Is Hilbert transform not defined for complex signals? In MATLAB, the function hilbert ignores if you give a complex sequence as input. Why?

Is Hilbert transform not defined for complex signals? In MATLAB, the function hilbert ignores imaginary part if you give a complex sequence as input. Why?

Answer 1

[John D'Errico]

There is no function that I can find called hilbert.m, as provided with MATLAB, written by by The MathWorks.

I assume that you found some piece of code written and placed on the file exchange. Perhaps this submission . If so, then you can ask the author. Of course, I would point out that that code was placed there in 1998, and has not been touched since. The author may well have moved on. His latest submission to the FEX was in 2009. So do not be surprised if you get no response to a question asked in the comments, or even direct e-mail to him. E-mail addresses do change over time.

Or you may have found some other code named hilbert.m.