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MMSE-based beamforming techniques for relay broadcast channels

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journal contribution
posted on 02.02.2017 by Kanapathippillai Cumanan, Yogachandran Rahulamathavan, Sangarapillai Lambotharan, Zhiguo D. Ding
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.

Funding

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.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

IEEE Transactions on Vehicular Technology

Volume

62

Issue

8

Pages

4045 - 4051

Citation

CUMANAN, K. ... et al, 2013. MMSE-based beamforming techniques for relay broadcast channels. IEEE Transactions on Vehicular Technology, 62 (8), pp. 4045-4051.

Publisher

© IEEE

Version

AM (Accepted Manuscript)

Publication date

2013

Notes

© 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.

ISSN

0018-9545

Language

en

Exports