【摘要】：隨著衛(wèi)星導(dǎo)航技術(shù)的不斷進(jìn)步和對(duì)地觀測(cè)遙感技術(shù)的發(fā)展,不斷有新的導(dǎo)航系統(tǒng)和雷達(dá)衛(wèi)星上線,機(jī)場(chǎng)等地的各種測(cè)距設(shè)施與個(gè)人無(wú)線電設(shè)備持續(xù)運(yùn)行,各類系統(tǒng)在頻譜上的交疊更加普遍,不同系統(tǒng)之間的兼容性問題日益突出。北斗導(dǎo)航系統(tǒng)作為該類系統(tǒng)中的一部分,也面臨著各類射頻干擾的威脅。由此可見,北斗導(dǎo)航系統(tǒng)的射頻干擾的兼容性問題非常值得研究。本文首先簡(jiǎn)述了論文研究的背景狀況以及當(dāng)前的發(fā)展動(dòng)態(tài),然后對(duì)北斗導(dǎo)航系統(tǒng)的定位原理以及北斗導(dǎo)航信號(hào)的生成方式做了說(shuō)明。同時(shí)對(duì)新型的BOC信號(hào)的生成方式進(jìn)行了說(shuō)明,對(duì)BOC調(diào)制的時(shí)頻結(jié)構(gòu)進(jìn)行分析,總結(jié)了BOC的特點(diǎn)及優(yōu)勢(shì)。本文設(shè)計(jì)了基于北斗導(dǎo)航的軟件接收機(jī)平臺(tái),同時(shí)兼容傳統(tǒng)調(diào)制信號(hào)和新型的BOC調(diào)制信號(hào),對(duì)傳統(tǒng)的調(diào)制信號(hào)的捕獲和跟蹤方式進(jìn)行介紹。同時(shí)對(duì)于新型的BOC調(diào)制信號(hào)采用了不同于PSK信號(hào)的捕獲和跟蹤方式并進(jìn)行改進(jìn)。接下來(lái)對(duì)接收機(jī)性能的指標(biāo)進(jìn)行了討論,從接收機(jī)不同工作階段的工作情況進(jìn)行了評(píng)估,提出了利用跟蹤精度來(lái)表征接收機(jī)性能的方法。對(duì)不同的接收機(jī)類型以及接收機(jī)中射頻干擾的評(píng)估標(biāo)準(zhǔn)進(jìn)行了闡述,對(duì)集總的射頻干擾評(píng)估標(biāo)準(zhǔn)進(jìn)行推導(dǎo)。給出了接收機(jī)在潛在的兩種射頻干擾背景下的性能仿真。同時(shí)本文從射頻干擾原理角度分析,對(duì)現(xiàn)有的評(píng)估標(biāo)準(zhǔn)實(shí)施改進(jìn)并進(jìn)行了仿真驗(yàn)證。本文同時(shí)給出了實(shí)物驗(yàn)證的驗(yàn)證方案。最后提出了利用頻域消隱技術(shù)提高接收機(jī)抗干擾能力的方法,同時(shí)對(duì)該方法進(jìn)行闡述并在BOC調(diào)制的條件下進(jìn)行仿真并得出仿真結(jié)果。最后比較時(shí)域消隱和頻域消隱的特點(diǎn),給出了綜合消隱接收機(jī)的方案。
[Abstract]:With the continuous progress of satellite navigation technology and the development of remote sensing technology for earth observation, there are new navigation systems and radar satellites on line, various ranging facilities and personal radio equipment in places such as airports and other places continue to operate. The overlapping of all kinds of systems in the spectrum is more common, and the compatibility between different systems is becoming more and more serious. Beidou navigation system, as a part of the system, also faces the threat of various RF interference. It can be seen that the compatibility of radio frequency interference in Beidou navigation system is worth studying. In this paper, the background and the current development of the research are briefly introduced, and then the positioning principle of the Beidou navigation system and the generating method of the Beidou navigation signal are explained. At the same time, the new generation mode of BOC signal is explained, the time-frequency structure of BOC modulation is analyzed, and the characteristics and advantages of BOC are summarized. In this paper, a software receiver platform based on Beidou navigation is designed, which is compatible with both the traditional modulation signal and the new BOC modulation signal. The acquisition and tracking method of the traditional modulation signal is introduced. At the same time, the acquisition and tracking of the new BOC modulation signal is different from that of the PSK signal and improved. Then the performance index of the receiver is discussed and the performance of the receiver is evaluated at different working stages. A method of using tracking accuracy to characterize the performance of the receiver is proposed. The different types of receiver and the evaluation standard of RF interference in receiver are expounded, and the evaluation standard of lumped RF interference is deduced. The performance simulation of the receiver under the background of two potential radio frequency interference is given. At the same time, from the point of view of RF interference theory, the existing evaluation standards are improved and verified by simulation. At the same time, the verification scheme of physical verification is given. Finally, a method of improving the anti-jamming ability of the receiver by frequency domain blanking technique is proposed. The method is described and simulated under the condition of BOC modulation and the simulation results are obtained. Finally, the characteristics of time domain blanking and frequency domain blanking are compared, and the scheme of integrated blanking receiver is presented.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN967.1

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本文編號(hào)：2357231