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摘要雷达系统仿真，就是在实际的雷达系统的基础上，建立数学模型并用合适的软件复现雷达系统的工作过程。本文通过MATLAB及其加组件SIMULINK来对雷达系统进行模拟仿真。首先讨论了雷达系统的基本结构和其信号、杂波、噪声、信号处理子库，然后分别研究了各子库的建模，信号子库研究了线性调频信号、巴克码调制的二相编码信号和频率跳变信号；杂波子库研究了概率分布为瑞利分布、对数正态分布、韦布尔分布和指数分布，功率谱为高斯谱、柯西谱和全极谱的杂波，并用无记忆非线性变换（ZMNL）方法模拟杂波环境；噪声子库研究了S S噪声、高斯噪声、高斯混合分布噪声和拉普拉斯分布噪声。随后，信号处理子库研究了高频放大器、混频器、中频放大器、零中频正交解调、匹配滤波、动目标检测和恒虚警处理，并以线性调频信号为例，进行了信号处理模块建模和仿真。仿真结果验证了系统建模的有效性和正确性。24153
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关键词 雷达系统建模与仿真脉冲多普勒雷达脉冲压缩杂波 噪声 恒虚警
毕业设计说明书（毕业论文）外文摘要
Title Modeling and Simulation of Radar System Based on MATLAB
Abstract
The simulation of the radar system is made based on MATLAB and it’s additional components -SIMULINK .Firstly,the basic structure of the radar system is discussed ,along with the signal, clutter and noise, signal processing library.Then the modeling of each library is respectively studied. The library linear frequency modulation signal,barker code modulation of two phase coded signal,and the signal is studied, and the FA signals.The clutter with the probability distribution of Rayleigh , logarithmic normal , exponential and Weibull , and the power spectrum of the gaussian , Cauchy and polarographic , is studied in the Clutter library . All of them is simulated through zero memory nonlinear transform (ZMNL) method. The S S noise, stable - gaussian mixture noise, gaussian mixture distribution and Laplace distribution noise is studied in the Noise library library .Then, the high frequency amplifier, mixer, intermediate frequency amplifier and zero intermediate frequency orthogonal demodulation, matched filtering and moving target detection and constant false alarm rate processing is researched in the signal processing library .And then the modeling and simulation of signal processing is made with the example of linear frequency modulation signal .The validity and the correctness of the system modeling is verified by the simulation results.
Keywords Modeling and Simulation of radar system Pulse-Doppler(PD) Radar pulse-compression Clutter noise constant false alarm rate(CFAR)
目 次
1 绪论 1
1.1 国内外研究现状 1
1.2 课题的目的及意义 1
2 基于SIMULINK的雷达系统简介 3
2.1 SIMULINK简介 3
2.2 雷达系统仿真模型库的建模 5
3 雷达信号库 7
3.1 线性调频信号建模及仿真 8
3.1.1 定义及仿真 8
3.1.2 模糊图分析 8
3.1.3 线性调频信号模糊函数特点 9
3.2 相位编码信号建模及仿真 10
3.2.1 相位编码信号建模 10
3.2.2 模糊图仿真 10
3.2.3 13位巴克码二相编码信号特点 11