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Title: MMSE-based beamforming techniques for relay broadcast channels
Authors: Cumanan, Kanapathippillai
Rahulamathavan, Yogachandran
Lambotharan, Sangarapillai
Ding, Zhiguo D.
Keywords: Relays
Quality of service
Uplink
Resource management
Minimization
Array signal processing
Optimization
Issue Date: 2013
Publisher: © IEEE
Citation: CUMANAN, K. ... et al, 2013. MMSE-based beamforming techniques for relay broadcast channels. IEEE Transactions on Vehicular Technology, 62 (8), pp. 4045-4051.
Abstract: We propose minimum mean square error (MMSE)-based beamforming techniques for a multiantenna relay network, where a base station (BS) equipped with multiple antennas communicates with a number of single-antenna users through a multiantenna relay. We specifically solve three optimization problems, namely, 1) the sum-power minimization problem, 2) the mean-square-error (MSE) balancing problem, and 3) the mixed quality-of-service (QoS) problem. Unfortunately, these problems are not jointly convex in terms of beamforming vectors at the BS and the relay amplification matrix. To circumvent this nonconvexity issue, the original problems are divided into two subproblems, where the beamforming vectors and the relay amplification matrix are alternately optimized, whereas the other is fixed. Three iterative algorithms are developed based on convex optimization techniques and general MSE duality. Simulation results are provided to validate the convergence of the proposed algorithms.
Description: © 2013 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Sponsor: This work was supported by the Engineering and Physical Sciences Research Council (EPSRC) of the U.K. under Grant EPSRC G020442 and Grant EP/I037423/1.
Version: Accepted for publication
DOI: 10.1109/TVT.2013.2257906
URI: https://dspace.lboro.ac.uk/2134/23968
Publisher Link: http://dx.doi.org/10.1109/TVT.2013.2257906
ISSN: 0018-9545
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)
Published Articles (Loughborough University London)

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