Efficient Relay Beamforming Design With SIC Detection for Dual-Hop MIMO Relay Networks

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Executive Summary

In this paper, the authors consider a dual-hop Multiple Input Multiple Output (MIMO) relay wireless network, in which a source-destination pair both equipped with multiple antennas communicates through a large number of half-duplex Amplify-and-Forward (AF) relay terminals. Two novel linear beamforming schemes based on the Matched Filter (MF) and Regularized Zero-Forcing (RZF) precoding techniques are proposed for the MIMO relay system. The focus on the linear process at the relay nodes and design the new relay beamformers by utilizing the Channel State Information (CSI) of both backward channel and forward channel. The proposed beamforming designs are based on the QR Decomposition (QRD) filter at the destination node which performs Successive Interference Cancellation (SIC) to achieve the maximum spatial multiplexing gain.

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