How to plot the magnitude of the Fourier transform of sampled pulse response?

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Shyngys Serikov
Shyngys Serikov 2022-3-4
评论： Image Analyst 2022-3-4
P(w) = 1 + 0.9e^(-jwT)
with T=1 and sampling theorem satisfaction I got P(e^-jw)= 1 + 0.9e^(-jw)
The pulse response is strictly band-limited in the Nyquist interval -Pi/T < w < Pi/T
What is the code for plotting the magnitude of the Fourier transform of sampled pulse response, i.e., 20log(|P(e^-jwT|)

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回答（1 个）

Image Analyst
Image Analyst 2022-3-4
Did you try plot()? Like
plot(real(P), 'b-', 'LineWidth', 2);
  2 个评论
Image Analyst
Image Analyst 2022-3-4
You asked about plotting: "What is the code for plotting the magnitude of the Fourier transform"
So assuming you have P, here is the full plotting code:
plot(abs(P), 'b-', 'LineWidth', 2);
grid on;
title('P vs. Frequency', 'FontSize', 18);
xlabel('Frequency', 'FontSize', 18);
ylabel('P', 'FontSize', 18);
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