AD9361
Recommended for New Designs
The AD9361 is a high performance, highly integrated radio
frequency (RF) Agile Transceiverâ„¢ designed for use in 3G and
4G base station applications....
Datasheet
AD9361 on Analog.com
I made a new firmware for plutosdr and it is act good. In the final step, there is a 4QAM judgement for rx signal, it is clear that the step did a right work form this graph, but I think a DC offset is separating my IQ wave. I am not sure what happen to data correctly and don't know how to deal with it.
by the way, I'm running ad9361-iiostream.c.

Please check running with Rx DC Calibration enabled, see if it improves the performance.
Regards,
SJ
thank you very much SJ!! there are some problems with my description, but it's the same thing. I'll take you method now, thank you again.
thank you very much SJ!! there are some problems with my description, but it's the same thing. I'll take you method now, thank you again.