See http://gnuradio.org/trac/wiki/GNURadioCompanion#FilterDesign
you have access to all the firdes function from inside grc. Just pick
out an FIR filter block, and enter firdes.root_raised_cosine(...) for
the taps parameter.
I made a few wrappers around the FIR filters for the pass band taps: low
pass, high pass... are all in grc. I could easily make another for the
root raised cosine FIR filter, so you dont have to type this firdes....
nonsense.
The issue is that there are a N blocks that take taps as a parameter,
and there are M taps generators, and it would be hell to make MxN
convenience wrappers for all of them.
However, I would like to make these convenience blocks for some of the
combinations. Would RRC FIR be useful? Any other suggestions for some
practical combinations?
-Josh
Glenn Richardson wrote:
Where did the root_raised_cosine filter go?
I recently began exploring GRC in the svn trunk, and quickly realized
that the root_raised_cosine filter has gone missing.
Missing is perhaps too strong of word... the filter exists in the
gr_firdes general library, but isn't brought out to a GRC block of that
name that I can find. Do I simply need to create a custom XML wrapper
for it, or is it hidden in another filter as an option? I've begun to
edit my "custom" XML filter, but am second guessing myself now. Is
there some other SDR black magic (math) that I don't know? I'm new to
fairly gnuradio and still getting oriented to the source code.
Thanks in advance,
Glenn
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