 郭政鑫, 桂林卿, 盛碧云, 肖甫
HE Yong, GUO Zhengxin, GUI Linqing, SHENG Biyun, XIAO Fu
摘要： 室内多目标的高精度定位技术是实现定制化智能服务的关键。当前,基于射频识别技术(Radio Frequency Identification,RFID)的室内定位技术因其成本低、易于部署和多目标感知等优势,受到了学术界和产业界的广泛关注。然而,传统的基于RFID的多目标相对定位系统需要使用多组接收天线进行数据收发,这导致系统的部署成本高昂,同时接收信号强度指示(Received Signal Strength Indication,RSSI)序列还会出现数据中断的问题。为解决这些问题,提出了一种基于RSSI序列特性的RFID多标签相对定位方法。该方法首先采用匀速移动天线的方式来获取多目标标签的接收RSSI信号序列;然后,对接收RSSI数据进行预处理来填充缺失数据,并构建基于余弦相似度的序列相似度量表;最后,从多个组维度设计不同的标签分组算法,以实现RFID多标签的相对定位。通过对典型室内多组RFID标签阵列进行大量相对定位测试,实验结果表明,所提方法的RFID标签相对定位平均准确率超过92％,对5*5的天线阵列平均定位计算时长小于1 s,相比其他工作计算效率提高了近10倍。
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