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jeff millar wrote:
<blockquote cite="mid:4A6CA073.6090304@wa1hco.net" type="cite">
<pre wrap="">If we design an SDR with high bandwidth between the SDR and the PC, then
it more likely that an FFT based filtering scheme will have better
performance than an FIR based approach.</pre>
</blockquote>
I am not disputing this. Of course filtering done with FFT techniques
have an advantage over<br>
FIR filtering when the number of taps of the FIR goes over 20 or 30.<br>
<br>
I was saying that I don't think that doing a downsampling with a series
of cascaded FFT/IFFT<br>
can have a computational cost inferior to that of a downsampling in the
time domain.<br>
But of course, I have never tried the FFT/IFFT technique, so cannot
speak from direct experience...<br>
<br>
73 Alberto I2PHD<br>
<br>
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