Energy-efficient Based Hybrid Precoding for Beamspace MIMO Systems with Lens Array

Ding, T., Zhao, Y., Lixin, L., Zhang, L. and Hu, D. (2020) Energy-efficient Based Hybrid Precoding for Beamspace MIMO Systems with Lens Array. In: 19th IEEE International Conference on Communication Technology (ICCT 2019), Xi'an, China, 16-19 Oct 2019, pp. 628-632. ISBN 9781728105352 (doi: 10.1109/ICCT46805.2019.8947212)

Abstract

The beamspace MIMO can significantly reduce the number of power radio frequency (RF) chains in millimetre-wave (mmWave) communications by utilizing lens antenna array. However, most existing studies consider the phase shifters (PSs) as the main components of the analog beamformer, which result in a significant loss of energy efficiency. In the paper, we propose a switch selection network to solve this problem, where the analog component of beamspace MIMO systems is realized by a sub-connected switch network rather than the PS. Based on the proposed architecture, an optimal hybrid cross-entropy (HCE) based hybrid precoding scheme is designed to maximize the achieveable sum-rate, where the probability distribution of the hybrid precoder is updated by minimizing CE with unadjusted probabilities and smoothing constant. Simulation results show that the proposed HCE-based hybrid precoding can not only effectively achieve the satisfied sum-rate performance, but also outperform the PSs schemes with regard to energy efficiency.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Zhang, Professor Lei
• Authors: Ding, T., Zhao, Y., Lixin, L., Zhang, L., and Hu, D.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• ISSN: 2576-7828
• ISBN: 9781728105352

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