通信学报 ›› 2015, Vol. 36 ›› Issue (2): 20-28.doi: 10.11959/j.issn.1000-436x.2015030

• 学术论文 • 上一篇    下一篇

物理层的超高频RFID标签信号分离

吴海锋,曾玉   

  1. 云南民族大学 电气信息工程学院,云南 昆明 650500
  • 出版日期:2015-02-25 发布日期:2017-06-27
  • 基金资助:
    国家自然科学基金资助项目;云南省应用基础研究计划项目;云南省教育厅科学重大基金资助项目;云南省教育厅科学重点基金资助项目;云南民族大学创新团队建设基金资助项目;云南省第十七批中青年学术和技术带头人后备人才资助项目

Passive UHF tag collision resolution on PHY layer

Hai-feng WU,Yu ZENG   

  1. School of Electrical and Information Technology,Yunnan University of Nationalities,Kunming 650500,China
  • Online:2015-02-25 Published:2017-06-27
  • Supported by:
    The National Natural Science Foundation of China;Applied and Basic Research Foundation of Yunnal Province;The Major Special Project of Scientific Research Foundation of Yunnal Provincial Department of Education;The Scientific Research Foundation of Yunnan Provincial Department of Education;A Grant From Innovative Research Team in Yunnan University of Nationalities

摘要:

提出一种分离冲突信号算法,先用动尺度变换将冲突信号变换至时—尺域并得到变换矩阵,然后由最小二乘和最小均方误差准则将冲突信号分离以检测标签信号。仿真结果表明,相比传统标签分离方法,所提方法仅采用单接收天线就可分离2个以上冲突标签信号,并在无捕获效应下也具有良好分离性能。

关键词: RFID, 冲突标签信号分离, 跨层方法, 超高频, 物理层

Abstract:

An algorithm was proposed to separate the collided signals on the PHY layer.The proposed algorithm firstly adopts a dynamic-scale transformation to transform the collided signals to time-scale domains.And then,a transforming matrix would be obtained from the transformation.Finally,least square and minimum mean square error criterion are utilized to separate the collided tag signals.Simulation results show that,in contrast to the conventional signal separation approaches,the proposed algorithm can separate more than two tag signals under single-antenna condition and have better performance of separation even without capture effect.

Key words: RFID, collided tag signal separation, cross layer; UHF, physical layer

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