MU-MIMO Relaying Scheme for Improvement Reliability in Wireless Communication System

This paper proposes multi user multiple input multiple output (MU-MIMO) relaying scheme for expanding communication coverage and improving reliability in wireless communication system. The performance of the conventional single user multiple input multiple output (SU-MIMO) relaying scheme is reduced due to the error propagation in the relay node. In addition, the signal can be transmitted to only one user. On the other hand, the proposed scheme can improve the performance of the system by combining the signal transmitted through the direct link between the source and destination and signal transmitted from the relay node. Additionally, the proposed scheme can transmit signals to multiple users at the same time by applying the MU-MIMO scheme at the relay node. The simulation results show that the proposed scheme has better bit error rate (BER) performance than the conventional system.