针对现有单天线射频识别(RFID)阅读器工作在超高频(UHF)频段因盲区和干扰影响较大而难以保证多标签识别的可靠性的问题,提出了增加天线个数的多天线识别模式,即采用与阅读器相连的多个天线,合理地部署在阅读区域的不同位置,以增强覆盖效果,减少阅读盲区,提高RFID阅读器多标签识别的可靠性,而且建立了基于多天线识别模式的多标签识别模型,设计了多天线优化控制方案,并对识别的可靠性进行评估.实验结果表明:多天线模式对提高阅读器多标签识别的可靠性效果显著,这为UHF RFID阅读器多标签识别可靠性的提高开辟了新途径.%Considering that existing radio frequency identification ( RFID) readers using a single antenna can not guarantee their multi-tag identifying reliability when operating at the ultra-high frequency (UHF) because of the influences of read blind spots and interference, this study presents a new identification mode based on increasing the antennas of a RFID reader. According to the model, multiple antennas are connected to a reader and deployed in different directions of the reader field reasonably to heighten the coverage effect and decrease the read blind spots, finally, to improve the reader' s multi-tag identification reliability. And an optimal multi-antenna control program is designed and a multi-tag identification model based on the multi-antenna mode is established. The identification reliability evaluation was conducted by simulation and experiment and the results indicated that the reliability of the multi-tag identification system could be increased using the multi-antenna mode. And this new way has some referential value for increasing the multi-tag identification reliability of RFID readers.
展开▼
