Distributed Alamouti Protocol for Full-Duplex Decode-and-Forward Relaying Networks

In this letter, a novel distributed Alamouti based full-duplex relaying (FDR) scheme called DA-FDR is proposed for three-node cooperative network with the existing of residual self-interference (RSI). With a well-designed FD transmission protocol, the second order transmit diversity can be obtained with only one antenna equipped in each of the source and the destination nodes. Moreover, the DA-FDR system can approach full transmit rate in spite of the delay caused by the decoding at relay node. Finally, a fast demodulator is designed which reduces the decoding complexity from
$M^{3}$
to
$M^{2}+M$
. Simulation results demonstrate that the proposed DA-FDR scheme significantly outperforms the existing Alamouti-based DSTC and conventional half-duplex schemes.