Artificial Noisy MIMO Systems under Correlated Scattering Rayleigh Fading-A Physical Layer Security Approach

Yiliang Liu, Hsiao Hwa Chen, Liangmin Wang, Weixiao Meng

Research output: Contribution to journalArticlepeer-review

Abstract

The existing investigations on artificial noise (AN) security systems assumed that only null spaces are used to send AN signals, and all eigen-subchannels should be used to transmit messages. Our previous work proposed an AN scheme that allocates some of eigen-subchannels to transmit AN signals for improving secrecy rates. Nevertheless, our previous work considered only uncorrelated MIMO Rayleigh fading channels. In fact, the correlations among antennas exist in realistic scattering channel environments. In this paper, we extend our previous AN scheme to spatially correlated Rayleigh fading channels at both legitimate receiver and eavesdropper sides and derive an exact theoretical expression for the ergodic secrecy rate of the AN scheme, along with an approximate analysis. Both numerical and simulation results show that the proposed AN scheme offers a higher ergodic secrecy rate than the existing schemes, revealing a fact that the correlation among eavesdropper's antennas can potentially improve the secrecy rate of an MIMO system.

Original languageEnglish
Article number8753515
Pages (from-to)2121-2132
Number of pages12
JournalIEEE Systems Journal
Volume14
Issue number2
DOIs
Publication statusPublished - 2020 Jun

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Information Systems
  • Computer Science Applications
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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