chirp_ex.m

对雷达系统中的常用LFM线性调频（chirp）信号及其匹配滤波器的设计进行MATLAB仿真

p=20/2;
TW=50;
s=dchirp(TW,p);
figure(1)
T=25e-6;
N=p*TW;
t=[-T/2:T/N:T/2];t(end)=[];
plot(t*1e6,real(s))
xlabel('t (\mus)'),ylabel('The real of s(n)')
title('The Chirp signal')

figure(2)
fs=p*TW/T;
y=fft(s);
y=fftshift(s);
N1=length(y);
f=[-N1/2:N1/2]/N1*fs;f(end)=[];
plot(f/1e6,abs(y)),grid on
title('The frequence of Chirp signal')
xlable('f (MHz)'),ylable('Magnitude')