用于分布式RFID系統(tǒng)的光收發(fā)模塊及天線控制電路設(shè)計與實現(xiàn)
[Abstract]:RFID (Radio Frequency Identification) technology is a kind of contactless automatic identification technology. It has attracted extensive attention and research because of its large data storage capacity and support for remote identification. However, the explosive growth of data information puts forward higher and higher requirements for RFID system. The traditional RFID system has a limited reading range and needs a large number of readers to cover the RFID signal in a large area. There are some inherent blind areas in the system, and the probability of successfully reading the tags in the blind area is greatly reduced. Thus, the accuracy of the whole RFID system is reduced. All these limit the application of traditional RFID system in the scene with large coverage and high label density. In this paper, a new distributed optical-borne RFID system is studied. The system combines distributed RoF (Radio over Fiber) technology with RFID technology, and makes use of the characteristic of low transmission loss of optical fiber communication, extends the RFID signal, improves the effective coverage of a single reader, and contributes to the centralized control of multiple readers at the same time. The system adopts antenna switching method to improve the reading accuracy of the system. By changing the pairing mode of transmitting antenna and receiving antenna, the position of blind area in RFID system is changed, and an equivalent blind-free RFID system is constructed. In this paper, an optical transceiver module for ultra-high frequency (UHF) optical carrier RFID system is designed. The typical operating frequency band is 902MHz / 928MHz. Compared with the complex broadband optical module, it has the advantages of simple structure, low cost and easy integration. The design of the optical module downlink RF transmission power can reach up to 30 dBm, and can be adjusted according to the need; The uplink gain OdB, outputs a third-order cut-off point of 20 dBm with no spurious dynamic range of 105.8dB 路Hz2 / 3, which meets the needs of RFID systems. In this paper, an antenna switching controller is designed to control the matching state of receiving and transmitting antennas. The antenna switching part is realized by radio frequency switch. Insertion loss is small, 1.6 dB, isolation is high, each way isolation is higher than 54 dB. The switching control part is realized based on the FPGA minimum system, and the functions of communicating with the host computer and controlling the switching state of the antenna are completed. The flexible configuration of parameters such as antenna switching time interval and transmit and receive antenna switching sequence can be realized by sending instructions from host computer. After practical testing, the RFID system using antenna switching controller can improve reading accuracy by about 15%.
【學(xué)位授予單位】:北京郵電大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號】:TP391.44
【參考文獻(xiàn)】
相關(guān)期刊論文 前6條
1 蔡小明;;光通信設(shè)備產(chǎn)業(yè)的發(fā)展[J];中國新通信;2012年22期
2 胡寶寶;石巖;;物聯(lián)網(wǎng)環(huán)境下廢棄物物流的發(fā)展與思考[J];物流技術(shù);2011年17期
3 石亞萍;;物聯(lián)網(wǎng)現(xiàn)狀分析與發(fā)展探討[J];商場現(xiàn)代化;2011年17期
4 李中民;;我國物聯(lián)網(wǎng)發(fā)展現(xiàn)狀及策略[J];計算機(jī)時代;2011年03期
5 黃嘉明;陳舜兒;劉偉平;黃紅斌;;RoF技術(shù)分析及其應(yīng)用[J];光纖與電纜及其應(yīng)用技術(shù);2007年02期
6 周波;張漢一;鄭小平;陳銳;;微波光子學(xué)發(fā)展動態(tài)[J];激光與紅外;2006年02期
相關(guān)博士學(xué)位論文 前1條
1 李建強(qiáng);基于鈮酸鋰調(diào)制器的微波光子信號處理技術(shù)與毫米波頻段ROF系統(tǒng)設(shè)計[D];北京郵電大學(xué);2009年
相關(guān)碩士學(xué)位論文 前10條
1 李深安;基于物聯(lián)網(wǎng)網(wǎng)關(guān)的智能家居系統(tǒng)室內(nèi)定位技術(shù)研究[D];北京郵電大學(xué);2015年
2 李聯(lián)冠;基于LED的室內(nèi)可見光通信系統(tǒng)的研制[D];南京郵電大學(xué);2014年
3 楊靖治;GaAs MOSFET射頻開關(guān)器件與電路的研究[D];西安電子科技大學(xué);2014年
4 劉玉偉;基于RFID技術(shù)的手持式讀寫器的研究與設(shè)計[D];南京理工大學(xué);2014年
5 孫永來;基于FPGA控制的串行通信接口設(shè)計與實現(xiàn)[D];中國科學(xué)院大學(xué)(工程管理與信息技術(shù)學(xué)院);2014年
6 湯兆星;寬帶低成本模擬光收發(fā)模塊設(shè)計與光載無線系統(tǒng)應(yīng)用[D];北京郵電大學(xué);2013年
7 龔志山;光載無線RoF系統(tǒng)動態(tài)特性研究與系統(tǒng)優(yōu)化設(shè)計[D];北京郵電大學(xué);2013年
8 楊恒;射頻識別(RFID)防碰撞算法研究[D];西南石油大學(xué);2012年
9 蘇暉;射頻識別防碰撞算法研究[D];重慶大學(xué);2012年
10 趙龍;物聯(lián)網(wǎng)中RFID數(shù)據(jù)的壓縮存儲及其查詢[D];沈陽航空航天大學(xué);2012年
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