Is there an AGC mode that makes both Rx chains to lock at the same gain so that the diversity and SNR difference is preserved. In other words both RX chains use the strong chain's gain.
I checked the register map and there is no feature where one Rx chain gain setting could be slaved off of the other Rx channel.
If timing in your system allows it you could use a combination of AGC and MGC where you would read the gain index from register CTRL_OUT port (see reg 0x035). If Rx1 and Rx2 gain settings are the same you would not adjust the gain and if they are different you would adjust one channel gain index to match the other channel.
Thanks a lot for the answer.
It is a pity that, a "MIMO" RF doesn't implement such an essential operation principle. In theory, a combination of AGC and MGC would work as you mentioned but the timing is a huge constraint which makes this workaround unimplementable for our system.
Retrieving data ...