On Nov 20, 2008, at 11:18 AM, Brian Padalino wrote:
Also is there some way(GNU Radio code that uses PLL and the frequency
offset) to demodulate the signal at this offset frequency back to
baseband?
Use the source. I don't know if there is a block already written that
will do what you want to do - but the fact that you have insight into
all the blocks and the ability to write your own algorithms empowers
you to make GNU Radio do whatever you want it to do.
I've used "gr.freq_xlating_fir_filter_XXX" with success for this
purpose .. admittedly all by hand. AFAIK, there is no automated way
to do it, though IIRC some folks have proposed working on such
algorithms in the past (search the listserv archives). For more
info, look at the source code in gnuradio-core/src/lib/filter . - MLD
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