... Beamforming Design for Amplify-and-Forward Multi-Antenna Re-laying Cellular Networks,” under preparation.6. Chengwen Xing, Shaodan Ma and Yik-Chung Wu, “Robust Joint Transceiver Design for ... of cooperative protocols: amplify-and-forward (AF), decode-and-forward (DF) and compress-and-forward (CF). For AFstrategy, the relay only amplifies and forwards the received signal from the sourceto ... precoder design for AF MIMOrelay systems with single user [31].• Furthermore, substituting HRB= ILand Rξ= 0L,Linto (4.42), it becomesthe closed-form solution for LMMSE transceiver design...