On 07/30/2014 12:42 PM, Daniele Nicolodi wrote:
Hello,
I was studying the code of the rational resampler block in
gnuradio/gr-filter/pythoin/rational_resampler.py and I have a doubt
about the low pass filter generated by the design_filter() function.
It seems that the generated filter does not take into account the
decimation factor. Is that correct? I don't see how this may result in
the correct anti-aliasing filter when it is applied by
rational_resampler_base_xxx.
Can someone point me to a relevant explanation?
Thanks a lot. Cheers,
Daniele
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The filtering happens *before* resampling. It has to, or you end up
with aliases.
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
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