Transceiver Designs for Multiuser Two-Way Relay Systems

Abstract

Besides the two-user case, the two-way relaying can be extended to the multiuser system to improve the spectrum efficiency. In this study, we aim to design the precoding for the cellular two-way relay system where a based station intends to exchange information with multiple mobile users through a common relay node. Since multiple antennas are equipped at the base station and relay node, carefully designing the percoding at base station, relay or both can improve the system performance. Therefore, three associated precoding design problems are considered and different optimization techniques are applied to deal with these problems. The simulation results verify the efficiency of the proposed designs.