I/Q balance calibration

Projects Reference Development Kit
1

Hi
In the development kit manual it says on page 73
“The result of the phase angle calibration can be seen below”
But how it is performed is not said so much about and the same for
the amplitude balance calibration. We have problems when running two boards and
qpsk link. The constellation diagram looks terrible. When running just on one board and loop via two antennas it looks much better.
/lrg

2

Hello Irg,

Th IQ imbalance (Phase and Gain error) reconnection’s has to be done in the baseband. You can find more information in:

  1. Programming and Calibration Guide. . Section 4.8 Correction and Measurement Functions Implemented in BB , page 44.
  2. Improving transceiver performance using digital techniques document.

Regards,
Andrew