exam4_17.m

来自「Real-Time Digital Signal Processing Imp」· M 代码 · 共 11 行

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% exam4_17.m - M-file for Example 4-17
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N=256;
n=[0:N-1];
omega=0.25*pi;
xn=2*sin(omega*n);     % generate a sinewave
Xk=fft(xn,N);          % FFT
absXk=abs(Xk);         % compute magnitude spectrum
plot(absXk(1:(N/2)));