International Conference on Computer and Automation Engineering, 4th (ICCAE 2012)
51 Beamforming for Mimo Relaying Systems Based on Channel Mean Feedback
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This paper investigates transmit beamforming for MIMO relaying systems. Assuming perfect channel state information (CSI) at the destination, we consider the delay on the feedback channel. By channel mean feedback, the transmitters obtain a prediction about CSI. Then beamforming is carried out by mapping the signals to the dominant right singular vectors of the source-relay and relaydestination channels. Simulation results show that the proposed scheme achieves a good performance with delayed CSI.