• Piezoelectrics & Acoustooptics
  • Vol. 42, Issue 1, 51 (2020)
HUANG Hongwei1, CHEN Zhijun1, ZHONG Yueyun1, ZHU Weijun2, and XU Fuqing1
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
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    DOI: 10-11977/j.issn.1004-2474.2020-01-013 Cite this Article
    HUANG Hongwei, CHEN Zhijun, ZHONG Yueyun, ZHU Weijun, XU Fuqing. Design of Anti-collision Code of Surface Acoustic Wave Tag Based on CIDT[J]. Piezoelectrics & Acoustooptics, 2020, 42(1): 51 Copy Citation Text show less

    Abstract

    On the basis of analyzing the anti-collision principle of the correlation inter-digital transducer (CIDT), by using correlation function and taking the autocorrelation and cross-correlation characteristics of the codes as indicators, two sets of phase codes which respectively containing eight sequences were obtained from the search through the pseudo-random code Gold sequences and Walsh sequences. The δ function model of the CIDT was established to simulate its transfer function and the surface acoustic wave response signals of the CIDTs encoded by the two sets of phase codes were analyzed. The research shows that the CIDTs encoded by Walsh sequences have better anti-collision performance, which indicates that the cross-correlation of codes plays a more critical role in anti-collision performance compared with the autocorrelation codes.
    HUANG Hongwei, CHEN Zhijun, ZHONG Yueyun, ZHU Weijun, XU Fuqing. Design of Anti-collision Code of Surface Acoustic Wave Tag Based on CIDT[J]. Piezoelectrics & Acoustooptics, 2020, 42(1): 51
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