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Particle Swarm Optimization for Weighted Sum Rate Maximization in MIMO Broadcast Channels

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Abstract

In this paper, we investigate the downlink multiple-input-multiple-output (MIMO) broadcast channels in which a base transceiver station (BTS) broadcasts multiple data streams to K MIMO mobile stations (MSs) simultaneously. In order to maximize the weighted sum-rate (WSR) of the system subject to the transmitted power constraint, the design problem is to find the pre-coding matrices at BTS and the decoding matrices at MSs. However, such a design problem is typically a nonlinear and nonconvex optimization and, thus, it is quite hard to obtain the analytical solutions. To tackle with the mathematical difficulties, we propose an efficient stochastic optimization algorithm to optimize the transceiver matrices. Specifically, we utilize the linear minimum mean square error Wiener filters at MSs. Then, we introduce the constrained particle swarm optimization algorithm to jointly optimize the precoding and decoding matrices. Numerical experiments are exhibited to validate the effectiveness of the proposed algorithm in terms of convergence, computational complexity and total WSR.

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Acknowledgements

This research is funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under Grant number 102.04-2013.46.

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Authors and Affiliations

  1. Duy Tan University, Da Nang, Vietnam

    Tung Thanh Vu & Nguyen-Son Vo

  2. Ho Chi Minh City University of Technology, Ho Chi Minh, Vietnam

    Tung Thanh Vu & Ha Hoang Kha

  3. Queen’s University Belfast, Belfast, UK

    Trung Quang Duong

Authors
  1. Tung Thanh Vu
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  2. Ha Hoang Kha
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  3. Trung Quang Duong
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  4. Nguyen-Son Vo
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Correspondence to Ha Hoang Kha.

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Vu, T.T., Kha, H.H., Duong, T.Q. et al. Particle Swarm Optimization for Weighted Sum Rate Maximization in MIMO Broadcast Channels. Wireless Pers Commun 96, 3907–3921 (2017). https://doi.org/10.1007/s11277-017-4357-2

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