一种RFID的曼彻斯特解码技术

Manchester Code Decoding Technology for RFID

对射频芯片输出的数据进行解码是射频卡应用系统中的关键问题。通过分析EM4095的工作原理和EM4100的编码机制,得出射频芯片输出64位曼彻斯特码的特点,并给出了软件实现算法。利用中断捕获脉宽的方法进行解码,不但硬件接口简单,而且解码速度快,准确率高,同时也为曼彻斯特解码算法提供了一种新的思路。

Decoding the output data from radio frequency chip is the key problem of RFID application system. The article analyzes the working principle and the encoding mechanism of EM4100, summarizes the features of the output 64-bit Manchester code of RF chip, and provides the software implementation algorithms. Interrupt pulse width capture is used to decode the Manchester code, not only simplifing the hardware interface but also improving the decoding speed and precision. The article provides a new method to decode the Manchester code.