I have a question related to 5G NR MIMO 4x4 in DL.
I am trying to understand the phrase highlighted in yellow in attached picture from 5G in bullets book.
I can’t understand how gnodeB is able to generate 4 streams, using all antenna elements, using same PRBs, using same time and point them towards 2 different directions.
This would be impossible in my opinion.
It is possible to do 2 streams with half of antenna elements and the other 2streams with the other half of antenna elements.