Jeff, thank you for your tips. Actually I was testing it with another flowgraph and was in a rush to create this simple example, that's why I have fed original signal to these blocks. That's obvious mistake, thank you for pointing it out. I have added sliders in order to change IQ imbalance generator settings in real-time as you suggested, and I can see that "IQ Balance Optimize" block is adjusting its settings. Unfortunately, the output signal is terribly deformed. I guess this is the case mentioned by Sylvain and Marcus, and this block cannot work with such signal. It is a pity. Nevertheless, I appreciate help of all of you. Have a nice day! Dnia 31 stycznia 2018 21:25 Marcus D. Leech <mle...@ripnet.com> napisał(a): On 01/31/2018 03:16 PM, Sylvain Munaut wrote: Hi, * You can just use 0.0 / 0.0 as the default. Those value are only really used if you don't use the message system and just want a fixed / known manually set correction. Once the first message is received, those value are overwritten * As stated the time constant is in samples. * The 'optimize' block only really works when you have some narrow band signals distributed around the spectrums. It will fail _miserably_ if you have a single wideband signal centered around DC ... Cheers, Sylvain Indeed, I find that if I use the osmocom IQ-balance code on radio astronomy "signals" that it produces horrible results in interferometry applications, as it never really "converges", and adds significant long-time-scale phase-noise, so I disable it. ______________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org lists.gnu.org lists.gnu.org
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