Re: [Discuss-gnuradio] sdrsharp auto I/Q balance correction

[Alexandru Csete]

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