Security Optimization of Exposure Region-based Beamforming with a Uniform Circular Array

Yuanrui Zhang, Roger Woods, Youngwook Ko, Alan Marshall, Junqing Zhang

Research output: Contribution to journalArticle

5 Citations (Scopus)
176 Downloads (Pure)

Abstract

This paper investigates the impact of a uniform circular array (UCA) in the context of wireless security via exposure region-based beamforming. An improvement is demonstrated for the security metric proposed in our previous paper, namely, the spatial secrecy outage probability (SSOP), by optimizing the configuration of the UCA. Our previous paper focused on formalizing the SSOP concept and exploring its applicability using a uniform linear array example. This paper proposes the UCA as a superior candidate because it is more robust against the effects of mutual coupling. The UCA’s SSOP configuration is explored and a special expression is derived from the general expression for the first time, and a closed-form upper bound is then generated to facilitate analysis. By carefully designing the UCA structure particularly the radius, an SSOP optimization algorithm is derived and explored for mutual coupling. It is shown that the information leakage to eavesdroppers is reduced while the legitimate user’s received signal quality is enhanced due to the use of beamforming.

Original languageEnglish
Pages (from-to)2630-2641
Number of pages12
JournalIEEE Transactions on Communications
Volume66
Issue number6
Early online date01 Nov 2017
DOIs
Publication statusPublished - 01 Jun 2018

Keywords

  • Antenna arrays
  • Array signal processing
  • beamforming
  • Channel capacity
  • Erbium
  • exposure region
  • Mutual coupling
  • Optimization
  • Physical layer security
  • Security
  • spatial secrecy outage probability
  • uniform circular array

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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