基于开放式软件无线电平台的RFID系统研究与仿真

发布时间：2018-04-14 22:42

本文选题：UHF + RFID　；参考：《南京邮电大学》2013年硕士论文

【摘要】：射频识别技术（RFID）作为一种无线自动识别技术，已广泛应用在身份标识、交通运输、制造与物流、防伪与公共安全等领域。其中，860-960MHz的超高频（UHF）RFID技术以其读写距离、识别速度和保密性能方面的优势成为实现物联网的主要频段。实际应用环境的复杂多变性，对其性能提出了更高的要求。本文利用软件无线电（SDR）将模块化、标准化和通用化的硬件单元以总线方式连接起来构成通用平台，尽可能使用x86处理器和软件系统来完成数字基带部分的处理，，实现数据的无线传输功能。本文首先阐述了软件无线电中的关键技术和RFID的工作流程，介绍了其应用和发展现状。接着分析了UHF RFID标准体系，并重点研究EPC C1G2标准，使用Matlab/Simulink工具对其前向链路和反向链路中的调制与编码方式进行仿真分析。然后介绍了开放式软件无线电平台的硬件部分和软件架构，设计收发通信过程，利用C++和Python编写通信模块。将硬件平台与x86处理器结合后，进行系统联调测试，记录实验结果并分析，实现了频谱检测功能及数据的无线传输。最后，本文对嵌入式操作系统进行分类。在对UHF RFID数据传输技术深入分析的基础上，在嵌入式Linux下实现RFID系统最小字库的建立，完成界面的显示工作，成功精简了软件系统，提高了执行速度。
[Abstract]:Radio Frequency Identification (RFID), as a wireless automatic identification technology, has been widely used in identification, transportation, manufacturing and logistics, anti-counterfeiting and public safety.UHF RFID technology with 860 ~ 960MHz has become the main frequency band to realize the Internet of things because of its advantages in reading and writing distance, recognition speed and security performance.Because of the complex variability of practical application environment, higher requirements for its performance are put forward.In this paper, the modularized, standardized and universal hardware units are connected to form a common platform by means of the software radio SDR. The x86 processor and the software system are used as far as possible to complete the processing of the digital baseband part.The wireless transmission function of data is realized.In this paper, the key technology of software radio and the working flow of RFID are introduced, and its application and development are introduced.Then, the UHF RFID standard system is analyzed, and the EPC C1G2 standard is studied emphatically. The modulation and coding methods in forward link and reverse link are simulated and analyzed by Matlab/Simulink tool.Then the hardware and software architecture of the open software radio platform are introduced. The communication process is designed and the communication module is written with C and Python.After combining the hardware platform with x86 processor, the system is combined and tested, the experimental results are recorded and analyzed, and the spectrum detection function and the wireless transmission of data are realized.Finally, this paper classifies the embedded operating system.Based on the deep analysis of UHF RFID data transmission technology, the minimum character library of RFID system is built under embedded Linux, the display of interface is completed, the software system is simplified and the execution speed is improved.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP391.44;TP368.1

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