fig7_10.m

基于tms320vc55*系列DSP常用算法

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% Fig7_10.m - M-file for generating Figure 7-10
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n=[0:127];
x1=sin(2*pi*30*n/128);
X1=abs(fft(x1));
x2=sin(2*pi*30.5*n/128);
X2=abs(fft(x2));
subplot(2,1,1),plot(n,X1),axis([0 64 0 70]),
title('(a) Sinewave at 30 Hz'), subplot(2,1,2),
plot(n,X2),axis([0 64 0 70]),title('(b) Sinewave at 30.5 Hz'),
xlabel('Frequency, Hz');