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[Discuss-gnuradio] Performance at 25Msps

From: Marcus D. Leech
Subject: [Discuss-gnuradio] Performance at 25Msps
Date: Mon, 06 Dec 2010 16:06:18 -0500
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20101027 Fedora/3.0.10-1.fc12 Thunderbird/3.0.10

I have succeeded in making my IRA application run at 25Msps, on my "poor mans server", which is an AMD Phenom II X6 1090T running at 3.2GHz, with 8GB of 1333MHz memory, and running Fedora 14. When running at 25Msps bandwidth, the application consumes about 4.5CPUs, which leaves enough headroom to do "other stuff" as and when I need to. Coolness.

This application performs total-power radiometry, simple spectrometry, SETI spectrometry, and Pulsar and cosmic-transient
  analysis of the incoming bandwidth.

In radiometry, sensitivity is proportional to sqrt(Bandwidth * IntegrationTime), so being able to process the maximum amount of
  bandwidth really helps.

I'm currently using a WBX card, but I've also used it with a DBS_RX.

I'm running the USRP2+WBX *in skin* inside my 4U server enclosure, and the noise levels appear (at least at 1.4GHz) to be
  very modest, which is a relief!

Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

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