Cooperative Relaying Transmission in Correlated MIMO Channels

A half-duplex repetition-coded decode-and-forward cooperative relaying scheme is proposed for correlated MIMO channels. In this scheme, two information messages of the source will be transmitted to the destination simultaneously in each transmit block. One is for direct transmission and the other is for relay transmission. Transmit power allocation and linear preceding at the source and the relay are also involved to approach the capacity of the MIMO single-relay channel with system-wide transmit power constraint. Simulation results show that high capacity gain can be achieved by the proposed scheme compared with direct transmission in most cases.