基于FPGA的符合18000-6C协议的RFID读写器基带及软件设计

发布时间：2018-03-04 01:00

本文选题：射频识别　切入点：ISO/IEC　出处：《电子科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：作为一种高效率的自动识别与数据采集技术,射频识别技术近几年在国内外飞速发展,其应用范围也在逐渐扩大,各种RFID应用产品产量正如雨后春笋般爆发式增长。在这样的应用背景下,对RFID技术的研究已然成为当今的热点,而由于UHF频段的RFID读写器具有读写速度快、读取距离远、可读多标签等优点,使其适合相当多的应用场景,因此在此频段的RFID技术的研究更是重中之重。但是,我国RFID产业的发展总体上相对落后于世界先进水平,尤其是在UHF频段的研究由于其技术较为复杂而导致我国在该频段的技术发展较为滞后。因此,设计一款具有自主知识产权的UHF RFID读写器会对我国RFID技术的发展起到一定的推动作用。本文的主要内容是利用FPGA设计并实现基于ISO/IEC18000-6C协议的UHF RFID读写器数字基带系统。为此,本文主要进行了以下几项工作:首先,对当前RFID技术的发展历程和趋势进行了简要介绍,介绍了当前几种主流的RFID标准,并对ISO/IEC 18000-6C协议进行了详细介绍,从物理层的编码解码技术、调制解调技术,到标签识别层的阅读器命令和标签的状态,再到各种防碰撞技术的原理。然后,在分析了读写器系统的整体架构,并确定了读写器的设计技术指标的基础上,详细介绍读写器数字基带系统的设计过程,包括发送链路、接收链路和控制模块的设计,其中发送链路包括PIE编码、升余弦滚降滤波、希尔伯特滤波以及校验部分,接收链路包括信道滤波、Miller/FM0解码、解校验等部分。读写器软件设计主要介绍了协议处理模块和底层代码的设计。接着在第四章介绍了系统关键模块的具体电路实现,并对各模块功能进行了modelsim仿真验证。并且介绍了读写器软件的实现。之后在FPGA上实现了UHF读写器数字基带系统。最后,对读写器系统进行了测试,将各模块测试结果与仿真结果进行对比和分析,经过实际的测试和分析,读写器基带系统各模块和系统的整体功能得到了验证。
[Abstract]:As a highly efficient automatic identification and data acquisition technology, RFID technology has developed rapidly in recent years at home and abroad, and its application scope is also gradually expanding. The output of all kinds of RFID applications is exploding. Under such application background, the research on RFID technology has become a hot spot nowadays, and because of the fast reading and writing speed and long reading distance of RFID reader in UHF band, The advantages of readable multi-label make it suitable for quite a lot of application scenarios, so the research of RFID technology in this frequency band is the most important. However, the development of RFID industry in our country generally lags behind the advanced level of the world, in general, the development of RFID industry in our country lags behind the advanced level of the world on the whole. Especially in the UHF frequency band, because of the complexity of the technology, the development of the technology in this frequency band in China is lagging behind. The design of a UHF RFID reader with independent intellectual property rights will promote the development of RFID technology in China. The main content of this paper is to design and implement the UHF RFID reader digital baseband system based on ISO/IEC18000-6C protocol. The main work of this paper is as follows: firstly, the development course and trend of current RFID technology are briefly introduced, several mainstream RFID standards are introduced, and the ISO/IEC 18000-6C protocol is introduced in detail. From the physical layer of coding and decoding technology, modulation and demodulation technology, to the tag recognition layer of the reader command and the status of the label, and then to the principles of various anti-collision technologies. Then, in the analysis of the overall structure of the reader system, The design process of the reader digital baseband system is introduced in detail, including the design of the transmission link, the receiving link and the control module, in which the transmission link includes PIE coding. Raised cosine roll down filter, Hilbert filter and check part, receive link includes channel filter / Miller / FM 0 decoding, The software design of the reader mainly introduces the protocol processing module and the design of the underlying code. Then, in chapter 4th, it introduces the specific circuit implementation of the key modules of the system. The functions of each module are verified by modelsim simulation, and the realization of the reader software is introduced. Then, the digital baseband system of UHF reader is implemented on FPGA. Finally, the reader system is tested. The test results of each module and the simulation results are compared and analyzed. Through the actual test and analysis, the whole function of each module and system of the reader baseband system is verified.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TP391.44;TP311.52

【共引文献】