本文選題：聲學(xué)釋放器 + 擴(kuò)頻通信��； 參考：《浙江大學(xué)》2014年碩士論文

【摘要】：海洋的形成是地球生命起源不可或缺的條件,經(jīng)過億萬年積淀的海洋中蘊(yùn)含著豐富的生物資源、礦藏資源和水文資源。隨著科學(xué)技術(shù)的發(fā)展和陸地上資源、能源的大量消耗,蘊(yùn)藏著豐富資源的海洋日益成為人類研究開發(fā)的對象,海洋高新技術(shù)發(fā)展也實(shí)現(xiàn)了長足飛躍。聲學(xué)釋放器作為水下科學(xué)儀器搜尋、救助和打撈的重要設(shè)備,在海洋科學(xué)、工程和軍事領(lǐng)域具有廣泛需求和應(yīng)用。聲學(xué)釋放器通信模塊是實(shí)現(xiàn)聲學(xué)釋放器水上、水下分機(jī)間聲學(xué)通信的功能模塊,研究高性能的水聲通信模塊對實(shí)現(xiàn)聲學(xué)釋放器的可靠性和安全性具有重要意義。 第一章,首先介紹了聲學(xué)釋放器及其通信模塊的研究背景、研究意義和重要性。然后以國內(nèi)外研究文獻(xiàn)和專利為基礎(chǔ),介紹了聲學(xué)釋放器的國內(nèi)外發(fā)展現(xiàn)狀和研究趨勢。最后闡述了本文的主要研究內(nèi)容。 第二章,首先介紹了聲學(xué)釋放器的工作原理和基本工作流程,討論了聲學(xué)釋放器的工作狀態(tài)和失效形式,闡明聲學(xué)釋放器通信模塊設(shè)計(jì)的重要性。接著,介紹了水聲通信的基本原理和重要特性。然后,介紹了水聲通信數(shù)字調(diào)制技術(shù),描述了幾種常用數(shù)字調(diào)制技術(shù)的原理和特點(diǎn)；并分析了它們在水聲通信中的適用性,為聲學(xué)釋放器通信模塊選擇了適合的調(diào)制方法。最后,介紹了擴(kuò)頻通信技術(shù),包括基本概念、特點(diǎn)、分類及擴(kuò)頻序列,并確定了聲學(xué)釋放器通信模塊的設(shè)計(jì)方向。 第三章,介紹了零相關(guān)區(qū)序列的概念與數(shù)學(xué)定義,并介紹了一種基于互補(bǔ)序列的零相關(guān)區(qū)序列集的構(gòu)造方法。利用這種構(gòu)造方法,構(gòu)造了一個(gè)長度為64的零相關(guān)區(qū)序列集,對該序列集的4條零相關(guān)區(qū)序列的周期自相關(guān)特性和周期互相關(guān)特性進(jìn)行分析,求解其零相關(guān)域的長度,并得到了與理論相符的結(jié)果,驗(yàn)證了零相關(guān)區(qū)序列作為直接序列擴(kuò)頻通信系統(tǒng)擴(kuò)頻碼的可行性和優(yōu)點(diǎn)。 第四章,根據(jù)水聲信道的特征,基于QPSK調(diào)制的直接序列擴(kuò)頻技術(shù)和以零相關(guān)區(qū)序列為擴(kuò)頻序列,對聲學(xué)釋放器通信模塊的發(fā)送端和接收端做了理論推導(dǎo)并構(gòu)建了通信模塊模型。然后借助matlab,對設(shè)計(jì)的通信模塊模型進(jìn)行編程和仿真,觀察其誤碼率情況,并將它與其它水聲通信方案進(jìn)行仿真比較。驗(yàn)證了該模型具有較低的復(fù)雜度,且具有較高的可靠性和較強(qiáng)的安全性。 第五章,通過搭建實(shí)驗(yàn),對聲學(xué)釋放器通信模塊在水池水聲信道中的收發(fā)效果進(jìn)行測試。介紹了實(shí)驗(yàn)的準(zhǔn)備和參數(shù)設(shè)定,對實(shí)驗(yàn)的載波調(diào)制、碼元同步、信道估計(jì)及信噪比計(jì)算等關(guān)鍵處理方法做了介紹和分析。最后,通過對實(shí)驗(yàn)結(jié)果的分析,驗(yàn)證了設(shè)計(jì)的通信模塊在水池水聲信道中發(fā)送和接收,具有較低的誤碼率和較高的可靠性和安全性,表現(xiàn)出了優(yōu)秀的性能。
[Abstract]:The formation of the ocean is an indispensable condition for the origin of life on the earth. After billions of years of accumulation, the ocean contains abundant biological resources, mineral resources and hydrological resources. With the development of science and technology, land resources and energy consumption, the ocean, which is rich in resources, has increasingly become the object of human research and development, and the development of marine high and new technology has also achieved a great leap forward. As an important equipment for searching, rescuing and salvaging underwater scientific instruments, acoustic release devices are widely needed and applied in marine science, engineering and military fields. Acoustic transmitter communication module is a functional module to realize acoustic communication between underwater and underwater extensions. It is of great significance to study the high performance underwater acoustic communication module to realize the reliability and safety of acoustic transmitter. In the first chapter, the research background, significance and importance of acoustic emitter and its communication module are introduced. Then, based on the domestic and international research literature and patents, the present situation and research trend of acoustic release devices are introduced at home and abroad. Finally, the main research contents of this paper are described. In the second chapter, the working principle and flow chart of the acoustic release device are introduced, the working state and failure form of the acoustic release device are discussed, and the importance of the design of the communication module of the acoustic release device is expounded. Then, the basic principle and important characteristics of underwater acoustic communication are introduced. Then, the digital modulation technology of underwater acoustic communication is introduced, the principle and characteristics of several commonly used digital modulation techniques are described, their applicability in underwater acoustic communication is analyzed, and the suitable modulation method is selected for the acoustic transmitter communication module. Finally, the spread spectrum communication technology is introduced, including the basic concept, characteristics, classification and spread spectrum sequence, and the design direction of the communication module of the acoustic transmitter is determined. In chapter 3, the concept and mathematical definition of zero correlation region sequence are introduced, and a construction method of zero correlation region sequence set based on complementary sequence is introduced. By using this construction method, a set of zero correlation region sequences with length 64 is constructed. The periodic autocorrelation and periodic cross-correlation characteristics of four zero correlation region sequences of the sequence set are analyzed, and the length of the zero correlation domain is solved. The results agree with the theory and verify the feasibility and advantages of the zero-correlation region sequence as the spread code of the direct sequence spread spectrum communication system. In chapter 4, according to the characteristics of underwater acoustic channel, based on the direct sequence spread spectrum technology of QPSK modulation and the zero-correlation region sequence as the spread spectrum sequence, the transmitter and receiver of the acoustic transmitter communication module are theoretically deduced and the communication module model is constructed. Then the communication module model is programmed and simulated by MATLAB, and the BER is observed and compared with other underwater acoustic communication schemes. It is verified that the model has lower complexity, higher reliability and stronger security. In chapter 5, the effect of acoustic transmitter communication module in underwater acoustic channel is tested. The preparation and parameter setting of the experiment are introduced, and the key processing methods such as carrier modulation, symbol synchronization, channel estimation and SNR calculation are introduced and analyzed. Finally, through the analysis of the experimental results, it is verified that the designed communication module has low bit error rate, high reliability and security, and shows excellent performance in the underwater acoustic channel.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TB565

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