宽带雷达低截获抗干扰性能研究
发布时间：2018-09-10 08:42
【摘要】：宽带雷达因其兼有强抗干扰性和高距离分辨率两种优势,而受到诸多国家的高度重视。本文主要针对宽带雷达的低截获和抗干扰性能进行了研究。 首先分析了宽带雷达目标回波特性和目标回波的距离徙动现象,并讨论了几种不同的宽带信号检测方法,通过仿真验证了宽带雷达目标是多个散射中心的叠加。其次根据雷达低截获因子探讨了雷达获得低截获概率的措施,并对常见的几种低截获率雷达信号形式进行了分析。然后以正交频分复用(OFDM, Orthorgonal Frequency Division Multiplexing)技术为基础,阐述了OFDM雷达信号的基本原理和系统结构、四类干扰类型,根据雷达干扰特点,介绍了几种抗干扰技术。最后使用MATLAB对OFDM信号、截短M序列信号、线性调频信号(LFM, Linear Frequency Modulated)信号的抗干扰性能进行仿真,对其结果进行分析比较,得出截短M序列比OFDM信号和LFM信号的抗干扰性能更优越,同时OFDM信号具有波形复杂多变、设计灵活等优点,所以是低截获抗干扰雷达的常用信号之一。
[Abstract]:Wideband radar has been attached great importance by many countries for its advantages of strong anti-jamming and high range resolution. In this paper, the low-interception and anti-jamming performance of wideband radar is studied. Firstly, the echo characteristics of wideband radar target and the range migration phenomenon of target echo are analyzed, and several different wideband signal detection methods are discussed. The simulation results show that the wideband radar target is a superposition of multiple scattering centers. Secondly, according to the radar low interception factor, the measures to obtain low probability of interception are discussed, and some common low interception rate radar signal forms are analyzed. Then based on orthogonal frequency division multiplexing (OFDM, Orthorgonal Frequency Division Multiplexing) technology, the basic principle and system structure of OFDM radar signal, four kinds of jamming types are described. According to the characteristics of radar jamming, several anti-jamming techniques are introduced. Finally, MATLAB is used to simulate the anti-jamming performance of OFDM signal, truncated M sequence signal and linear frequency modulation signal (LFM, Linear Frequency Modulated) signal. The results are analyzed and compared. It is concluded that truncated M sequence has better anti-jamming performance than OFDM signal and LFM signal. At the same time, OFDM signal has the advantages of complex waveform and flexible design, so it is one of the commonly used signals of LPI radar.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN974
本文编号：2233946
[Abstract]:Wideband radar has been attached great importance by many countries for its advantages of strong anti-jamming and high range resolution. In this paper, the low-interception and anti-jamming performance of wideband radar is studied. Firstly, the echo characteristics of wideband radar target and the range migration phenomenon of target echo are analyzed, and several different wideband signal detection methods are discussed. The simulation results show that the wideband radar target is a superposition of multiple scattering centers. Secondly, according to the radar low interception factor, the measures to obtain low probability of interception are discussed, and some common low interception rate radar signal forms are analyzed. Then based on orthogonal frequency division multiplexing (OFDM, Orthorgonal Frequency Division Multiplexing) technology, the basic principle and system structure of OFDM radar signal, four kinds of jamming types are described. According to the characteristics of radar jamming, several anti-jamming techniques are introduced. Finally, MATLAB is used to simulate the anti-jamming performance of OFDM signal, truncated M sequence signal and linear frequency modulation signal (LFM, Linear Frequency Modulated) signal. The results are analyzed and compared. It is concluded that truncated M sequence has better anti-jamming performance than OFDM signal and LFM signal. At the same time, OFDM signal has the advantages of complex waveform and flexible design, so it is one of the commonly used signals of LPI radar.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN974
【参考文献】
相关期刊论文 前10条
1 张卫;唐希源;顾红;苏卫民;;OFDM雷达信号模糊函数分析[J];南京理工大学学报;2011年04期
2 黄鹏刚;低截获概率雷达技术研究[J];现代电子技术;2003年18期
3 向建军;夏海宝;李新虎;许蕴山;;一种海杂波背景下雷达信号检测方法的研究[J];现代电子技术;2012年07期
4 李晓转;张长革;杨刚;王戈;;一种近场条件下散射成像算法的研究[J];现代电子技术;2012年07期
5 黄美秀;陈祝明;段锐;江朝抒;;编码跳频信号的低截获性能分析[J];现代雷达;2011年10期
6 黎海涛,徐继麟;超宽带雷达目标回波建模[J];系统工程与电子技术;2000年10期
7 贺知明,黄巍,张一冰,向敬成;适用于宽带雷达的非相干杂波抑制方法[J];系统工程与电子技术;2004年05期
8 黄巍,贺知明,向敬成;宽带雷达能量积累与信号检测方法研究[J];系统工程与电子技术;2004年07期
9 肖建峰;黄培康;文树梁;;一种宽带雷达相干检测的新方法[J];系统工程与电子技术;2008年10期
10 李海英,杨汝良;超宽带雷达的发展、现状及应用[J];遥感技术与应用;2001年03期
相关博士学位论文 前3条
1 赵建宏;低空目标探测及宽带雷达信号检测研究[D];电子科技大学;2008年
2 李明;机载宽带雷达信号处理若干问题研究[D];西安电子科技大学;2007年
3 戴奉周;宽带雷达信号处理[D];西安电子科技大学;2010年
，本文编号：2233946
本文链接：https://www.wllwen.com/kejilunwen/wltx/2233946.html
