Outage Constrained Robust Hybrid Coordinated Beamforming for Massive MIMO Enabled Heterogeneous Cellular Networks

Guixian Xu, Chia Hsiang Lin, Weiguo Ma, Shanzhi Chen, Chong Yung Chi

研究成果: Article

5 引文 (Scopus)

摘要

Heterogeneous network (HetNet), employing massive multiple-input multiple-output (MIMO), has been recognized as a promising technique to enhance network capacity, and to improve energy efficiency for the fifth generation of wireless communications. However, most existing schemes for coordinated beamforming (CoBF) for a massive MIMO HetNet unrealistically assume the availability of perfect channel state information (CSI) on one hand, and cascade of each antenna with a distinct radio-frequency chain in massive MIMO is neither power nor cost-efficient on the other hand. In this paper, we consider a massive MIMO-enabled HetNet framework, consisting of one macrocell base station (MBS) equipped with an analog beamformer, followed by a digital beamformer, and one femtocell base station (FBS) equipped with a digital beamformer. In the presence of Gaussian CSI errors, we propose a robust hybrid CoBF (HyCoBF) design, including an analog beamforming design for MBS, and a digital CoBF design for both MBS and FBS. To this end, an outage probability-constrained robust HyCoBF problem is formulated by minimizing the total transmit power. The analog beamforming mechanism at MBS is a newly devised low-complexity beam selection scheme by selecting analog beams from a discrete Fourier transform matrix codebook. Then, a conservative approximate CoBF solution is obtained via semidefinite relaxation and an extended Bernstein-type inequality. Furthermore, a distributed implementation for the obtained CoBF solution using alternating direction method of multipliers is proposed. Finally, numerical simulations are provided to demonstrate the efficacy of the proposed robust HyCoBF algorithm.

原文English
文章編號7879806
頁(從 - 到)13601-13616
頁數16
期刊IEEE Access
5
DOIs
出版狀態Published - 2017 一月 1

指紋

Beamforming
Outages
Base stations
Heterogeneous networks
Femtocell
Channel state information
Discrete Fourier transforms
Energy efficiency
Availability
Antennas
Communication
Computer simulation
Costs

All Science Journal Classification (ASJC) codes

  • Computer Science(all)
  • Materials Science(all)
  • Engineering(all)

引用此文

Xu, Guixian ; Lin, Chia Hsiang ; Ma, Weiguo ; Chen, Shanzhi ; Chi, Chong Yung. / Outage Constrained Robust Hybrid Coordinated Beamforming for Massive MIMO Enabled Heterogeneous Cellular Networks. 於: IEEE Access. 2017 ; 卷 5. 頁 13601-13616.
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Outage Constrained Robust Hybrid Coordinated Beamforming for Massive MIMO Enabled Heterogeneous Cellular Networks. / Xu, Guixian; Lin, Chia Hsiang; Ma, Weiguo; Chen, Shanzhi; Chi, Chong Yung.

於: IEEE Access, 卷 5, 7879806, 01.01.2017, p. 13601-13616.

研究成果: Article

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