Maximizing Spectral efficiency instead of maximizing SINR in RI selection in 5G NR toolbox

Hi all,

I've noticed that the new version of the 5G Toolbox includes two different algorithms for calculating Rank Indication (RI): 'MaxSINR' and 'MaxSE'. The 'MaxSINR' algorithm selects the RI based on maximizing the SINR, while 'MaxSE' selects it based on maximizing spectral efficiency.

I was under the impression that the standard approach was to select the rank that maximizes SINR. Could anyone clarify the rationale behind including both algorithms and when one might be preferred over the other?

Thanks a lot