本文選題：衛(wèi)星導(dǎo)航信號(hào)模擬源 + 可見(jiàn)衛(wèi)星　； 參考：《西安電子科技大學(xué)》2014年碩士論文

【摘要】：衛(wèi)星導(dǎo)航是一種采用導(dǎo)航衛(wèi)星對(duì)在地面、海洋和天空中運(yùn)行的載體進(jìn)行導(dǎo)航定位的技術(shù)。它能提供高精度的三維位置信息、精準(zhǔn)的時(shí)間信息和速度信息,在民用和軍事領(lǐng)域得到了廣泛的應(yīng)用�，F(xiàn)今,導(dǎo)航產(chǎn)品的研發(fā)方興未艾,急需能夠模擬導(dǎo)航信號(hào)的衛(wèi)星導(dǎo)航信號(hào)模擬源,以提供實(shí)驗(yàn)和仿真數(shù)據(jù)。導(dǎo)航信號(hào)模擬源的研究不僅可以使我們更加準(zhǔn)確地認(rèn)識(shí)導(dǎo)航信號(hào)的結(jié)構(gòu),而且可以為導(dǎo)航接收機(jī)等導(dǎo)航終端設(shè)備的研制提供輔助手段,在衛(wèi)星導(dǎo)航產(chǎn)品的研究中是一個(gè)不可或缺的環(huán)節(jié)。本文對(duì)衛(wèi)星導(dǎo)航信號(hào)模擬源的設(shè)計(jì)做了相當(dāng)程度的研究。本文首先介紹了課題研究的背景、意義和現(xiàn)狀,概述了全球四大衛(wèi)星導(dǎo)航系統(tǒng)的基本情況,全面介紹了衛(wèi)星導(dǎo)航涉及到的必備知識(shí):導(dǎo)航系統(tǒng)的空間坐標(biāo)系、導(dǎo)航衛(wèi)星的空間星座分布、導(dǎo)航衛(wèi)星的運(yùn)行軌道和運(yùn)行周期、導(dǎo)航數(shù)據(jù)的構(gòu)成和衛(wèi)星導(dǎo)航系統(tǒng)的工作原理。其次,介紹了衛(wèi)星導(dǎo)航信號(hào)模擬源的整體組成結(jié)構(gòu)、功能和工作原理以及上位機(jī)和下位機(jī)之間的通信接口,上位機(jī)的PC端是由VS2008開(kāi)發(fā)的一個(gè)基于單文檔的MFC工程,為了實(shí)現(xiàn)界面的簡(jiǎn)單和操作的簡(jiǎn)潔,將全部功能設(shè)計(jì)集中到了一個(gè)模態(tài)對(duì)話框上面,整個(gè)對(duì)話框接受唯一的參數(shù)輸入,即地面某點(diǎn)的經(jīng)緯度,然后根據(jù)這個(gè)輸入的參數(shù)來(lái)產(chǎn)生對(duì)應(yīng)的空間坐標(biāo),顯示此地此時(shí)的可見(jiàn)衛(wèi)星編號(hào),根據(jù)需要生成特定衛(wèi)星的導(dǎo)航數(shù)據(jù),并將生成的導(dǎo)航數(shù)據(jù)通過(guò)PCIE總線發(fā)送到硬件部分,硬件部分是由ML605開(kāi)發(fā)板為主體的專用平臺(tái)并配合著ISE14.5開(kāi)發(fā)工具實(shí)現(xiàn)的,主要用來(lái)接收來(lái)自上位機(jī)的導(dǎo)航數(shù)據(jù)并對(duì)它們進(jìn)行調(diào)制,將調(diào)制之后的導(dǎo)航數(shù)據(jù)發(fā)送到AD9739,AD9739在混頻模式下將導(dǎo)航信號(hào)發(fā)送出去。然后,詳細(xì)介紹了上位機(jī)部分各功能的設(shè)計(jì)和實(shí)現(xiàn)思路并對(duì)主要的功能模塊進(jìn)行了測(cè)試和驗(yàn)證,主要包括以下內(nèi)容:根據(jù)輸入地面某點(diǎn)的經(jīng)緯度顯示其對(duì)應(yīng)的三維坐標(biāo)的設(shè)計(jì)思路,并對(duì)其進(jìn)行了功能驗(yàn)證和結(jié)果測(cè)試;根據(jù)輸入的地面某點(diǎn)經(jīng)緯度來(lái)顯示該地點(diǎn)處可見(jiàn)衛(wèi)星編號(hào)的設(shè)計(jì)思路,并對(duì)其進(jìn)行了功能驗(yàn)證和結(jié)果測(cè)試;顯示系統(tǒng)日期和時(shí)間的設(shè)計(jì)思路;根據(jù)系統(tǒng)時(shí)間動(dòng)態(tài)刷新可見(jiàn)衛(wèi)星編號(hào)的設(shè)計(jì)思路,并對(duì)其進(jìn)行了功能驗(yàn)證和結(jié)果測(cè)試;導(dǎo)航信號(hào)的數(shù)據(jù)幀格式及其在軟件中的數(shù)據(jù)結(jié)構(gòu)的設(shè)計(jì)思路,并對(duì)導(dǎo)航數(shù)據(jù)的正確性進(jìn)行了測(cè)試和驗(yàn)證;上位機(jī)和下位機(jī)通信接口的設(shè)計(jì)思路等。最后,詳細(xì)介紹了下位機(jī)部分各個(gè)模塊的設(shè)計(jì)思路和實(shí)現(xiàn)方法,并對(duì)核心功能模塊進(jìn)行了功能驗(yàn)證,主要包括以下內(nèi)容:PCIE模塊的實(shí)現(xiàn)方法;FIFO模塊的實(shí)現(xiàn)方法;BPSK模塊的實(shí)現(xiàn)方法,并對(duì)其進(jìn)行了功能驗(yàn)證和結(jié)果測(cè)試;AD9739模塊的實(shí)現(xiàn)方法;對(duì)導(dǎo)航信號(hào)的結(jié)果進(jìn)行了仿真和實(shí)現(xiàn)。
[Abstract]:Satellite navigation is a kind of navigation technology which uses navigation satellites to locate the carriers running on the ground, sea and sky. It can provide high precision 3D position information, accurate time information and speed information, and has been widely used in civil and military fields. Nowadays, the research and development of navigation products is in the ascendant, and the satellite navigation signal analog source which can simulate navigation signal is urgently needed to provide experimental and simulation data. The research of navigation signal analog source can not only make us understand the structure of navigation signal more accurately, but also provide auxiliary means for the development of navigation terminal equipment such as navigation receiver. It is an indispensable link in the research of satellite navigation products. In this paper, the design of satellite navigation signal analog source is studied to a certain extent. This paper first introduces