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摘要在这个信息爆炸的时代，各领域都发生着日新月异的变化。战争也早已过了单靠长矛短枪这种“冷兵器”就可以取胜的时代。取而代之的则是高速发展的科学感知系统。在当中，雷达是及其关键的一部分。雷达系统不仅能入侵敌方的航空母舰、潜水艇、军用卫星等海陆空三方面军事活动目标进行全方位的监视。而在实际运用中，连续波雷达在接收信号方面的稳定性严重制约了雷达的发展，而中断连续波雷达则在接收信号的保密性上有着不俗的表现，显著地提升了军用雷达的侦察准确性，受到了全球科学研究者的关注。25852
- 上一篇：基于LCD的界面设计和通信控制
- 下一篇：基于信号干扰技术的宽阻带滤波器的设计
本论文旨在建立中断连续波雷达信号回波模型。首先，对常用的13位巴克码以及m序列的自相关特性分别进行了分析，然后根据建立的回波模型，对中断连续波雷达回波信号的模糊函数图进行了仿真和分析。其次，按照雷达回波信号的性能要求以及FPGA的实现的要求，利用Matlab软件设计仿真出信号处理算法。最后，讨论了多普勒频移技术，尝试设计了基于FPGA的多普勒频移方法。本文中此仿真程序包括目标、延时、高斯白噪声、多普勒频移等处理模块，并利用Matlab平台验证了程序的可行性。在此基础上，运用Altera EP3SE110硬件平台的信号处理功能，实现了该信号处理算法，并进行了测试。测试表明，本文设计的仿真程序可以正确地完成中断连续波的雷达回波信号模拟。
关键词 中断连续波 雷达回波信号 高斯白噪声 多普勒频移 FPGA
毕业论文设计说明书外文摘要
Title Interrupt continuous wave radar echo signal simulation Based on FPGA
Abstract
In this era of information explosion, all areas are undergoing rapid changes. In them, the radar is its key part. Radar system can not only invade enemy aircraft carriers, submarines, military satellites, air and sea military activities target three all-round monitoring. In practice, continuous wave radar in the stability of the received signal has been severely hampered the development of radar, interrupted continuous wave radar in the confidentiality of the received signal on a good performance, significantly enhance the military radar reconnaissance accuracy, by the global scientific researchers attention.
This paper aims to establish interrupting the continuous wave radar signal echo model. First, the usual 13 Barker code and autocorrelation properties m sequences were analyzed separately, and then echo the established model, for interrupting the continuous wave radar echo signal ambiguity function diagram simulation and analysis. Secondly, in accordance with the requirements of the performance requirements of the radar echo signal, and FPGA implementation using Matlab software design and simulation of signal processing algorithms. Finally, the Doppler frequency shift technique, try to design a FPGA-based Doppler shift method. This simulation program herein including objectives, delay, Gaussian white noise, Tests show that the design of the simulation program can correctly complete interrupt radar echo signal simulation of a continuous wave.
Keywords quasi-continuous radar pseudorandom code digital signal processing Dopplercompensation FPGA
目 次
1 绪论 1
1.2 国外雷达信号模拟器研究现状 1
1.3 国内研究现状 2
1.4 本文的主要工作和内容安排 2
2 雷达的基本原理及中断连续波雷达回波模型 4
2.1雷达的基本工作原理 4
2.2雷达距离分辨力 6