In order to clean antenna coupling, we issue a CLI command called “calibDcRangeSig”.
After DC range calibration, it was subtracted from the received samples for subsequent.
We found it works well at the beginning, but DC term will increase after a while.
We have no idea what’s the root cause, would you help us to confirm?
Test command:
calibDcRangeSig -1 1 -5 10 128
Test result: (Range FFT for RX3 & RX4, range index 1 = 5 cm)
Before DC term calibration.
After calibration
After calibration around 30 min
Summary:
It was found the DC term will increase to almost the gain value before doing DC term calibration,
