Journal of Xidian University ›› 2016, Vol. 43 ›› Issue (2): 108-113.doi: 10.3969/j.issn.1001-2400.2016.02.019

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Method for detecting optimal distribution of RFID multiple tags based on Fisher matrix

YU Yinshan1,2;YU Xiaolei2,3;LIU Jialing1,2;ZHAO Zhimin1;WANG Donghua2   

  1. (1. College of Science, Nanjing Univ. of Aeronautics and Astronautics, Nanjing  210016, China;
    2. Jiangsu Institute of Standardization, Nanjing  210029, China;
    3. College of Electronic and Optical Engineering, Nanjing Univ. of Science and Technology, Nanjing  210094, China)
  • Received:2014-10-12 Online:2016-04-20 Published:2016-05-27
  • Contact: YU Xiaolei E-mail:nuaaxiaoleiyu@126.com

Abstract:

Dynamic performance parameters of multiple tags in the RFID system includes reading efficiency, reading distance and so on. The improvement of existing algorithms for the reading performance of multiple tags is limited in the RFID system, so the geometric distribution of tags is arranged reasonably to improve the performance in this paper. In the Fisher matrix of evaluation, we calculate the extremum of the azimuth matrix and obtain the optimal geometric distribution of tags. Then the geometric distribution of multiple tags and the reading performance of the RFID system are evaluated in numerical simulation. Taking the reading distance as the dynamic performance parameter, we design the tray-level RFID application system and test the optimal geometric distribution of multiple tags in simulative dynamic environment. The results show that the optimal geometric distribution of tags, which is obtained by calculating the Fisher matrix, could improve the dynamic performance and reduce the reading error of multiple tags in the RFID system effectively.

Key words: RFID, Fisher matrix, dynamic performance, reading distance, multiple tags, geometric distribution

CLC Number: 

  • TN98