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[Discuss-gnuradio] sdrsharp auto I/Q balance correction
From: |
Marcus D. Leech |
Subject: |
[Discuss-gnuradio] sdrsharp auto I/Q balance correction |
Date: |
Wed, 04 Apr 2012 23:26:13 -0400 |
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Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.24) Gecko/20111108 Fedora/3.1.16-1.fc14 Thunderbird/3.1.16 |
Has anyone look at the way sdrsharp does automatic I/Q balance correction?
It seems to iterate over an FFT, looking to maximize the difference
between bins and their images. But that badly fails when the *incoming
signal*
has symmetric spectral features--the algorithm could badly screw up
and remove spectral features that are *there in the signal*, rather than
being images present due to poor I/Q balance.
But it's late, and I'm not sure if I'm interpreting this optimization
strategy correctly:
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
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