Sampling of a sinusoidal signal.

Question

Uma sri Vidyadhari 2020-8-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/575317-sampling-of-a-sinusoidal-signal

回答： Image Analyst 2020-8-6

Hi, I want to write undersampling over and perfect samplings to a sinusoidal signal of frequency 200Khz. I tried but couldnt convert continuous to discrete. Can someone help me with the code?

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Answer 1

Image Analyst 2020-8-6

1
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https://ww2.mathworks.cn/matlabcentral/answers/575317-sampling-of-a-sinusoidal-signal#answer_476308

在 MATLAB Online 中打开

Here's a start:

clc;    % Clear the command window.
fprintf('Beginning to run %s.m.\n', mfilename);
close all;  % Close all figures (except those of imtool.)
clear;  % Erase all existing variables. Or clearvars if you want.
workspace;  % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 18;
period = 1/200000;
numSamples = 2000;  % Well oversampled!
t = linspace(0, 5*period, numSamples); % Time covers 5 periods
amplitude = 7;
y = amplitude * sin(2 * pi * t / period);
plot(t, y, 'b-', 'LineWidth', 2);
grid on;
xlabel('t', 'FontSize', fontSize);
ylabel('y', 'FontSize', fontSize);