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Analysis and improvement for UHF RFID reading region in real environments

Zuo Lei He Yi-Gang Li Bing Zhu Yan-Qing Fang Ge-Feng

Analysis and improvement for UHF RFID reading region in real environments

Zuo Lei, He Yi-Gang, Li Bing, Zhu Yan-Qing, Fang Ge-Feng
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  • Abstract views:  3016
  • PDF Downloads:  581
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Publishing process
  • Received Date:  07 January 2012
  • Accepted Date:  01 June 2012
  • Published Online:  05 December 2012

Analysis and improvement for UHF RFID reading region in real environments

  • 1. College of Electrical and Information Engineering, Hunan University, Changsha 410082, China;
  • 2. School of Electrical and Automation Engineering, Hefei University of Technology, Hefei 230009, China;
  • 3. National Key Laboratory of National Defense Science&Technology on Electronic Test & Measurement, The 41st Research Institute of China Electronics Technology Group Corporation, Qingdao 266555, China
Fund Project:  Project supported by the National Natural Science Foundation for Distinguished Young Scholars of China (Grant No. 50925727), the National Natural Science Foundation of China (Grant No. 60876022), the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 51107034), the National Defense Advanced Research Project (Grant No. C1120110004), and the Research Foundation of Education Bureau of Hunan Province, China (Grant No. 11C0479).

Abstract: The reading region of ultra high frequency radio-frequency identification (UHF RFID) system is affected by polarization mismatch, reader antenna height, coherent interference and so on. Based on the principles of RFID technology and ray-tracing method, a complete propagation model in real environments is derived. Utilizing recognition rate of target region (RRTR), a method of evalualing the performances of a system is presented. In order to obtain the maximization of RRTR, two solutions including tag diversity and phase switch are proposed, which combines the theories of electromagnetic propagation and coherent interference suppression. The values of RRTR under different parameters are measured in outdoor and indoor environments with a commodity hardware. The measurement results show that the values of RRTR can be enhanced by 10% and 7.6% with the two solutions respectively.

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