From: Single-user MIMO versus multi-user MIMO in distributed antenna systems with limited feedback
TX precoding | RX combining | RX feedback | |
---|---|---|---|
SU-MIMO | SVD - transceivers | Perfect | |
LTE codebook | ZF | LTE CLSM | |
MU-MIMO | ZF-beamforming | MET | Perfect |
ZF-beamforming | MET, QBC | RCDQ (corr.), APCDQ |