本文選題：水下無(wú)線可見光通信 + OFDM　； 參考：《浙江大學(xué)》2017年碩士論文

【摘要】：隨著社會(huì)的不斷發(fā)展,陸地上的資源已經(jīng)難以滿足人類日益增長(zhǎng)的物質(zhì)需求,越來(lái)越多的國(guó)家將目光聚焦于海洋。海洋不僅蘊(yùn)含著豐富的水產(chǎn)資源,而且蘊(yùn)藏著難以估計(jì)的能源等其它資源,這使得各國(guó)掠奪海洋資源的競(jìng)爭(zhēng)愈演愈烈�？茖W(xué)技術(shù)在這場(chǎng)競(jìng)爭(zhēng)中發(fā)揮著重要的作用,為了能夠?qū)崟r(shí)監(jiān)測(cè)海洋和智能開發(fā)海洋,越來(lái)越多的國(guó)家在海底布放了觀測(cè)網(wǎng)絡(luò)。在海底觀測(cè)網(wǎng)絡(luò)中,大量數(shù)據(jù)需要進(jìn)行傳輸與存儲(chǔ),與水聲、無(wú)線電通信相比較,水下無(wú)線可見光通信憑借著高速數(shù)據(jù)傳輸?shù)膬?yōu)點(diǎn)而獨(dú)樹一幟。本文分析了當(dāng)前水下通信技術(shù)的現(xiàn)狀,詳細(xì)介紹了正交頻分復(fù)用(OFDM)關(guān)鍵技術(shù)的原理。首先,利用Matlab軟件編寫發(fā)射端信號(hào)產(chǎn)生和接收端信號(hào)解調(diào)的代碼,并借助任意波形發(fā)生器和混合信號(hào)示波器驗(yàn)證了水下OFDM無(wú)線可見光通信系統(tǒng)的可行性。隨后,使用Quartus Ⅱ 11.0來(lái)編寫整個(gè)通信系統(tǒng)代碼并實(shí)現(xiàn)基于FPGA的水下無(wú)線可見光通信系統(tǒng)。主要模塊包括系統(tǒng)工作時(shí)鐘模塊、發(fā)射端控制信號(hào)模塊、長(zhǎng)短訓(xùn)練符號(hào)生成模塊、并串轉(zhuǎn)換模塊、正交幅度調(diào)制(QAM)模塊、快速傅里葉反變換模塊、加窗與循環(huán)前綴模塊、分組檢測(cè)模塊、符號(hào)同步模塊、快速傅里葉變換模塊、信道估計(jì)與均衡模塊、QAM解調(diào)模塊以及四位轉(zhuǎn)八位轉(zhuǎn)換模塊。采用ModelSim-Altera來(lái)仿真整個(gè)通信系統(tǒng),搭建了一套基于FPGA的水下OFDM無(wú)線可見光通信測(cè)試平臺(tái),并將實(shí)驗(yàn)結(jié)果與仿真結(jié)果相對(duì)比,驗(yàn)證了該系統(tǒng)能夠?qū)崿F(xiàn)通信功能。在9.375×10-3g/L的Mg(OH)2溶液中通信時(shí),整個(gè)通信系統(tǒng)的傳輸速率能夠達(dá)到80Mbps,誤碼率為2.24×10-3,傳輸距離為2米。
[Abstract]:With the development of society, the resources on land have been unable to meet the increasing material needs of human beings. More and more countries are focusing on the ocean. The ocean not only contains rich aquatic resources but also contains inestimable energy and other resources. Science and technology play an important role in this competition. In order to monitor the ocean in real time and develop the ocean intelligently, more and more countries have placed observation networks on the seabed. In the submarine observation network, a large number of data need to be transmitted and stored. Compared with underwater acoustic and radio communication, underwater wireless visible light communication is unique by virtue of the advantages of high-speed data transmission. In this paper, the present situation of underwater communication technology is analyzed, and the principle of OFDM (orthogonal Frequency Division Multiplexing) is introduced in detail. Firstly, the codes of signal generation and signal demodulation at the transmitter and receiver are compiled by Matlab software, and the feasibility of underwater OFDM wireless visible light communication system is verified by using arbitrary waveform generator and mixed signal oscilloscope. Then, Quartus 鈪，

本文編號(hào)：2027418