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As a wireless automatic identification technology, radio frequency identification (RFID) hasbeen widely applied in identification, transportation, manufacturing, logistics, anti-counterfeitingand public safety areas, while860-960MHz ultra high frequency (UHF) RFID technology becomesthe main band of Things for its advantages in reading and writing distance, recognition speed andthe performance of confidentiality. The complex and volatile of the actual application environmentbrings the higher requirements for its performance. In this paper, software-defined radio(SDR)makes modular, standardized and common hardware units connected together to form a generalplatform with the bus mode, uses the x86processor and software system to complete the processingof digital baseband section as much as possible, accomplishes the wireless transmission of data.This paper first describes the key technologies of software-defined radio and the RFIDworkflow, introduces their current status on application and development. Followed by analysesthe UHF RFID standard system, and focuses on EPC C1G2standard, uses Matlab/Simulink tosimulates and analyzes the modulations and encodings in forward link and reverse link. Thenintroduces the hardware and software architecture of open software radio platform, designs thetransceiver communication process, uses C++and Python to write communication modules. Aftercombined the hardware platform and x86processor, joints and tests the systems, recordings theexperimental results for analysis, accomplished the function of frequency spectrum detection andwireless data transmission.Finally, this paper classifies the embedded operating systems. On the basis of the analysis onUHF RFID data transmission technology, completes the minimum font establishment and interfacedisplay of RFID system under the embedded Linux, successfully streamlines the software system,increases the execution speed.
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