基于USRP的无线射频识别平台设计与实现

目前射频识别技术(RFID)有着广泛的应用,但由于RFID的标准众多,不同标准的标签需要不同的阅读器进行识别,这给RFID的应用开发带来了不便。首先,介绍了RFID技术和软件无线电技术的发展状况;其次,介绍了软件无线电技术的基本原理和关键技术,分析了GNU Radio开放软件无线电平台的软件体系结构和开发模式,包括软件GNU Radio的组成要素和运行流程,并且介绍连接的硬件设备USRP的母板和子板的基本知识。将软件无线电外设USRP和软件GNU Radio相结合,设计并实现了RFID读写器与标签之间的无线通信信息采集。搭建了GU-RFID平台,对相关功能进行了测试。最后,利用GU-RFID平台完成了超高频RFID系统的ASK数字调制,为进行RFID通信的MAC层研究和安全隐私保护技术研究提供了平台基础。

Design and Implementation of RFID Platform Based on USRP

At present,RFID technology has been widely used,but due to the numerous RFID standards,different standards of tags need different RFID readers for identification,which brings inconvenience to the application of RFID.Firstly,the development of RFID technology and software radio technology is briefly introduced.Secondly,the basic principles and key technologies of software Radio technology are introduced,the software architecture and development mode of GNU Radio open software Radio platform are analyzed,including the internal structure and working process of GNU Radio,and the basic information of USRP main board and sub-board is discussed.Using the architecture of software Radio USRP+GNU Radio platform,the wireless communication information collection between RFID reader and tag is designed and realized.GU-RFID platform is built and relevant functions are tested.Finally,the ASK digital modulation of UHF RFID system is completed by using the GU-RFID platform,which provides the platform foundation for the research of MAC layer and security privacy protection technology of RFID communication.