82雷达信号处理的MATLAB仿真

沈阳理工大学学士学位论文I摘要现代雷达系统日益变的复杂，难以简单直观的进行分析，必须借助计算机来完成对系统的各项功能和性能的仿真。针对现代雷达信号处理的主要方式，运用数字信号处理理论和Matlab软件研究雷达信号处理的仿真问题，提出了一个仿真模型。该模型可以完成雷达信号的仿真、热噪声与杂波的产生和雷达系统中信号的动态处理过程。用Matlab对某脉冲压缩雷达信号处理系统进行了仿真，得到了雷达系统中各个处理点上的具体信号形式，既包含幅度信息，又包含相位信息，该模型能较好地满足对雷达信号处理的仿真要求，显示了用Matlab仿真雷达信号处理系统的方便、快捷的优雷达点。本文讨论的是雷达信号处理部分，并结合雷达处理系统实例来说明MATLAB在雷达信号处理机系统仿真中的应用。关键词：雷达信号处理；正交解调；脉冲压缩；回波积累；恒虚警处理沈阳理工大学学士学位论文IIAbstractModernradarsystemsbecomeincreasinglycomplexanddifficulttosimpleintuitiveanalysis,wemustrelyoncomputersystemstocompletethefunctionalityandperformanceofthesimulationThesimulationofradarsignalprocessingisanimportantpartofthesimulationofradarsystem.ThispaperintroducesamethodofthesimulationofradarsignalprocessingbasedonMatlab,includingthesimulationofradarechoandclutter,andresearchesthesimulationmethodofimportanttechnologiesintheradarsignalprocessing,includingquadraturesampling,pulsecompression,echoaccumulationandCFARdetector.TheworkinthispapercanovercomethedisadvantagessuchasdifficultyandlengthinessandshowtheconvenienceandsimplicityofthesimulationofradarsignalprocessingbasedonMATLAB.Inthispaper,ispartoftheradarsignalprocessingandradarprocessingsystemswithexamplestoillustratetheradarsignalprocessorMATLABsimulationof.Keywords:signalprocessing;quadraturesampling;pulsedcompression;echoaccumulation沈阳理工大学学士学位论文III目录1绪论.........................................................................................................................................11.1雷达信号处理的背景................................................................................................11.1.1信号检测和视频信号积累..............................................................................11.1.2相参信号的杂波抑制技术..............................................................................11.1.3雷达脉冲压缩技术..........................................................................................21.1.4脉冲多普勒（PD）和空时二维信号处理.....................................................21.1.5阵列信号处理技术..........................................................................................31.1.6雷达成像技术..................................................................................................31.1.7雷达目标的识别和分类..................................................................................41.1.8雷达抗电子干扰技术......................................................................................41.1.9雷达信号处理系统技术..................................................................................51.2雷达信号处理的发展趋势........................................................................................51.2.1数字化技术迅速推广......................................................................................51.2.2雷达信号处理技术正向多功能方向发展......................................................51.2.3雷达信号处理的算法迅速发展......................................................................61.2.4多学科领域技术的相互交叉和相互渗透......................................................62雷达技术的分析.....................................................................................................................72.1A/D转换器和采样定理............................................................................................72.2数字滤波器................................................................................................................82.3相参信号处理............................................................................................................82.3.1相参信号处理原理..........................................................................................92.3.2正交相位检波器............................................................................................102.4脉冲压缩处理..........................................................................................................122.4.1脉冲压缩的基本方法....................................................................................132.4.2时域脉冲压缩方法........................................................................................132.4.3频域压缩方法................................................................................................142.5雷达杂波抑制...........................................................................................................152.5.1雷达杂波........................................................................................................16沈阳理工大学学士学位论文IV2.5.2动目标显示（MTI）.....................................................................................162.5.3MTI滤波器....................................................................................................162.5.4动目标检测（MTD）...................................................................................172.6雷达信号检测..........................................................................................................172.6.1雷达信号检测原理........................................................................................172.6.2噪声中的信号检测........................................................................................172.7信号积累................................................................................................................