exam4_16.m

来自「Real-Time Digital Signal Processing Imp」· M 代码 · 共 9 行

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%  exam4_16.m - M-file for Example 4-16
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n=[0:127]; N=128;
xn=1.5*sin(0.2*pi*n+0.25*pi);  % generate a sinewave
Xk=dft(xn,N);                  % DFT
semilogy(abs(Xk));             % spectrum in dB
axis([0 63 0 120]);