提出了一种全新的射频识别(RFID)数字接收机的实现方案。针对RFID系统实时性的要求,该设计采用简化的相关算法取代数字锁相环结构,快速准确地捕获频率范围在31.2kHz-780.8kHz内的突发信号,并实现接收数据解码。与采用过零检测方案的数字接收机相比,本设计具有更强的抗干扰能力。该数字接收机在Altera Stratix II EP2S60上验证通过,取得了良好的性能。 A new implementation scheme of RFID digital receiver is proposed. In order to meet the real-time requirements of RFID system, this design uses a simplified correlation algorithm to replace the digital phase-locked loop structure, quickly and accurately capture the burst signal in the frequency range of 31.2kHz-780.8kHz, and realize the received data decoding. Compared with the digital receiver adopting the zero-crossing detection scheme, the design has stronger anti-interference ability. The digital receiver was verified on the Altera Stratix II EP2S60 for good performance.