發(fā)布時間：2018-05-11 18:15

  本文選題：Galileo + 軟件接收機　； 參考：《電子科技大學(xué)》2015年碩士論文

【摘要】：隨著時代的發(fā)展,衛(wèi)星導(dǎo)航技術(shù)不斷完善和進步,無論在民用領(lǐng)域或軍事領(lǐng)域都體現(xiàn)越來越重要的作用。美國的GPS、中國的北斗、俄羅斯的GLONASS和歐洲的Galileo系統(tǒng)整合而實現(xiàn)組合導(dǎo)航已成為導(dǎo)航接收機的發(fā)展趨勢。本文主要研究Galileo軟件接收機的關(guān)鍵技術(shù),并搭建了仿真平臺,對捕獲模塊、跟蹤模塊、譯碼模塊等關(guān)鍵技術(shù)進行了理論分析和仿真驗證。本論文的主要工作包括:首先,本文對Galileo系統(tǒng)官方發(fā)布的資料進行了深入的講解,包括E1信號和E5信號的結(jié)構(gòu)等,E1信號采用了MBOC(6,1,1/11)的調(diào)制方式而E5信號采用AltBOC(15,10)的調(diào)制方式[1]。BPSK信號功率主要集中在主瓣內(nèi),而BOC信號卻集中在兩個旁瓣內(nèi),BOC調(diào)制方式實現(xiàn)了頻譜搬移。其次,針對E1和E5信號的BOC調(diào)制方式的捕獲、跟蹤關(guān)鍵技術(shù)環(huán)節(jié)進行了理論分析和仿真。E1信號的捕獲和跟蹤采用了ASPeCT處理方法對相關(guān)函數(shù)做了一定改進,改進后的相關(guān)函數(shù)旁瓣能量明顯變?nèi)�。而對E5信號則采用了單邊帶處理方式進行捕獲和跟蹤。然后,對卷積碼編碼方式進行了簡單的介紹。Galileo信號采用了(2,1,6)卷積碼的編碼方式,本文通過Viterbi算法進行譯碼,并且進行了仿真驗證,并同時驗證了卷積碼編碼方式擁有一定的糾錯能力。最后,簡單介紹了Galileo信號解幀過程以及現(xiàn)在常用的定位算法。
[Abstract]:With the development of the times, satellite navigation technology has been improved and improved, which plays an increasingly important role in both civil and military fields. Integrated navigation has become the trend of navigation receiver by integrating GPS of America, Beidou of China, GLONASS of Russia and Galileo system of Europe. In this paper, the key technologies of Galileo software receiver are studied, and the simulation platform is built. The key technologies such as capture module, tracking module and decoding module are analyzed theoretically and verified by simulation. The main work of this paper includes: firstly, this paper explains the official data of Galileo system deeply. The structure of E1 signal and E5 signal are modulated by MBOC6 / 1 / 1 / 11) and E5 signal is modulated by AltBOC1510). The power of BPSK signal is mainly concentrated in the main lobe, while the BOC signal is concentrated in two sidelobe modulation modes to realize the spectrum shift. Secondly, aiming at the acquisition of E1 and E5 signals by BOC modulation, the key techniques of tracking are analyzed theoretically, and the acquisition and tracking of emulation. E1 signals are acquired and tracked. The correlation function is improved by using ASPeCT processing method. The side lobe energy of the improved correlation function is obviously weakened. The single sideband processing is used to capture and track the E5 signal. Then, the coding method of convolutional code is simply introduced. The coding mode of the convolutional code is introduced. The Viterbi algorithm is used to decode the convolutional code, and the simulation is carried out. At the same time, it is verified that convolutional code has a certain ability of correcting errors. Finally, the unframing process of Galileo signal and the commonly used localization algorithms are briefly introduced.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN965.5
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本文編號：1875035