一种对时钟偏差不敏感的无源RFID标签编解码算法

基于我国自主射频识别空中接口协议GJB 7377.1-2011,提出了一种对时钟偏差不敏感的无源RFID标签编解码算法。该算法充分考虑了时钟频率偏差、计数误差、分频误差等对编解码的影响,推导出了标签正确编解码所需的时钟约束条件,并得到了标签编解码的基本思路和方法。仿真结果表明,提出的编解码算法对标签时钟精度要求较低,只要时钟频率大于1.60 MHz,即可满足要求,大大降低了硬件实现的难度和复杂度,与同类实现方式相比,功耗降低了近50%。

A coding and decoding algorithm for passive RFID tags featuring variation-tolerance

Based on the independent national protocol (GJB 7377.1-2011), we proposed a coding and decoding algorithm for passive RFID tags, which features variation-tolerance of the clock frequency. This algorithm substantially considered the influence upon coding and decoding caused by clock frequency variation, counting error, dividing error, et al. Subsequently, we deduced the clock restriction that ensures correct coding and decoding, and found the method to implement coding and decoding. As the simulation results show, the proposed algorithm has a low requirement of clock accuracy. It will meet the demand as long as the clock frequency is higher than 1.60 MHz. Furthermore, this algorithm dramatically reduces the difficulty and complexity of hardware implementation. Compare with that of previous works, the power consumption of this work decreases by nearly 50%.