用matlab对不同信号的雷达信号进行仿真，例如线性调频信号，频率捷变信号等

clear all; close all; RF1=2.3*1e7;%230MHz RF2=3.3*1e7;%330MHz RF3=2.5*1e7;%250MHz PW=8*1e-5;%80us PRI=4*1e-4;%400us PA=1; per=PW/PRI; N=PRI*RF2; t=linspace(0,5*PRI,20*N); y1=(1+square(2*pi*t/PRI,100*per))/2; y2=(1+square(2*pi*(t-1e-5)/PRI,100*per))/2; y3=(1+square(2*pi*(t-2*1e-5)/PRI,100*per))/2; x1=(1+sin(1000*pi*RF1*t))/2; x2=(1+sin(1000*pi*RF2*t))/2; x3=(1+sin(1000*pi*RF3*t))/2; z1=y1.*x1; z2=y1.*x2; z3=y1.*x3; z4=y2.*x1; z5=y2.*x2; z6=y2.*x3; z7=y3.*x1; z8=y3.*x2; z9=y3.*x3; y=(z1+z2+z3)/3; yd=(z4+z5+z6)/3; yd2=(z7+z8+z9)/3; subplot(311); plot(t,y); title('频率分集同时发射'); subplot(312); plot(t,yd); title('频率分集延时10us发射'); subplot(313); plot(t,yd2); title('频率分集延时20us发射');