How to i produce a signal which is a combination of three sinusoidal signal oscillate a frequency?

9 次查看（过去 30 天）
NOR AZRIE NORZARI
NOR AZRIE NORZARI 2019-10-14
回答： Fabio Freschi 2019-10-14
sinusoidal signals oscillate at frequency of 10hz, 100hz, and 200hz (random amplitude and phase). Show and explain the generated sinusoidal waveform, its frequency spectrum and its phase by using function subplot.

请先登录，再回答此问题。

回答（1 个）

Fabio Freschi
Fabio Freschi 2019-10-14
% frequencies
f = [10 100 200];
% random amplitudes
V = rand(3,1);
% random phase
phi = 2*pi*rand(3,1);
% time axis
nT = 3; % number of periods
t = linspace(0,nT/min(f),nT*200);
% the signal
v = V(1)*sin(2*pi*f(1)*t+phi(1))+V(2)*sin(2*pi*f(2)*t+phi(2))+V(3)*sin(2*pi*f(3)*t+phi(3));
% plot
figure,
plot(t,v);

类别

在 Help Center 和 File Exchange 中查找有关 Discrete Fourier and Cosine Transforms 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by