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Analysis and measurement for passive tag modulationperformance of backscatter link

Li Bing He Yi-Gang Hou Zhou-Guo She Kai Zuo Lei

Analysis and measurement for passive tag modulationperformance of backscatter link

Li Bing, He Yi-Gang, Hou Zhou-Guo, She Kai, Zuo Lei
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  • Abstract views:  1403
  • PDF Downloads:  838
  • Cited By: 0
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  • Received Date:  08 October 2010
  • Accepted Date:  14 February 2011
  • Published Online:  15 August 2011

Analysis and measurement for passive tag modulationperformance of backscatter link

  • 1. College of Electrical and Information Engineering, Hunan University, Changsha 410082, China

Abstract: Optimal conditions for maximizing the effectively received power of reader receiver in passive ultra high frequency radio-frequency identification system are analyzed in this paper. The mismatched impendence affecting modulation index of tag backscatter link is discussed. Expressions of backscattered modulation indexes for calculating normalized effective received power of reader receiver, lower boundary of signal-to-noise ratio for demodulated output signal, and bit error rate are derived. Modulation indexes of backscatter link under different parameters are measured in open indoor environment. The measurement results show that the tag can be detected successfully when the modulation index of backscatter link is in a range from 5% to 10%.

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