How to generate a real time signal?

I couldn't able to find any information about it. What I meant is that creates a signal that behaves like it comes from air. So its amplitude always changing.At least time defined for the changing. How to achieve this? Is it possible??

Answer 1

[Sulaymon Eshkabilov]

If what you need is a sort of white noise, then you can use random number generators, e.g.:

rand() - uniform distributed,

randn() - normally distributed random numbers, or

randi() - uniform distributed integer numbers.

[Murat Sari]

Actually what I tryna get is like in https://www.mathworks.com/videos/waveform-generation-using-mathworks-sdr-1554978351616.html In the video, where spectrum analyzer shows the real time signal with the help of SDR, I wanna get a signal like that without SDR and I wonder is it possible or not.

[Murat Sari]

It's okay to use those commands to generate a random signal. But it won't give me a chance of modelling a real time signal. What I mean with 'real time signal' is that I expect it changes all the time (at least during the time I'll define)