In a passive ultra-high frequency ( UHF ) radio frequency identification ( RFID ) system, the recovery of collided tag signals on a physical layer can enhance identification efficiency. However, frequency drift is very common in UHF RFID systems, and will have an influence on the recovery on the physical layer. To address the problem of recovery with the frequency drift, this paper adopts a radial basis function ( RBF ) network to separate the collision signals, and decode the signals via FM0 to recovery collided RFID tags. Numerical results show that the method in this paper has better performance of symbol error rate ( SER ) and separation efficiency compared to conventional methods when frequency drift occurs.

中文翻译：

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通过物理层上的频率漂移恢复冲突的RFID标签

在无源超高频（UHF）射频识别（RFID）系统中，在物理层上恢复冲突的标签信号可以提高识别效率。但是，频率漂移在UHF RFID系统中非常普遍，并且会影响物理层的恢复。为了解决频率漂移带来的恢复问题，本文采用径向基函数网络（RBF）分离碰撞信号，并通过FM0解码信号以恢复冲突的RFID标签。数值结果表明，与传统方法相比，该方法在出现频率漂移时具有更好的符号误码率和分离效率。