Title :
Beamforming Optimization and Power Allocation for MIMO Asymmetric Multi-Way Relay Channels
Author :
Zhou, Zhendong ; Teav, Keov Kolyan ; Vucetic, Branka
Author_Institution :
Univ. of Sydney, Sydney, NSW, Australia
fDate :
6/1/2012 12:00:00 AM
Abstract :
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.
Keywords :
MIMO communication; array signal processing; iterative methods; optimisation; MIMO asymmetric multiway relay channels; iterative beamforming optimization algorithm; multiple-input multiple-output channel; optimal power allocation; orthogonal projection; performance evaluation; relay station; signal subspace alignment; single base station; system sum rate maximization; Array signal processing; Bismuth; MIMO; Optimization; Relays; Resource management; Vectors; Beamforming; MIMO; multi-way relay;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2012.042512.112457
