Re: [Discuss-gnuradio] How to use IQ Bal Optimize/Fix?

[Jeff Long]

If you put 0 in the manual fields and wire

  src->optimize->iqbal

and

  src->iqbal

it seems to work fine. Do you have a GRC file?

"period" is some sort of time constant, in samples. If you set it to 
samp_rate, optimization will happen within a second. Smaller values for 
faster response up to a point.

On 01/31/2018 05:54 AM, kokosz wrote:
> Dear all,
>
> It looks like IQ imbalance is causing problems in my application, as I 
> was able to simulate real-world-like problems after adding "IQ Imbalance 
> Generator" to my GRC flowgraph. So, after simulating this imbalance, I 
> wanted to get rid of it with the help of "IQ Bal Optimize" and "IQ Bal 
> Fix" combo. Unfortunately, I can't get it work.
>
> As far as I understand, "IQ Bal Optimize" is automatically detecting 
> settings (i.e. magnitude and phase correction values) for "IQ Bal Fix" 
> and pass it to the latter block via message connection called 
> "iqbal_corr". Is this is true, I don't understand why I have to manually 
> set "Magnitude" and "Phase" in "IQ Bal Fix" (otherwise I cannot run the 
> flowgraph because of empty fields). I think that these fields were meant 
> for making manual fix possible, but when using "IQ Bal Optimize"/"IQ Bal 
> Fix" combo, message connection should be all what is necessary, right? 
> Also, because of lack of detailed documentation, I am not sure how to 
> interpret "Period" field in IQ Bal Optimize - what units are expected here?
>
> I am using GRC v3.7.11, compiled from source files few days ago.
>
>
>
>
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