I am simulating MIMO-OFDM for 5G NR with MIMO 4x4 and 4 layers, so it is just SU-MIMO (No beamforming and No Massive MIMO).
When I simulate to compute BER and PDSCH Throughput, it gives me a high BER from 0 dB to 25 dB SNR.
When I tried 4x4 and 2 layers, it gives a very good result in BER and Throughput.
So, why the 4x4 with 4 layers gives a very high BER and throughput is not computed?
Any information please?