Thanks for your detailed reply. I asked this earlier and asking it again, In this Massive MIMO Scenario, if we don’t keep the array responses to orthogonal, ZF is performing better as compared to MRT, which is a well known fact and have been reported in literature. if the spatial channels of the users are orthogonal, performance of ZF and MRT/MRC is same, My question here is that what was the motivation behind setting up this scenario or if I say what is the new insight this scenario can provide? Can you suggest any new ideas which can be done using this scenario? I am looking for some novel idea. Thanks!