Re: Looking for a GOOD explanation of the proof and application of DST, and other DSP techniques.. DSP encyclopedia?

maxplanck wrote:
Time stretching doesn't add new information, it just duplicates
existing information. 50 copies of the first page of a book
is usually far less informative than 50 non-duplicated pages.

What looks cleaner from your FT might just be an artifact of
the assumptions you made in creating 49999 duplicate cycles
from the 1 cycle of actual information.
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IMHO. YMMV.
--
rhn A.T nicholson d.0.t C-o-M
http://www.nicholson.com/rhn/dsp.html


Isn't it a basic property of the FT that for a given periodic signal, with
increased signal length comes increased resolution in the FT's output?

From those 5000 "clean" cycles, you can very accurately determine the frequency. It will turn out to be *exactly* the frequency you assumed when you arbitrarily selected the single segment to duplicate.

The beauty of this method is that it always confirms your initial guess, no matter how far off it is. That is explaining today's clear sky and yesterday's rain as the will of God. Ehat explains everything explains nothing.

Jerry
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Engineering is the art of making what you want from things you can get.
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