Secrecy Rate Maximizing Beamforming Schemes for the DF Relay Wiretap Channels
We consider beamforming schemes for the multi-antenna decode-and-forward (DF) relays that maximize the secrecy rate (SR) in the relay wiretap channel.Both full-duplex (FD) and half-duplex (HD) relays are considered, where the FD relay fights the loop-back self-interference while maximizing the SR.The HD relay beamforming is derived from the FD case