Journal of Communications and Networks

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Robust Transceiver Designs in Multiuser MISO Broadcasting with Simultaneous Wireless Information and Power Transmission

  • Zhu, Zhengyu (School of Information Engineering, Zhengzhou University, School of Electrical Engineering, Korea University) ;
  • Wang, Zhongyong (School of Information Engineering, Zhengzhou University) ;
  • Lee, Kyoung-Jae (Dept. of Electronics and Control Engineering, Hanbat National University) ;
  • Chu, Zheng (School of Electrical and Electronic Engineering, Newcastle University) ;
  • Lee, Inkyu (School of Electrical Engineering, Korea University)
  • Received : 2014.12.19
  • Accepted : 2015.08.21
  • Published : 2016.04.30
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Abstract

In this paper, we address a new robust optimization problem in a multiuser multiple-input single-output broadcasting system with simultaneous wireless information and power transmission, where a multi-antenna base station (BS) sends energy and information simultaneously to multiple users equipped with a single antenna. Assuming that perfect channel-state information (CSI) for all channels is not available at the BS, the uncertainty of the CSI is modeled by an Euclidean ball-shaped uncertainty set. To optimally design transmit beamforming weights and receive power splitting, an average total transmit power minimization problem is investigated subject to the individual harvested power constraint and the received signal-to-interference-plus-noise ratio constraint at each user. Due to the channel uncertainty, the original problem becomes a homogeneous quadratically constrained quadratic problem, which is NP-hard. The original design problem is reformulated to a relaxed semidefinite program, and then two different approaches based on convex programming are proposed, which can be solved efficiently by the interior point algorithm. Numerical results are provided to validate the robustness of the proposed algorithms.

Keywords

Acknowledgement

Supported by : National Nature Science Foundation of China

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