Capacity Analysis of Orbital Angular Momentum Wireless Channels

Liang Wang, Xiaohu Ge, Ran Zi, Cheng-Xiang Wang

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Abstract

The orbital angular momentum (OAM) technology is able to provide a new degree of freedom for wireless communication systems. The energy of OAM waves is focused within a circle region surrounding the beam axis, which makes the propagation gains inside and outside the circle region different. However, in the existing literatures, the propagation gains inside and outside the circle region are assumed to be the same. Therefore, the impact of OAM waves’ spatial energy distribution on the capacity of OAM wireless communication systems has not been fully investigated. Considering the spatial energy distribution characteristics of OAM waves, in this paper an OAM wireless channel model is proposed. Based on the proposed OAM wireless channel model, the capacity of OAM-based multiple-input multiple-output (MIMO) communication system is analytically derived. Simulation results indicate that the capacity of OAM-based MIMO system outperforms the capacity of conventional MIMO system when the transmission distance is larger than a specific threshold. Our results provide a basic capacity model for OAM-based MIMO communication systems.

Original languageEnglish
Pages (from-to)23069-23077
Number of pages9
JournalIEEE Access
Volume5
DOIs
Publication statusPublished - 17 Oct 2017

Keywords

  • capacity
  • Channel models
  • Manganese
  • MIMO
  • multiple-input multiple-output (MIMO)
  • Orbital angular momentum (OAM)
  • Receiving antennas
  • Transmitting antennas
  • wireless channel model
  • Wireless communication

ASJC Scopus subject areas

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

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