UHF RFID Software Radio Emulator System

Radio Frequency Identification is one of the research hotspots in the field of information technology.Ultra-high frequency(UHF)RFID has been widely used in traffic management,warehouse storage,animal identification and other industries due to its advantages of long recognition distance,low power consumption,fast information interaction rate and low cost.With the rapid development of RFID technology in various fields,there are many kinds of RFID readers on the domestic market,but there is a lack of effective RFID testing system to test the performance of RFID readers.There is no mature standard protocol in UHF RFID communication protocol and air interface in China,so the design of an effective UHF RFID software radio emulation system is of great significance to the performance parameter test of RFID readers and the analysis and verification of UHF RFID protocol.The system is a UHF RFID software radio emulator system based on the ISO /IEC 18000-6C UHF RFID protocol.This article uses this system to complete not only the analysis and verification of the modulation and demodulation method and baseband data processing method of the RFID tag communication link,but also the measurement of the RFID protocol parameters.This dissertation firstly analyzes the characteristics of the physical layer and tag identification layer of the ISO/IEC18000-6C UHF RFID protocol,which is widely used at present and introduces the research method and design scheme of UHF RFID software radio emulation system.The hardware architecture of the system adopts Xilinx's All Programmable So C program,where in the RF front end of the system is composed of AD9361 chips.ADC,DAC control circuit,SPI serial communication interface circuit and label baseband processing circuit are provided by Zynq platform.UHF RFID digital baseband processing module is the key part of the system design,This dissertation designs the control mode of RF front-end AD9361 and the working mode of SPI serial communication,the label in the baseband data processing module ASK reconciliation tone modulation module,PIE decoding module,CRC check module,pulse shaping module,low-pass filtering module,FM0 coding module and the master state machine module are analyzed and designed,and then gives out the design of various modules of the simulation waveform.In this dissertation,the software of Chipscope system logic analyzer and oscilloscope are used to test the hardware platform of UHF RFID software radio emulation and the processing part of label data base band.After debugging on the upper board,the hardware verification platform of UHF RFID software radioemulation system established by Zynq series Zedboard card and FMCOMMS2 of ADI company can process and reply the information sent by the reader,which meets the design requirements of the system.