本文選題：星間鏈路 + 收發(fā)信機��； 參考：《國防科學技術大學》2014年碩士論文

【摘要】：收發(fā)信機的抗干擾性能關系到星間鏈路系統(tǒng)的安全性,在高精度測距和有限星載處理能力約束下增加抗干擾環(huán)節(jié)會增加收發(fā)信機復雜度并且引入測距誤差,盲目增加抗干擾措施得不償失,定量分析擴頻測距中的天然抗窄帶干擾能力可以為在什么條件下不需要采取抗干擾措施提供決策,對優(yōu)化系統(tǒng)設計具有重要意義。擴頻天然具有一定的抗窄帶干擾能力,在干擾能量小時,擴頻自然可以抗干擾,在干擾能量大時,擴頻還是不能抗干擾,這個能量的臨界線就是本文要研究的性能限。由此產(chǎn)生了本文研究的基本問題——能否用某種量值來定量地表示擴頻測距中的抗窄帶干擾的天然能力。為此必須解決以下三個關鍵技術問題:1.擴頻測距的抗窄帶干擾性能限的定義問題。在測距優(yōu)化設計中,用什么量值作為性能限,關系到性能限的研究思路和分析方法,也決定了結(jié)論能否直接指導接收機設計決策。因此,如何定義擴頻測距的抗窄帶干擾性能限成為星間鏈路收發(fā)信機抗窄帶干擾性能限研究的關鍵技術問題。2.抗單頻干擾性能限的定量計算方法問題。單頻干擾是窄帶干擾的極限狀態(tài),窄帶信號與單頻信號具有相似的特征,因此其對測量誤差的影響是相似的�？梢韵妊芯繂晤l干擾的影響機理,從中發(fā)現(xiàn)特征與規(guī)律,作為窄帶干擾的性能限的定性認識,從中找到研究方向和解決問題的思路。因此,如何定量計算擴頻測距的抗單頻干擾性能限成為星間鏈路收發(fā)信機抗窄帶干擾性能限研究的關鍵技術問題。3.抗窄帶干擾性能限的定量確定研究問題。窄帶信號的影響很復雜,可以理解為無限多個單頻的總和。顯然抗單頻干擾性能限并非直觀可見的,所以確定抗窄帶干擾性能限是一件極其困難的事。因此,如何定量確定擴頻測距的抗窄帶干擾性能限成為星間鏈路收發(fā)信機抗窄帶干擾性能限研究的關鍵技術問題。為解決第一個關鍵技術問題,論文對擴頻測距的抗窄帶干擾性能限進行了定義;為解決第二個關鍵技術問題,論文對擴頻測距的抗單頻干擾性能限進行了定量計算;為解決第三個關鍵技術問題,論文對擴頻測距的抗窄帶干擾性能限進行了定量分析。論文以采用CSTDD信號體制的星間鏈路收發(fā)信機的抗窄帶干擾性能限為研究對象,對上述關鍵技術問題進行定量計算、分析,設計實驗測試方法和系統(tǒng),得到了一定的理論研究成果,達到了預期目的。
[Abstract]:The anti-jamming performance of transceiver relates to the security of intersatellite link system. Under the constraint of high precision ranging and limited spaceborne processing ability, increasing anti-jamming link will increase the complexity of transceiver and introduce ranging error.Blind increase of anti-jamming measures outweighs the loss. Quantitative analysis of the natural narrowband interference resistance in spread spectrum ranging can provide a decision on the conditions under which anti-jamming measures are not needed, which is of great significance to the optimization of system design.Spread spectrum has a certain ability to resist narrowband interference. When interference energy is small, spread spectrum can resist interference. When interference energy is large, spread spectrum can not resist interference. This critical line of energy is the performance limit to be studied in this paper.As a result, the basic problem studied in this paper is whether the natural ability to resist narrowband interference in spread spectrum ranging can be quantitatively expressed by a certain quantity.To this end, we must solve the following three key technical issues: 1.Definition of narrowband interference performance limits for spread spectrum ranging.In the optimal design of ranging, what value is used as the performance limit, which is related to the research ideas and analysis methods of the performance limit, which also determines whether the conclusion can direct the design decision of the receiver.Therefore, how to define the narrow-band interference performance limit of spread spectrum ranging becomes the key technical problem in the research of narrowband interference performance limit of inter-satellite link transceiver.The problem of quantitative calculation method for the performance limit of anti-single frequency interference.Single frequency interference is the limit state of narrow band interference, and narrow band signal and single frequency signal have similar characteristics, so their influence on measurement error is similar.The influence mechanism of single frequency interference can be studied first, and the characteristics and rules can be found out from it, which can be regarded as the qualitative recognition of the performance limit of narrowband interference, and the research direction and the way to solve the problem can be found out.Therefore, how to calculate quantitatively the anti-interference performance limit of spread spectrum ranging has become the key technical problem in the research of narrowband interference performance limit of inter-satellite link transceiver.Quantitative determination of narrowband interference performance limits.The influence of narrowband signals is complex and can be understood as the sum of infinite single frequencies.It is obvious that the performance limit against single frequency interference is not directly visible, so it is very difficult to determine the performance limit of narrow band interference.Therefore, how to quantitatively determine the narrowband interference performance limit of spread spectrum ranging has become a key technical problem in the study of narrowband interference performance limit of inter-satellite link transceiver.In order to solve the first key technical problem, this paper defines the performance limit of anti-narrowband interference of spread spectrum ranging, and in order to solve the second key technical problem, the performance limit of anti-single frequency interference of spread spectrum ranging is calculated quantitatively.In order to solve the third key technical problem, the performance limit of narrowband interference in spread spectrum ranging is quantitatively analyzed in this paper.Taking the narrowband interference rejection performance limit of inter-satellite link transceiver based on CSTDD signal system as the research object, the key technical problems mentioned above are quantitatively calculated, analyzed, and the experimental test method and system are designed.Some theoretical research results have been obtained, and the expected purpose has been achieved.
【學位授予單位】：國防科學技術大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN911.4;TN967.1

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