how to Create random signal

random signal how to

[the cyclist]

There are many types of random signals. You need to be more specific. For example, I assume that the wind (red points) is autocorrelated in some way, and that the load (blue points) is correlated with the wind. Can you provide some details about that?

Answer 1

[Star Strider]

With the information from your latest Comment, one possibility is:

t = 0:200;
smax =  1.5;
smin = -0.8;
s = smin + (smax-smin)*rand(1,length(t));

figure(1)
plot(t, s)
grid

[Na Ka]

Thanks alot, I got it, once more thanks

[Star Strider]

My pleasure.

[Na Ka]

excuse me dear Star Strider, If i want to put this data in a matrice What should I do? for example I want to solve this equation on the random figure, F(x)=2S(t)+2 for t=2 if i have the random data in a matrics, the f(x) looks for t=2 and put S(2) in the function.

[Star Strider]

It is a vector, not a matrix, but it could be considered an array as well, depending on your definition.

There are several ways to evaluate your ‘F’ function, this is one:

t = 0:200;
smax =  1.5;
smin = -0.8;
s = smin + (smax-smin)*rand(1,length(t));

F = 2*s + 2;                                % Define: ‘F(t)’

figure(1)
plot(t, s,   t, F)
grid

t2 = find(t == 2);                          % Find index for ‘t=2’
Ft2 = F(t2)                                 % F(t=2)

Since this is random, ‘Ft2’ will change each time you run the code (unless you use the rng function to define the random-number generator seed to be the same for each run of your code).

[Star Strider]

My pleasure.

[Star Strider]

Apologise for the delay — life intrudes.

I believe you intend ‘transfer function’.

To use it with the signal I programmed, you will have to create a discrete expression of your transfer function, from ‘s’ to ‘z’. I would use the bilinear transform. Then use the filtfilt function for the actual filtering. (Your transfer function would actually be a filter in this instance.) If you have the Signal Processing Toolbox, all this is relatively straightforward but will take some time to learn if you are not familiar with it.

The MATLAB documentation, along with most signal processing textbooks, go into sufficient detail to allow you to do the conversion to the discrete form of your filter and the subsequent filtering relatively easily. It is much too involved for me to go into here, so I will refer you to the documentation and your textbooks.

[Ionut Miller]

ty man you are a beast

Answer 2

[Azzi Abdelmalek]

Create a mat file like this one

t=0:0.1:10
y=rand(1,numel(t))
ty=[t;y]
save filename ty

In your simulink model add the from file block and set the file name to your mat-file name

[ali al-khayyat]

Can you please generate triangle or carrier signal starts from 0 to 60 degree and stops and then starts from 120 to 180 and then repeat itself, either by coding or simulink, please?

[the cyclist]

This question and answer are over 4 years old. I suggest you open a new question.

Answer 3

[Muhammad Tayyab]

𝑋(𝑡)=𝐴𝑐𝑜𝑠(2𝜋𝑓𝑐𝑡+Θ)+𝑊(𝑡)

i want to generate this signal. kind help required

[Muhammad Tayyab]

𝑋(𝑡)=𝐴𝑐𝑜𝑠(2𝜋𝑓𝑐𝑡+Θ)+𝑊(𝑡)

Θ uniformly random [-pi, pi]

W(𝑡) is Guassian with mu=0 & sigma=No/2

[Les Beckham]

You should really open a new question instead of inserting your question as an answer to a 6 year old question.

Also, read this:https:https://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

If you provide the code that you have written to try to solve your problem and show us what errors you get when your run it, you are likely to get someone to help you fix it. If you appear to be asking us to do all of the work for you, you will be less likely to get help.