haode.m

对ASK调制解调进行了仿真,包括程序仿真和模型仿真

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(y);
N1=length(y);
f=[-N1/2:N1/2]/N1*fs; f(end)=[];
plot(f/1e6,abs(y)),grid on
title('The frquence of Chirp signal')
xlabel('f (MHz)'),ylabel('Magnitude');