the background, significance and present situation of the research, summarizes the basic situation of the four major satellite navigation systems in the world, and comprehensively introduces the necessary knowledge of satellite navigation: the space coordinate system of the navigation system. The spatial constellation distribution of navigation satellite, the orbit and period of navigation satellite, the constitution of navigation data and the working principle of satellite navigation system. Secondly, the whole structure, function and working principle of the analog source of satellite navigation signal and the communication interface between the upper computer and the lower computer are introduced. The PC end of the upper computer is a MFC project based on single document developed by VS2008. In order to realize the simplicity of interface and operation, the design of all functions is concentrated on one modal dialog box. The whole dialog box accepts unique parameter input, that is, latitude and longitude at a certain point on the ground. Then the corresponding spatial coordinates are generated according to the input parameters, the visible satellite numbers are displayed here at this time, the navigation data of a particular satellite is generated according to the need, and the generated navigation data is sent to the hardware via the PCIE bus. The hardware part is realized by the special platform of ML605 development board and the ISE14.5 development tool. It is mainly used to receive and modulate the navigation data from the host computer. The modulated navigation data is sent to AD9739 and the navigation signal is transmitted in mixed mode. Then, the design and realization of each function of upper computer are introduced in detail, and the main function modules are tested and verified. The main contents are as follows: according to the latitude and longitude of the input ground point, the design idea of displaying the corresponding 3D coordinate is given, and the function verification and the result test are carried out. According to the input point longitude and latitude of the ground to display the visible satellite number at the site, the design idea of showing the date and time of the system is given, and the function verification and result test of the satellite number are carried out, and the design idea of displaying the date and time of the system is given. According to the design idea of system time dynamic refresh visible satellite number, the function verification and result test are carried out, the data frame format of navigation signal and its data structure in software are designed. The correctness of navigation data is tested and verified, and the design idea of communication interface between upper computer and lower computer is presented. Finally, the design idea and realization method of each module of the lower computer are introduced in detail, and the function verification of the core function module is carried out, which includes the following contents: the realization method of the component of the PCIE module and the implementation method of the FIFO module and the implementation method of the BPSK module. The realization method of AD9739 module and the simulation and realization of the result of navigation signal are given.
【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)】：TN967.1

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