Hilbert Transforms

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2 total messages Started by Michael Steckner Thu, 27 Sep 1990 23:06

#962

Author: Michael Steckner
Date: Thu, 27 Sep 1990 23:06

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Is there anyone who can help me compute a discrete Hilbert Transform?
I understand that I multiply all positive frequency components by +i
and all negative components by -i, but what about the DC frequency bin?

Also, does the input function need to be in the real domain, or can the
input be a complex function.

Thanks

Re: Hilbert Transforms

#968

Author: Norbert Hanke
Date: Mon, 01 Oct 1990 12:04

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In time domain the Hilbert Transform performs a 90 degree phase shift. Look
at the DC bin as a cosine with zero frequency: phase shifted it will be a
sine with zero frequency, so the DC bin will disapear.
You may use the Hilbert Transform for a complex time function if this
makes sense to you...

Norbert Hanke
ETH Zurich

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