發(fā)布時(shí)間：2018-11-25 17:58

【摘要】：隨著經(jīng)濟(jì)全球化的發(fā)展,各國(guó)貿(mào)易的不斷增加,船舶數(shù)量也越來越多,海上交通運(yùn)輸越來越繁忙,對(duì)海域進(jìn)行有效的海上實(shí)時(shí)監(jiān)控變得越來越重要。星載AIS系統(tǒng)是將AIS接收信號(hào)設(shè)備搭載到衛(wèi)星上,通過衛(wèi)星接收和處理信號(hào)。由于星載AIS系統(tǒng)其接收信號(hào)覆蓋范圍廣、實(shí)時(shí)性高等優(yōu)點(diǎn),近年來受各國(guó)海事部門的關(guān)注。信息全球化是國(guó)際上的趨勢(shì),中國(guó)想要在信息革命中掌握話語權(quán),就必須在領(lǐng)域中作出突出的貢獻(xiàn),星載AIS就是一個(gè)很好的突破口。但是,中國(guó)對(duì)于星載AIS的研究起步比較晚,離西方發(fā)達(dá)國(guó)家有一定的距離,想要趕上和超過西方發(fā)達(dá)國(guó)家,還需要在研發(fā)中投入更多,同時(shí)需要提高研發(fā)的效率。眾所周知,平臺(tái)化的研究是提高研究效率的重要突破口,所以本文從星載AIS平臺(tái)研究入手,設(shè)計(jì)并實(shí)現(xiàn)了星載AIS仿真平臺(tái)。首先,本文對(duì)星載AIS系統(tǒng)進(jìn)行了簡(jiǎn)單的闡述,介紹了星載AIS系統(tǒng)的研究狀況,從研究狀況入手,分析并說明了星載AIS仿真平臺(tái)的研究的重要意義。然后,對(duì)星載AIS仿真平臺(tái)中的相關(guān)技術(shù)背景做了簡(jiǎn)單的介紹,主要說明了 AIS信號(hào)的生成,其中包括AIS信號(hào)的規(guī)范,時(shí)分多址接入以及GMSK調(diào)制技術(shù)的相關(guān)實(shí)現(xiàn),其次介紹了星載AIS的解調(diào)技術(shù),其中包括同步頭的尋找算法,沖突信號(hào)分離算法以及GMSK的相關(guān)解調(diào)算法。緊接著,分析了星載AIS仿真平臺(tái)的相關(guān)需求,從研究者的角度,利用軟件工程的相關(guān)方法對(duì)仿真平臺(tái)進(jìn)行需求分析,利用相關(guān)的使用場(chǎng)景,對(duì)需求進(jìn)行細(xì)致的分析。接下來,論文介紹了 Matlab GUI平臺(tái)的使用,著重分析了星載AIS仿真平臺(tái)的三個(gè)重要模塊的實(shí)現(xiàn)過程:星載AIS模擬源模塊,信號(hào)解調(diào)模塊,以及信號(hào)分析模塊。對(duì)模擬源的進(jìn)度生成,信號(hào)分析模塊中的時(shí)隙沖突顯示等功能進(jìn)行了著重分析。最后通過四天線仿真算法的添加來驗(yàn)證仿真平臺(tái)的效率。利用星載AIS模擬源生成四天線仿真的源信號(hào),給解調(diào)器模塊添加四天線仿真算法,使用解調(diào)器選擇四天線解調(diào)算法對(duì)信號(hào)源進(jìn)行解調(diào),最后利用信號(hào)分析模塊分析算法性能,以及與其他數(shù)據(jù)的對(duì)比。
[Abstract]:With the development of economic globalization, the number of ships is increasing and the number of ships is increasing, so it is more and more important to monitor the sea area in real time. The spaceborne AIS system carries the AIS receiving signal equipment to the satellite, receives and processes the signal through the satellite. Spaceborne AIS system has attracted the attention of maritime departments in recent years because of its wide range of received signals and high real-time performance. Information globalization is an international trend. If China wants to master the right of speech in the information revolution, it must make outstanding contributions in the field. Spaceborne AIS is a good breakthrough. However, the research on spaceborne AIS in China started relatively late, and there is a certain distance from the western developed countries. In order to catch up with and surpass the western developed countries, we still need to invest more in R & D and improve the efficiency of R & D at the same time. As we all know, platform-based research is an important breakthrough to improve the efficiency of research, so this paper starts with the research of spaceborne AIS platform, and designs and implements the spaceborne AIS simulation platform. Firstly, this paper briefly describes the spaceborne AIS system, introduces the research status of spaceborne AIS system, analyzes and explains the significance of the research of spaceborne AIS simulation platform from the point of view of the research status. Then, the related technical background of spaceborne AIS simulation platform is briefly introduced, which mainly explains the generation of AIS signal, including the specification of AIS signal, time division multiple access (TDMA) and the related realization of GMSK modulation technology. Secondly, the demodulation technology of spaceborne AIS is introduced, which includes synchronous head searching algorithm, collision signal separation algorithm and GMSK demodulation algorithm. Then, the related requirements of spaceborne AIS simulation platform are analyzed. From the perspective of researchers, the software engineering methods are used to analyze the requirements of the simulation platform, and the related usage scenarios are used to analyze the requirements carefully. Then, the paper introduces the use of Matlab GUI platform, focusing on the analysis of the implementation process of three important modules of spaceborne AIS simulation platform: spaceborne AIS analog source module, signal demodulation module, and signal analysis module. The functions of generating the analog source and displaying the time slot conflict in the signal analysis module are analyzed emphatically. Finally, the efficiency of the simulation platform is verified by adding four antenna simulation algorithms. The four antenna simulation algorithm is added to the demodulator module, the demodulator selects four antennas demodulation algorithm to demodulate the signal source, and the signal analysis module is used to analyze the performance of the algorithm. And the comparison with other data.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U675.7;TP391.9

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本文編號(hào)：2356960