MIMO decoding failure under some channel conditions

RAN
1

Hi Experts,
In MIMO, the maximum possible rank of the channel, given by 4, is equal to 4 Layers.
Does this may result in a decoding failure under some channel conditions?

2

Yes, when multipaths are somehow correlated.

3

Is there more information for this please?

4

Check the precoding matrix and do the correlation of beamforming weights.

5

Ok. I know the precoding matrix how to get it, but correlation of weight - how should I know it?