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Beamforming Optimization and Power Allocation for MIMO Asymmetric Multi-Way Relay Channels

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3 Author(s)
Zhendong Zhou ; University of Sydney, NSW, Australia ; Keov Kolyan Teav ; Branka Vucetic

A multiple-input multiple-output (MIMO) multi-way relay channel, where a single base station exchanges independent messages with K users via a relay station, is considered. We propose an iterative beamforming optimization algorithm based on orthogonal projection with signal subspace alignment. Moreover, an optimal power allocation is also designed to maximize the system sum rate. Performance evaluation shows that the proposed scheme produces significant improvement and offers higher sum rate than the existing scheme.

Published in:

IEEE Communications Letters  (Volume:16 ,  Issue: 6 )