基于FPGA超高频RFID读写器基带编解码的研究与改进

Research and improvement of UHF RFID interrogator baseband encoding and decoding based on FPGA

依据ISO/IEC18000-6协议规定,研究了基于FPGA基带编解码方法,提出一种抗干扰性强的新方法,该方法基于ISO/IEC18000-6中Type B协议,对前向链路中的曼彻斯特编码和反向链路中的FM0解码进行改进,在ISE中进行综合、仿真得出了正确结果;最后通过在ISE的测试代码中添加随机干扰激励信号验证此基带编解码方法抗干扰强的特性.

The baseband decoding method based on FPGA was researched according to the protocol of ISO/IEC18000 -6. A new method was suggested for baseband processing,which has the characteristics of strong anti-interference. The new method used Type B proto- col of ISO/1EC18000 -6B to improve bosh Manchester encoding in the forward link and FMO decoding in the reverse link. And the verilog code was synthesized and simulated by Xilinx ISE software with the new method. The desired experimental result was obtained by adding some random interference signals into the testbench before the ISE simulation was running, which turns out to be with a characteristics of strong anti-interference.