I'm asking for your help in understanding if I have a rectangular function, so the autocorrelation for it will be triangular... and I can prove that graphically but this is time-consuming especially if I have another complicated signal...

So is there any way to know how to deduce quickly the graphic shape of the autocorrelation of any signal?

  • $\begingroup$ You could use Matlab or similar languages to get a quick numerical estimate... $\endgroup$ – MBaz Dec 24 '18 at 1:54
  • $\begingroup$ Thanks for your reply, but the problem that I'm afraid that complex function comes at the exam $\endgroup$ – Mamdouh Elsayed Dec 24 '18 at 2:09
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    $\begingroup$ Then your best bet is to practice a lot with the most complex functions you can come up with... there are no shortcuts. As you practice, try to develop your intuition of how a result "should look like"; this will help you catch errors quickly. $\endgroup$ – MBaz Dec 24 '18 at 16:05

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