On 9/9/2010 9:06 PM, Johan H. Bodin wrote:
why not mix the wanted spectrum slice down to DC (I/Q) and then decimate the
signal down to a very low FS and compute a no-so-giant complex-input FFT? Is
there any advantage of making a huge FFT when you don't need more bins than the
number of vertical pixels?
Johan,
yes, that is a sensible way to do it. I could reuse some of
the code of Winrad for this. Maybe, if I feel fit when doing
that,
I could even add a polyphase FFT to increase the frequency
resolution. The only downside to this is that I won't be able
to release
the updated version of Argo in a few days, as I had planned...
73 Alberto I2PHD
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