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2020-11-12 14:46:51 +00:00
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%% Exercício 2
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2020-11-15 21:51:27 +00:00
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N = (0:15);
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2020-11-12 14:46:51 +00:00
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x1 = ones(1,16);
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2020-11-15 21:51:27 +00:00
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x2 = cos(3*pi.*N./8);
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2020-11-12 14:46:51 +00:00
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2020-11-15 21:51:27 +00:00
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DFT1 = fft(x1, 16);
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2020-11-12 14:46:51 +00:00
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DTFT1 = fft(x1, 1024);
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2020-11-15 21:51:27 +00:00
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DFT2 = fft(x2, 16);
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2020-11-12 14:46:51 +00:00
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DTFT2 = fft(x2, 1024);
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subplot(2,1,1)
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2020-11-15 21:51:27 +00:00
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stem(x2)
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2020-11-17 23:57:44 +00:00
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xlabel('n'), ylabel('Amplitude'), title('Sinal x2')
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2020-11-12 14:46:51 +00:00
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subplot(2,1,2)
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2020-11-15 21:51:27 +00:00
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hold on
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2020-11-17 23:57:44 +00:00
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stem(X(16), abs(DFT2), "LineStyle", "none")
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2020-11-15 21:51:27 +00:00
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plot(X(1024), abs(DTFT2))
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2020-11-17 23:57:44 +00:00
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xlabel('\omega/2\pi'), ylabel('Modulo'), title('DFT / DTFT de x2')
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2020-11-15 21:51:27 +00:00
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hold off
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function f = X(N)
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f = 0:(1/N):(1 - 1/N);
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end
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