【作者】 刘晓丰；

【导师】 田斌；

【作者基本信息】 西安电子科技大学 ， 通信与信息系统， 2007， 硕士

【摘要】 星上处理是卫星通信的重要发展方向,如何有效地干扰具备星上抗干扰处理的通信卫星系统是一个富有挑战性的重要研究课题。另一方面,时频分布与小波理论的不断发展,使得信号的非平稳特性成了通信对抗研究的重点。本文就是在此背景下探索针对卫星星上处理通信链路的高效能干扰模式。本文在对跳频卫星通信系统、具有星上抗干扰措施的卫星通信实验系统组成及各种抗干扰措施进行深入分析研究的基础上,主要对各种干扰对跳频卫星通信系统的干扰效果和基于时频分布的新干扰样式对卫星通信实验系统的干扰性能进行了实验仿真。主要研究工作和成果有：1.深入研究了跳频卫星通信链路系统的结构组成、工作原理,详细分析了其信号格式和各种干扰对其的影响。在此基础上,以MATLAB为平台,建立跳频卫星通信链路系统及干扰的仿真模型,并进行了干扰的性能分析。2.介绍一种基于FDMA-CWTDM转换的卫星抗干扰通信实验系统,对其基本原理和抗干扰措施进行分析,以此为基础,构成干扰实验分析平台。3.介绍基于时频分布的新干扰样式并进行了针对卫星通信实验系统的仿真实验,根据仿真结果,给出了其对该实验系统卫星通信链路干扰的性能分析。4.和他人合作,完成硬件的中频、射频测试来验证新干扰样式和其他干扰样式的性能对比。更多还原

【Abstract】 On board anti-jamming processing is an important research direction, and it is a challenging problem to jam the data links of communication satellites with on board processing. On the other hand, with the rapid development of time-frequency distribution and wavelet theory, the non-stationary characteristics of signals is believed to play an important role in communication counterwork. This thesis aims to explore the most efficient jamming patterns to communication data links of on board processing satellites.After analysis of FH satellite communication, an on board anti-jamming experimental communication satellite system and its anti-jam measures, this thesis mainly analyzes and simulates the anti-jamming ability to FH satellite communication and the jamming ability of time-frequency distribution based interference mode to the experimental communication satellite system. The author’s main work and contributions are as follows:1. A thorough theoretical analysis of the structure and principle of FH satellite communication links was made. The signal form and the impact of various jam interferences is analyzed in detail. By taking MATLAB as the platform, an FH satellite communication was built and simulations of jamming this system with various interference as well as the analysis were undertaken.2. An anti-jamming experimental satellite communication system based FDMA-CWTDM was introduced. The fundamental and its anti-jamming measures of this system were analyzed, and thereby the jamming experiment platform was setup.3. A high efficient Time-frequency distribution based jamming pattern was introduced. Performance comparisons between the new jamming pattern and other patterns to the experimental satellite system were made by simulations, and performance analysis was given.4. Cooperating with others, the experimentation based on system hardware was fulfilled to verify the performance of jamming patterns.更多还原