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[Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resoluti
From: |
Marcus D. Leech |
Subject: |
[Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resolution FFTs |
Date: |
Tue, 06 Jan 2009 18:58:47 -0500 |
User-agent: |
Thunderbird 2.0.0.18 (X11/20081119) |
Let's say, for the sake of interesting discussion, that I have access to
a beastly multi-CPU 'puter, perhaps based on the
latest Xeon 7460 series CPUs, and a quad-socket server, giving me 24
CPUs, and 48 threads.
I'm interested in wideband, high-sensitivity, high-resolution spectroscopy.
I envisage a scheme where one thread gathers an FFT-frame worth of data
(let's say from an USRP2), and doles it out to one
of a number of other threads that are doing FFTs on these frames of
data. All the outputs of the FFT threads are averaged
together to produce a result that is then time averaged.
The existing FFT display schemes in Gnu Radio use a "keep-one-in-n"
scheme for the FFTs, which means that sensitivity
is necessarily lost, due to the spectrum being under-sampled in the
time domain.
Is there existing plumbing to be able to try this sort of thing? [On a
smaller scale--I don't actually have such a monster server
at my disposal at the moment!!].
--
Marcus Leech
Principal Investigator, Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
- [Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resolution FFTs,
Marcus D. Leech <=
- Re: [Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resolution FFTs, Eric Blossom, 2009/01/06
- Re: [Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resolutionFFTs, Marcus D. Leech, 2009/01/06
- Re: [Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resolutionFFTs, Eric Blossom, 2009/01/07
- Re: [Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resolutionFFTs, Marcus D. Leech, 2009/01/07
- RE: [Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resolutionFFTs, Bob McGwier, 2009/01/07
- Re: [Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resolutionFFTs, Marcus D. Leech, 2009/01/07
- RE: [Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resolutionFFTs, Bob McGwier, 2009/01/07
- [Discuss-gnuradio] Object model for stdgui2, Paul Mathews, 2009/01/14
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