I was totally unaware of SIMD before you mentioned it. That's an
interesting subject. It is my understand that SIMD is integrated into
gnuradio through VOLK as of Dec. 2010. Doesn't look like I can use VOLK
directely from grc, or even from Python. Looks like it needs to be
implemented at the block level in C++. Is this the case?
The latest master GIT repo for Gnu Radio has integrated work to make
many of the core
functions SIMD-aware using Volk-based processing "kernels". If you
run the latest, you
should already be benefitting from SIMD implementations of many core
functions, including
filtering, and basic math like complex add, multiply, etc.
But I wonder, given the apparent confusion about decimation whether you
actually need very-high sample rates, or
perhaps you have a misconception about what you really need out of a
flow-graph. For example, the sample-rate has
very little to do with the final RF frequency you're "looking at" or
generating. Unless you're doing very-wideband
spectral analysis, or have very-wideband signals to deal with (or any
of a number of other interesting wideband applications
like Radio Astronomy), you don't need any more bandwidth that will
comfortably "fit" your signal(s) of interest.
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
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