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射频识别系统中自适应反碰撞法的实现

DOI: 10.13190/jbupt.200806.76.gengshq, PP. 76-79

Keywords: 射频识别,通信,有源应答器,防碰撞,识别率

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Abstract:

提出了一种基于射频识别系统的改进的自适应时隙Aloha(IDFSA,improveddynamicframedslottedAlohaalgorithm)算法.在RFID系统的设计阶段完成了对应答器的分组,并对分频后的实时时隙数进行了优化.介绍了此算法在实际超高频射频识别系统中的应用.取代了传统的估算和实时分组方法,提高了系统效率,使碰撞率下降了2.67倍,从而有效地提高了信道的利用率,解决了时隙数随应答器数增加而指数增长的问题.通过实际系统433/868/915的实现,验证IDFSA算法的简单有效性.

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