Optimal beamforming for two-way multi-antenna relay channel with analogue network coding

FREE-DOWNLOAD R Zhang, YC Liang, CC Chai… – Selected Areas in …, 2009
Abstract—This paper studies the wireless two-way relay chan- nel (TWRC), where two source
nodes, S1 and S2, exchange information through an assisting relay node, R. It is assumed that
R receives the sum signal from S1 and S2 in one time- slot, and then amplifies and .