Large scale antenna system with hybrid digital and analog beamforming structure

Shuangfeng Han, Chih Lin Io, Corbett Rowell, Zhikun Xu, Sen Wang, Zhengang Pan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

35 Citations (Scopus)

Abstract

Large scale antenna systems (LSAS) are expected to significantly enhance the energy efficiency (EE) and spectrum efficiency (SE) of wireless communication systems. However, there are many open issues regarding the implementation of digital beamforming (BF) structures: calibration, complexity, and cost. In a practical LSAS deployment, hybrid digital and analog BF structures with active antennas can be an alternative choice. In this paper, an N (the number of transceivers) by M (the number of active antennas per transceiver) hybrid BF structure is investigated, where the analog BF is performed per transceiver and digital BF is performed across N transceivers. Analysis of the N by M BF structure includes: the optimal analog and digital BF design, EE-SE relationship at the green point (i.e. the point with highest EE) in EE-SE curve, impact of N on EE performance at a given SE value, and impact of N on the green point EE. Numerical simulations are provided to support the analysis.

Original languageEnglish
Title of host publication2014 IEEE International Conference on Communications Workshops, ICC 2014
PublisherIEEE Computer Society
Pages842-847
Number of pages6
ISBN (Print)9781479946402
DOIs
Publication statusPublished - Jan 1 2014
Event2014 IEEE International Conference on Communications Workshops, ICC 2014 - Sydney, NSW, Australia
Duration: Jun 10 2014Jun 14 2014

Publication series

Name2014 IEEE International Conference on Communications Workshops, ICC 2014

Other

Other2014 IEEE International Conference on Communications Workshops, ICC 2014
CountryAustralia
CitySydney, NSW
Period6/10/146/14/14

Keywords

  • LSAS
  • active antenna
  • analog beamforming
  • digital beamforming
  • energy efficiency
  • hybrid beamforming
  • spectrum efficiency

ASJC Scopus subject areas

  • Computer Networks and Communications

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