多天线UHF RFID标签阅读器的多标签识别优化算法

Optimization of multi-tag identification for UHF RFID multi-antenna tag readers

针对现有的超高频（UHF）射频识别（RFID）标签阅读器使用单个天线，难以保证多标签识别可靠性的问题，提出了一种通过增加天线个数，以增强覆盖效果、减少识别盲区、增强多标签识别可靠性的RFID多天线识别模式，并利用遗传算法对识别过程中启用天线的个数进行优化，通过合理处理选择、交叉、变异遗传算子以提高RFID阅读器多标签识别的可靠性。实验结果表明：增加天线个数可以增强覆盖效果、减少识别盲区；基于遗传算法的识别优化算法具有良好的搜索性和收敛性，提高了系统识别的可靠性。该研究为复杂环境下应用超高频RFID技术提供了新思路。

This paper pays attention to the problem that it is difficuh for existing UHF RFID （radio frequency identifica- tion） tag readers with a single antenna to assure their reliability in multi-tag identification, and proposes a RFID multi-antenna identification mode, which increases the number of antennas to increase the recovery and reduce the blind zone during identification, and finally to improve the reliability of muhi-tag identification. This paper adopts the genetic algorithm （GA） to optimize the number of antennas during identification by using the operators of selec- tion, crossover, and mutation for improving the reliability of muhi-tag identification of a RFID reader. The experi- mental results show that the proposed RFID multi-antenna identification mode is effective in improving the recovery and reducing blind zone, and the identification optimizing algorithm based GA has the satisfied capability in search- ing and convergence, it can improve the reliability of system identification. This study provides a new idea for the application of the UHF RFID technology in complex environments.