本文關(guān)鍵詞： 超高頻 射頻識(shí)別閱讀器 頻譜分析 FPGA PIE編碼　出處：《西安電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：近幾年來(lái)，物聯(lián)網(wǎng)被確定為中國(guó)戰(zhàn)略性新興產(chǎn)業(yè)之一，作為其中最關(guān)鍵的技術(shù)之一，射頻識(shí)別技術(shù)(Radio Frequency Identification, RFID)是必隨著物聯(lián)網(wǎng)的發(fā)展而逐步擴(kuò)大。射頻識(shí)別技術(shù)通過(guò)無(wú)線電磁波信號(hào)進(jìn)行無(wú)接觸的雙向數(shù)據(jù)通信，獲得相關(guān)數(shù)據(jù)信息，以此實(shí)現(xiàn)對(duì)目標(biāo)的識(shí)別。超高頻(UHF)射頻識(shí)別技術(shù)具有通信距離長(zhǎng)，可識(shí)別運(yùn)動(dòng)目標(biāo)等優(yōu)點(diǎn)，目前已經(jīng)廣泛應(yīng)用于物流管理、門禁控制等需要快速處理和收集數(shù)據(jù)的領(lǐng)域，，尤其是未來(lái)商業(yè)供應(yīng)鏈的市場(chǎng)前景廣闊。 本文的主要工作如下： 基于射頻識(shí)別技術(shù)的基礎(chǔ)理論和超高頻射頻識(shí)別技術(shù)的通信協(xié)議標(biāo)準(zhǔn)，從頻譜分析入手對(duì)國(guó)際標(biāo)準(zhǔn)協(xié)議中規(guī)定的調(diào)制方式以及基帶信號(hào)進(jìn)行了分析與研究。對(duì)比分析了雙邊帶振幅鍵控(DSB-ASK)、單邊帶振幅鍵控調(diào)制(SSB-ASK)、反相位振幅鍵控調(diào)制(PR-ASK)的調(diào)制方法和信號(hào)頻譜，分析了不同調(diào)制方式的特點(diǎn)；探討了殘余邊帶調(diào)制在RFID系統(tǒng)當(dāng)中應(yīng)用的可行性和設(shè)計(jì)難點(diǎn)；通過(guò)分析和探討后搭建了UHF RFID閱讀器的硬件平臺(tái)，符合ISO18000-6C協(xié)議標(biāo)準(zhǔn)。采用零中頻架構(gòu)，調(diào)制方式為PR-ASK調(diào)制，基帶電路由單片機(jī)、FPGA和數(shù)模轉(zhuǎn)換芯片組成。此外，還對(duì)基帶電路的現(xiàn)場(chǎng)可編程門陣列芯片（FPGA）程序進(jìn)行了設(shè)計(jì)，設(shè)計(jì)實(shí)現(xiàn)了包括PIE編碼程序和數(shù)模轉(zhuǎn)換芯片配置程序在內(nèi)的相關(guān)設(shè)計(jì)。最后，對(duì)閱讀器模塊電路以及整機(jī)進(jìn)行了測(cè)試驗(yàn)證，提出了改進(jìn)意見，為后續(xù)設(shè)計(jì)工作提供參考。 文中所述閱讀器系統(tǒng)的FPGA程序采用Quartus II9.1軟件進(jìn)行設(shè)計(jì)。經(jīng)過(guò)多次設(shè)計(jì)與調(diào)試之后，實(shí)現(xiàn)了預(yù)想的功能。經(jīng)過(guò)測(cè)試，閱讀器能夠成功識(shí)別相應(yīng)的電子標(biāo)簽。實(shí)測(cè)結(jié)果表明，該閱讀器工作性能良好，工作狀態(tài)穩(wěn)定，符合設(shè)計(jì)標(biāo)準(zhǔn)。
[Abstract]:In recent years, the Internet of things has been identified as one of China's strategic emerging industries, as one of the most critical technologies. Radio Frequency Identification. RFID (Radio Frequency Identification) is a kind of bidirectional data communication, which must be expanded with the development of the Internet of things. Radio frequency identification (RFID) technology can get the relevant data information through wireless electromagnetic wave signal. UHF (UHF) radio frequency identification (RFID) technology has many advantages such as long communication distance and the ability to identify moving targets, so it has been widely used in logistics management. Access control and other areas requiring rapid processing and data collection, especially in the future business supply chain market prospects. The main work of this paper is as follows: The communication protocol standard based on radio frequency identification technology and UHF radio frequency identification technology. The modulation mode and baseband signal stipulated in the international standard protocol are analyzed and studied from the spectrum analysis, and the bilateral band amplitude keying (DSB-ASK) is compared and analyzed. The modulation method and signal spectrum of single sideband amplitude keying modulation (SSB-ASK) and inverse phase amplitude keying modulation (PR-ASK) are analyzed. The feasibility and difficulty of application of residual sideband modulation in RFID system are discussed. After analyzing and discussing, the hardware platform of UHF RFID reader is built, which conforms to the standard of ISO18000-6C protocol. It adopts zero-intermediate frequency architecture, and the modulation mode is PR-ASK modulation. The baseband circuit is composed of MCU FPGA and digital-analog conversion chip. In addition, the FPGA program of the baseband circuit is designed. Design and implementation of the design including PIE coding program and digital-to-analog conversion chip configuration program. Finally, the reader module circuit and the whole machine are tested and verified, and the improvement suggestions are put forward. It provides reference for further design work. The FPGA program of the reader system described in this paper is designed by Quartus II9.1 software. After many design and debugging, the desired function is realized and tested. The reader can identify the corresponding electronic tags successfully. The experimental results show that the reader has good performance, stable working state and meets the design standard.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TP391.44

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本文編號(hào)：1469500