Joint transmitter-receiver design for the uplink multi-user-MIMO transmission aided by polarization multiplexing

In this paper, we revisit the performance of a joint transmitter-receiver (Tx-Rx) design for a multi-input multi-output (MIMO) uplink (UL) transmission when aided by polarization multiplexing (PM). At the transmitter, we exploit only the individual user´s channel state information (CSI) to concoct the preprocessing matrix while at the receiver, the CSIs of all the users are invoked to formulate the post-processing matrix. In a multi-user UL transmission, multi-user interference (MUI) can severely degrade the system performance. It is demonstrated through simulation that the joint-Tx-Rx is capable of mitigating the inter-antenna interference (IAI) as well as the MUI.