## 二、简介

1 雷达工作原理

2 线性调频（LFM）信号

LFM信号(也称Chirp 信号)的数学表达式为：

3 LFM脉冲的匹配滤波

## 三、部分源代码

%%demo of LFM pulse radar%==================================================================function LFM_radar(T,B,Rmin,Rmax,R,RCS)if nargin==0    T=10e-6;                                          %pulse duration 10us    B=30e6;                                           %chirp frequency modulation bandwidth 30MHz    Rmin=10000;Rmax=15000;              %range bin    R=[10500,11000,12000,12008,13000,13002];  %position of ideal point targets    RCS=[1 1 1 1 1 1];                           %radar cross sectionend%==================================================================%%ParameterC=3e8;                                            %propagation speedK=B/T;                                             %chirp slopeRwid=Rmax-Rmin;                           %receive window in meterTwid=2*Rwid/C;                               %receive window in secondFs=5*B;Ts=1/Fs;                             %sampling frequency and sampling spacingNwid=ceil(Twid/Ts);                         %receive window in number%==================================================================%%Gnerate the echo      t=linspace(2*Rmin/C,2*Rmax/C,Nwid); %receive window                                                            %open window when t=2*Rmin/C                                                            %close window when t=2*Rmax/C                            M=length(R);                                        %number of targets                                        td=ones(M,1)*t-2*R'/C*ones(1,Nwid);Srt=RCS*(exp(j*pi*K*td.^2).*(abs(td)<T/2));%radar echo from point targets  %%demo of chirp signalT=10e-6;                                  %pulse duration10usB=30e6;                                   %chirp frequency modulation bandwidth 30MHzK=B/T;                                      %chirp slopeFs=2*B;Ts=1/Fs;                      %sampling frequency and sampling spacingN=T/Ts;t=linspace(-T/2,T/2,N);St=exp(j*pi*K*t.^2);                    %generate chirp signal

## 五、matlab版本及参考文献

1 matlab版本

2014a

2 参考文献

[1] 沈再阳.精通MATLAB信号处理[M].清华大学出版社，2015.

[2]高宝建,彭进业,王琳,潘建寿.信号与系统——使用MATLAB分析与实现[M].清华大学出版社，2020.

[3]王文光,魏少明,任欣.信号处理与系统分析的MATLAB实现[M].电子工业出版社，2018.

[4]李树锋.基于完全互补序列的MIMO雷达与5G MIMO通信[M].清华大学出版社.2021

[5]何友,关键.雷达目标检测与恒虚警处理（第二版）[M].清华大学出版社.2011