【作者】 赵晓霞；

【导师】 昂志敏；

【作者基本信息】 合肥工业大学 ， 电路与系统， 2010， 硕士

【摘要】 射频识别技术(Radio Frequency Identification,RFID)是从二十世纪八十年代开始走向成熟的一项自动识别技术。它利用射频方式进行非接触式的双向通信,交换数据,从而达到识别的目的。其中超高频(UHF)射频识别系统有着读写距离远,阅读速度快等优点,是目前国际上RFID产品发展的热点。在社会众多领域内大规模应用,其对改善人们的生活质量、提高企业经济效益、加强公共安全以及提高社会信息化水平都产生了重大影响。本文在综合了国内外近年来在UHF RFID阅读器数字系统结构、算法以及相关实现技术研究进展的基础上,完成了融合ISO18000-6TypeA、B协议和EPC Gen2标准的RFID阅读器的关键系统与模块设计。介绍了UHF频段的RFID阅读器的研究背景,应用领域,并对适用协议进行了比较说明;对适合ISO和EPC Gen2标准的编解码协议利用MATLAB软件进行仿真,验证并分析了其性能;在理论分析的基础上,选取了性能和价格合适的元器件进行阅读器的硬件设计,其中射频部分采用分立元件,有利于自主性创新,独立开发产品;基带部分采用FPGA和单片机相结合的方式有利于电路的灵活设计,数据的大量存储和高速的数据处理。最后分析了普遍适用的二进制和ALOHA防碰撞算法,并再此基础上提出了一种基于CDMA技术的码分时隙ALOHA算法,提高了系统的吞吐量。更多还原

【Abstract】 RFID (Radio Frequency Identification) is the technical from the twentieth century is beginning to mature an automatic identification technology. It uses RF approach to non-contact two-way communication,exchange of data, so as to achieve the purpose of identification. One ultra-high frequency (UHF) radio frequency identification system have the advange of reading and writing distance far and fast. it is the international RFID product development hot spots. In the large-scale applications within many areas of society, their right to improve people’s quality of life, improve economic efficiency of enterprises, strengthen public safety and raise the level of information society have had a significant impact.In this paper, an integrated home and abroad in recent years, digital UHF RFID reader system architecture, algorithms and implementation techniques related research based on the integration of independently completed the ISO18000-6 TypeA, B Agreement and the EPC Gen2 standard RFID reader system and the key to module design.Introduce the UHF band RFID reader of the research background, applications, and compare the application protocols; use MATLAB software to simulate the code and decode protocol which appropriate ISO and EPC Gen2 standard protocol, verification and analysis of its performance; In theory basis of the analysis, we select the proper performance and price of hardware components designed for readers, the RF part use the discrete components,it is useful for innovation and independent product development; The base band part combined the FPGA with MCU,This way is flexible for circuit designing, data storaging and high-speed data processing. Finally Analysis a universal binary and ALOHA anti-collision algorithm, and then puts forward a new slotted ALOHA algorithm technique based on CDMA, improved system throughput.更多还原