Clear Filters
Clear Filters

How to generate a periodic customized waveform?

1 view (last 30 days)
I want to generate waveforms as shown in the image below and then tweak them to modify the fall time constant of the signal. However, MATLAB doesn't have a customized waveform generator I think. Can I make this waveform in MATLAB? Thanks in advance!

Accepted Answer

Yazan
Yazan on 6 Aug 2021
Edited: Yazan on 7 Aug 2021
This simple function can compute the signal you need. Use lambda to control the decay and see the other parameters.
function x = mySignal(T1, T2, A, lambda, np)
if nargin==0
T1 = 10; T2 = 30; A = 5; lambda = 0.25; np = 5; % np is number of periods
end
t1 = 0:T1-1; t2 = (T1:T2);
x1 = A/(T1-0).*t1;
x2 = A.*exp(-lambda.*(t2-T1));
xx = [x1(:); x2(:)];
x = repmat(xx, [np, 1]);
t = 0:length(x)-1;
figure, plot(t, x), grid minor
ax = gca;
ax.XTick = [0, T1, T2];
ax.XTickLabel = {'0', sprintf('T1=%g', T1), sprintf('T2=%g', T2)};
ax.YTick = [0, A];
ax.YTickLabel = {'0', sprintf('A=%g', A)};
title({'Composite signal', 'Control exponential decay by $\lambda$'}, 'interpreter','latex')
end

More Answers (0)

Categories

Find more on Signal Processing Toolbox in Help Center and File Exchange

Tags

Products


Release

R2021a

Community Treasure Hunt

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

Start Hunting!