射频识别防碰撞Q算法的分析及改进

为了减少射频识别系统多个标签防碰撞过程中所消耗的动态功耗,通过对RFID领域超高频频段EPCglobal Class-1Gen-2标准中的标签识别层所采用的防碰撞技术及相关指令的分析,在其基础上对Q算法提出改进方案。该方案使用稳定缓变的帧长度来适应现场标签数量,使帧长度保持在最优值,减小标签内部门电路翻转频率,从而降低了标签防碰撞过程中总动态功耗81.8%。仿真实验结果表明,改进后的Q算法帧长度调整频率低于改进前的Q算法帧长度调整频率。

Improved anti-collision Q-algorithm for RFID system

To decrease dynamic power when many tags are identified by anti-collision technology in RFID system,the research of anti-collision scheme and related commands used in tag-identification layer of mainly standard in RFID filed at UHF: EPCglobal Class-1 Gen-2 is introduced in detail.Some improvements about Q-Algorithm are done according to the above research,which adapt to the num-bers of tags in field by using steady frames.This method maintains optimum frame length to reduce flipping frequency of gate circui...