本文選題：全球?qū)Ш叫l(wèi)星系統(tǒng) + 干擾類型��； 參考：《蘭州交通大學(xué)》2017年碩士論文

【摘要】：全球?qū)Ш叫l(wèi)星系統(tǒng)發(fā)展到現(xiàn)在,在各個領(lǐng)域都廣泛的應(yīng)用。隨著無線電技術(shù)的快速發(fā)展,很多行業(yè)都被規(guī)劃了特定的頻段,另外一些民用產(chǎn)業(yè)擅自使用頻段,造成如今的電磁環(huán)境非常復(fù)雜。相互之間造成的各種干擾,以及一些有意或者無意間的人為干擾對全球衛(wèi)星導(dǎo)航系統(tǒng)的正常工作產(chǎn)生了很大的影響。研究干擾問題在全球衛(wèi)星導(dǎo)航系統(tǒng)的領(lǐng)域中越來越受人重視,但是,由于我國在北斗系統(tǒng)方面的起步較晚,而國外又對干擾方面研究的部分資源加以保密,使得我國在該領(lǐng)域很多問題還在起跑階段。本論文鑒于此主要做以下工作:首先,對全球衛(wèi)星導(dǎo)航系統(tǒng)的組成、基本原理、信號易受干擾的因素等基本知識點進行了研究和分析。鑒于我國主要使用的衛(wèi)星導(dǎo)航系統(tǒng)是GPS和北斗系統(tǒng),文中主要討論和介紹的導(dǎo)航系統(tǒng)是GPS和北斗系統(tǒng)。其次,主要針對干擾檢測技術(shù)和干擾識別技術(shù)進行研究,對一般常見的基本干擾信號進行了研究,并在Matlab上對各種干擾信號進行了仿真,分析這些干擾信號的區(qū)別和一些特征參數(shù),建立起相應(yīng)的干擾數(shù)據(jù)集,方便在受到干擾時,可以快速、有效鑒別干擾信號的具體種類。最后,針對門限閾值的限定,本文提出了門限循環(huán)更新算法,可以提高低干噪比情況下的干擾檢測效率。傳統(tǒng)的干擾監(jiān)測容易出現(xiàn)對干擾信號的漏警或者對非干擾信號過高虛警的問題,考慮到易出現(xiàn)的漏警以及虛警等問題,本文提出的雙門限閾值并且結(jié)合門限循環(huán)更新,可以有效減少漏警率和降低虛警概率。Matlab仿真證明了該算法的正確性和可行性,提高了干擾監(jiān)測的效率。
[Abstract]:Global Navigation Satellite system (GNSS) has been widely used in many fields. With the rapid development of radio technology, many industries have been planned a specific frequency band, other civil industries use frequency bands without authorization, resulting in a very complex electromagnetic environment today. All kinds of interference caused by each other, as well as some intentional or accidental human interference, have a great impact on the normal operation of global satellite navigation system. More and more attention has been paid to the study of jamming in the field of global satellite navigation system. However, due to the late start of Beidou system in China, some resources of jamming research are kept secret in foreign countries. Make our country in this field a lot of problems are still in the starting stage. The main work of this thesis is as follows: firstly, the basic knowledge of the global satellite navigation system, such as the composition, the basic principle, the interference factors and so on, are studied and analyzed. In view of the fact that the main satellite navigation system used in China is GPS and Beidou system, GPS and Beidou system are the main navigation systems discussed and introduced in this paper. Secondly, the interference detection technology and the interference identification technology are studied, and the common basic jamming signals are studied, and the various jamming signals are simulated on Matlab. By analyzing the difference of these interference signals and some characteristic parameters, the corresponding interference data set is established, so that the specific types of interference signals can be quickly and effectively identified in the event of interference. Finally, aiming at the threshold limitation, a threshold cyclic updating algorithm is proposed, which can improve the interference detection efficiency in the case of low signal-to-noise ratio. The traditional interference monitoring is prone to the problem of false alarm or high false alarm to the interference signal. Considering the problems such as false alarm and false alarm, the double threshold proposed in this paper is updated in combination with the threshold cycle. It can effectively reduce the false alarm rate and false alarm probability. MATLAB simulation shows that the algorithm is correct and feasible, and improves the efficiency of interference monitoring.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN967.1

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本文編號：1989391