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Re: [Discuss-gnuradio] sdrsharp auto I/Q balance correction
From: |
Alexandru Csete |
Subject: |
Re: [Discuss-gnuradio] sdrsharp auto I/Q balance correction |
Date: |
Mon, 4 Jun 2012 23:02:37 +0200 |
On Thu, Apr 5, 2012 at 5:26 AM, Marcus D. Leech <address@hidden> wrote:
> 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:
>
Hi Marcus,
I believe this explanation by the author clarifies the issue you raise:
http://www.reddit.com/r/RTLSDR/comments/uje3q/sample_python_code_and_results_for_iq_correction/c4w47bt
Alex
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