针对符合ISO/IEC 18000-6B标准的UHF RFID读写器需要高效地解码FM0编码的基带信号，从而高效地识别标签返回信息的要求，提出了利用高速MCU分段多次同步、多次采样并结合IQ正交信号复合校验的解码方法对四通道零中频接收机解调出来的FM0基带信号进行解码。通过实验表明，该方法提高了UHF RFID读写器解码FM0信号的效率，在10 m的读卡距离下，解码标签信息的误码率小于0.5%。 Abstract: Aiming at the requirement of efficient decoding FM0 encoded baseband signal from the UHF RFID reader which complied with ISO/IEC 18000-6B standard ，the article introduced a new method which utilized sub-multiple synchronous and combination checking of multiple sampling and composite IQ quadrature-signal by high-speed MCU. Testing result shows the decoded bit error rate of label information less than 0.5% when the reading distance is 10 meters. A RFID tags decoding method with high accuracy and strong practicability was achieved.
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