【摘要】：衛(wèi)星通信的廣播傳播方式和位置的暴露性,使其容易成為干擾的目標(biāo)。因此對(duì)其抗干擾技術(shù)的研究和抗干擾性能的評(píng)估具有重要意義。本文從衛(wèi)星通信將會(huì)面臨的各類干擾出發(fā),研究了常用的抗干擾技術(shù)和新型抗干擾技術(shù),并建立了評(píng)估衛(wèi)星通信抗干擾性能的指標(biāo)體系。首先,在分析衛(wèi)星通信面臨的各種干擾類型及其特點(diǎn)的基礎(chǔ)上,重點(diǎn)研究了衛(wèi)星通信常用的多波束天線和跳頻兩種抗干擾技術(shù)。分析了多波束天線的抗干擾原理,通過(guò)仿真驗(yàn)證了在不切換波束和切換波束兩種情況下,多波束天線的抗干擾性能均優(yōu)于普通天線。隨后深入研究了跳頻抗干擾的基本原理,通過(guò)仿真比較了跳頻系統(tǒng)抵抗單音、多音、寬帶噪聲等不同干擾的性能,并在此基礎(chǔ)上建立了Ka波段衛(wèi)星通信跳頻抗干擾性能仿真平臺(tái),該平臺(tái)能夠仿真分析Ka波段衛(wèi)星通信系統(tǒng)利用跳頻抵抗不同干擾的性能。其次,論文研究了基于衛(wèi)星通信的靈巧干擾的特點(diǎn)、類型和產(chǎn)生流程。在對(duì)衛(wèi)星通信實(shí)施靈巧干擾時(shí),前期偵察是保證干擾有效進(jìn)行的重要階段�；谶@一特點(diǎn),提出了將物理層安全傳輸技術(shù)應(yīng)用到抵抗前期偵察中,進(jìn)而從整體上有效抵抗基于衛(wèi)星通信的靈巧干擾。具體研究了物理層安全傳輸技術(shù)中多天線波束成形和人工噪聲干擾輔助兩種安全傳輸策略,仿真結(jié)果表明這兩種策略均能有效抵抗靈巧干擾。最后,論文分析了建立衛(wèi)星通信抗干擾性能評(píng)估指標(biāo)體系的過(guò)程,研究了該指標(biāo)體系的框架結(jié)構(gòu),從基礎(chǔ)性抗干擾技術(shù)和拓展性抗干擾技術(shù)出發(fā),選取了能夠直接反映各種抗干擾技術(shù)的性能指標(biāo),建立了一套衛(wèi)星通信抗干擾性能評(píng)估指標(biāo)體系。該指標(biāo)體系具有指標(biāo)全面、量化程度高、可拓展等優(yōu)點(diǎn)。
[Abstract]:The exposure of broadcast mode and location of satellite communication makes it easy to be the target of interference. Therefore, it is of great significance to study the anti-jamming technology and evaluate its anti-jamming performance. In this paper, the common anti-jamming technology and the new anti-jamming technology are studied, and the index system for evaluating the anti-jamming performance of satellite communication is established. Firstly, on the basis of analyzing the types and characteristics of various kinds of interference in satellite communication, two kinds of anti-jamming techniques such as multi-beam antenna and frequency-hopping (FH) which are commonly used in satellite communication are studied. The anti-jamming principle of multi-beam antenna is analyzed. The simulation results show that the anti-jamming performance of multi-beam antenna is better than that of common antenna without switching beam and switching beam. Then, the basic principle of frequency hopping anti-jamming is deeply studied, and the performance of frequency hopping system against different interference such as single tone, multi-tone, broadband noise and so on is compared by simulation. On this basis, the simulation platform of frequency hopping and anti-jamming performance of Ka band satellite communication is established. The platform can simulate and analyze the performance of Ka band satellite communication system to resist different interference by frequency hopping. Secondly, the characteristics, types and process of smart interference based on satellite communication are studied. Early reconnaissance is an important stage to ensure the jamming of satellite communication. Based on this characteristic, the physical layer secure transmission technology is applied to resist the early reconnaissance, and then the smart interference based on satellite communication is effectively resisted as a whole. In this paper, two kinds of secure transmission strategies, multi-antenna beamforming and artificial noise interference, in the physical layer secure transmission technology are studied. The simulation results show that the two strategies can resist dexterous interference effectively. Finally, the paper analyzes the process of establishing the evaluation index system of satellite communication anti-jamming performance, and studies the frame structure of the index system, starting from the basic anti-jamming technology and the extended anti-jamming technology. The performance indexes which can directly reflect various anti-jamming techniques are selected and a set of anti-jamming performance evaluation index system for satellite communication is established. The index system has the advantages of comprehensive index, high quantification degree and expansibility.
【學(xué)位授予單位】：國(guó)防科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN927.2

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本文編號(hào)：2231791