本文關(guān)鍵詞： GNSS BDS DOP 仿真 組合導(dǎo)航　出處：《江西理工大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：隨著現(xiàn)有的GPS、GLONASS系統(tǒng)的現(xiàn)代化，以及BDS、Galileo系統(tǒng)的建成，全球?qū)Ш叫l(wèi)星系統(tǒng)將為未來(lái)測(cè)量技術(shù)帶來(lái)新的發(fā)展。未來(lái)的全球?qū)Ш叫l(wèi)星系統(tǒng)將為用戶(hù)提供更多的衛(wèi)星和信號(hào)，以滿(mǎn)足越來(lái)越高的導(dǎo)航、定位需求。面對(duì)用戶(hù)不斷提高的需求，更小、更輕、更快、更環(huán)保的接收機(jī)就成為未來(lái)的發(fā)展趨勢(shì)。但是對(duì)于越來(lái)越多的衛(wèi)星信號(hào)和編碼數(shù)量來(lái)說(shuō)，就需要更加高效的處理技術(shù)�；诖�，本文對(duì)多星座組合衛(wèi)星導(dǎo)航系統(tǒng)的一些關(guān)鍵性問(wèn)題展開(kāi)研究。 首先，四大全球衛(wèi)星導(dǎo)航系統(tǒng)設(shè)計(jì)初衷都不盡相同，為了解這四個(gè)導(dǎo)航系統(tǒng)之間的差異。本文通過(guò)對(duì)四大導(dǎo)航系統(tǒng)星座的模擬仿真，對(duì)它們?cè)诓煌叨冉刂菇窍轮袊?guó)四個(gè)地區(qū)以及全球范圍內(nèi)的可見(jiàn)衛(wèi)星數(shù)、PDOP值和導(dǎo)航精度的統(tǒng)計(jì)數(shù)據(jù)進(jìn)行分析，得出它們?cè)诓煌闆r下的導(dǎo)航性能數(shù)據(jù)，為用戶(hù)提供參考。 其次，本文通過(guò)組合多個(gè)導(dǎo)航系統(tǒng)來(lái)解決單系統(tǒng)導(dǎo)航性能不足的問(wèn)題。而多系統(tǒng)的組合導(dǎo)航首先要解決的是數(shù)據(jù)解算時(shí)坐標(biāo)系和時(shí)間系統(tǒng)統(tǒng)一的問(wèn)題。在討論四個(gè)全球衛(wèi)星導(dǎo)航系統(tǒng)坐標(biāo)和時(shí)間系統(tǒng)之間的不同之后，提出了將坐標(biāo)系統(tǒng)統(tǒng)一到WGS-84坐標(biāo)系，時(shí)間系統(tǒng)統(tǒng)一到國(guó)際原子時(shí)的解決辦法。 然后，為了解組合衛(wèi)星導(dǎo)航系統(tǒng)的導(dǎo)航性能，本文將不同的導(dǎo)航衛(wèi)星系統(tǒng)進(jìn)行組合，模擬仿真了單星座，雙星座，三星座、四星座的四個(gè)方案，通過(guò)仿真數(shù)據(jù)分析了它們?cè)诓煌叨冉刂菇窍氯蚍秶鷥?nèi)的導(dǎo)航性能。 最后，多星座的組合使得衛(wèi)星數(shù)量大幅增加，同時(shí)也加大了數(shù)據(jù)處理的難度。在對(duì)大量的仿真數(shù)據(jù)以及前人成果的研究后，計(jì)算出在保證精度前提下的合適可見(jiàn)衛(wèi)星數(shù)量。同時(shí)針對(duì)傳統(tǒng)的選星算法效率比較低這一缺點(diǎn)，提出了改進(jìn)的選星算法，大大提高了選星的速度，，并通過(guò)仿真來(lái)驗(yàn)證了優(yōu)化算法的可行性。
[Abstract]:With the modernization of the existing GPS GLONASS system and the completion of the BDS Galileo system. GNSS will bring new development to the future measurement technology. The future GNSS will provide users with more satellites and signals to meet the increasing navigation. In the face of the increasing demand of users, smaller, lighter, faster and more environmentally friendly receivers will become the trend in the future. But for more and more satellite signals and coding quantity. Therefore, some key problems of multi-constellation integrated satellite navigation system are studied in this paper. First of all, the four major global satellite navigation system design intention is not the same, in order to understand the differences between the four navigation systems, this paper through the four navigation system constellation simulation. The statistical data of PDOP values and navigation accuracy of visible satellites in four regions of China and the whole world at different cutoff angles are analyzed and their navigation performance data under different conditions are obtained. Provide reference for users. Second. In this paper, the problem of insufficient navigation performance of single system is solved by integrating multiple navigation systems. The first problem of integrated navigation of multi-system is the unification of time coordinate system and time system. Four global problems are discussed in this paper. After the difference between the satellite navigation system coordinates and the time system. The solution of unifying the coordinate system to the WGS-84 coordinate system and the time system to the international atomic time is presented. Then, in order to understand the navigation performance of the integrated satellite navigation system, this paper combines different navigation satellite systems, and simulates the four schemes of single constellation, double constellation, Samsung constellation and four constellations. Their global navigation performance at different cutoff angles is analyzed by simulation data. Finally, the combination of multiple constellations greatly increases the number of satellites, but also increases the difficulty of data processing. At the same time, aiming at the low efficiency of traditional star selection algorithm, an improved star selection algorithm is proposed, which greatly improves the speed of star selection. The feasibility of the optimization algorithm is verified by simulation.
【學(xué)位授予單位】：江西理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：P228.4

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