卫星通信抗干扰及其性能评估指标体系研究

发布时间：2018-09-08 21:48

【摘要】：卫星通信的广播传播方式和位置的暴露性,使其容易成为干扰的目标。因此对其抗干扰技术的研究和抗干扰性能的评估具有重要意义。本文从卫星通信将会面临的各类干扰出发,研究了常用的抗干扰技术和新型抗干扰技术,并建立了评估卫星通信抗干扰性能的指标体系。首先,在分析卫星通信面临的各种干扰类型及其特点的基础上,重点研究了卫星通信常用的多波束天线和跳频两种抗干扰技术。分析了多波束天线的抗干扰原理,通过仿真验证了在不切换波束和切换波束两种情况下,多波束天线的抗干扰性能均优于普通天线。随后深入研究了跳频抗干扰的基本原理,通过仿真比较了跳频系统抵抗单音、多音、宽带噪声等不同干扰的性能,并在此基础上建立了Ka波段卫星通信跳频抗干扰性能仿真平台,该平台能够仿真分析Ka波段卫星通信系统利用跳频抵抗不同干扰的性能。其次,论文研究了基于卫星通信的灵巧干扰的特点、类型和产生流程。在对卫星通信实施灵巧干扰时,前期侦察是保证干扰有效进行的重要阶段。基于这一特点,提出了将物理层安全传输技术应用到抵抗前期侦察中,进而从整体上有效抵抗基于卫星通信的灵巧干扰。具体研究了物理层安全传输技术中多天线波束成形和人工噪声干扰辅助两种安全传输策略,仿真结果表明这两种策略均能有效抵抗灵巧干扰。最后,论文分析了建立卫星通信抗干扰性能评估指标体系的过程,研究了该指标体系的框架结构,从基础性抗干扰技术和拓展性抗干扰技术出发,选取了能够直接反映各种抗干扰技术的性能指标,建立了一套卫星通信抗干扰性能评估指标体系。该指标体系具有指标全面、量化程度高、可拓展等优点。
[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.
【学位授予单位】：国防科学技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN927.2

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