suggestions on generating periodic decaying exponential signal

Question

Neels 2011-7-21

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https://ww2.mathworks.cn/matlabcentral/answers/12167-suggestions-on-generating-periodic-decaying-exponential-signal

Hi, i am trying to generate a periodic decaying exponential signal in the time interval between -5 and 100 . I am trying to visualize it like a sawtooth waveform (but reversed and having gradual decay). can someone help me with this

t=-5:t_step:100;

bt_new=0;

L=0.018;

t_step=0.1221;

N= L/t_step;

for l=0:2.0930e-03:N

    bt = exp(-0.24*((t-(l.*ones(size(t))*t_step))));
    bt_new =bt_new+bt;

end

plot (t,bt_new);

I am trying to generate a periodic decaying exponential, any ideas

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Answer 1

bym 2011-7-22

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https://ww2.mathworks.cn/matlabcentral/answers/12167-suggestions-on-generating-periodic-decaying-exponential-signal#answer_16690

在 MATLAB Online 中打开

is this close to what you want?

clear;clc
t = -5:.1:100;
plot(t,fliplr(sawtooth(t)).*exp(-t./20))

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Neels 2011-7-22

Thanks for the response. the answer is close to what i expected. But basically i want an periodically decaying exponential signal (whose amplitude varies between 1 and 0).

but while using a sawtooth waveform the amplitude extends from -1 to 1. I want to manipulate the amplitude. Do you have any suggestions