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Re: [Discuss-gnuradio] Channelizing
From: |
Marcus D. Leech |
Subject: |
Re: [Discuss-gnuradio] Channelizing |
Date: |
Fri, 24 Jun 2011 08:22:02 -0400 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.15) Gecko/20101027 Fedora/3.0.10-1.fc12 Thunderbird/3.0.10 |
On 06/24/2011 01:14 AM, Colby Boyer wrote:
>
>
>
> Hi Marcus,
>
> Check out a pfb channelizer!
>
> gnuradio-core/src/python/gnuradio/blks2impl/pfb_channelizer.py is a
> nice python wrapper for the class and gr_pfb_channelizer_ccf is the
> C++ name.
>
> Also if you need to carve out a a shifted part of the spectrum, use
> the gr_freq_xlating_fir_filter_*** block.
>
> These are polyphase implementations so they should be computationally
> efficient. Lastly, if you need even more efficiency you can see if
> they are doing the fft implementation of filtering (not sure if they
> are vs standard computation). As you know, there is the difference
> between NlogN and N^2
>
> --Colby
Right, so how do I set the filter taps for the PFB channelizer? Is it
just a low-pass filter, or something
else?
--
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org