University of Oulu

A. Padmanabhan, A. Toelli, M. Juntti and L. N. Tran, "Precoder Design for MU-MISO Transmission with Guaranteed QoS Constraints," European Wireless 2016; 22th European Wireless Conference, Oulu, Finland, 2016, pp. 1-5. URL:

Precoder design for MU-MISO transmission with guaranteed QoS constraints

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Author: Padmanabhan, Ayswarya1; Tölli, Antti1; Juntti, Markku1;
Organizations: 1Centre for Wireless Communications (CWC) - Radio Technologies, University of Oulu, Oulu, Finland - FI-90014
2Department of Electronic Engineering, Maynooth University, Maynooth, Co Kildare, Ireland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.1 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2016
Publish Date: 2018-06-29


We study the problem of designing transmit beamformer for maximizing the weight sum rate of a multi-user (MU)-multiple-input single-output (MISO) interference broadcast channel (IBC) with individual quality-of-service (QoS) constraints. The considered problem is known to be nonconvex and NP-hard indeed, and most of existing high-performance solutions are based on the centralized method. In this paper, we propose a distributed approach for the weighted sum rate maximization (WSRM) problem with QoS constraints by combining successive convex approximation (SCA) framework and the alternating directions method of multipliers (ADMM) technique. More specifically, the proposed algorithm extends a current centralized solution, where the SCA is used to arrive at an approximate convex problem at each step of the iterative procedure. The idea is that we apply the ADMM technique to solve the convex problem of the SCA based subproblem in a distributed manner. We also discuss some heuristic ways to accelerate the convergence rate of the proposed algorithm. Numerical simulations are provided to compare different models for both centralized and distributed algorithms.

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ISBN Print: 978-3-8007-4221-9
Pages: 361 - 365
Host publication: European Wireless 2016 : 22th European Wireless Conference 18-20 May 2016, University of Oulu, Finland
Conference: European Wireless Conference
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work has been co-funded by the Irish Government and the European Union under Irelands EU Structural and Investment Funds Programmes 2014-2020 through the SFI Research Centres Programme under Grant 13/RC/2077.
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