Physical layer security scheme based on power efficient multi-antenna transmitter

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

Abstract

Security is a demanding challenge in wireless systems due to the broadcast nature of the channel. One the other hand security at physical layer can increase overall system's security since it can be combined with other security schemes from higher layers. High throughput required by modern wireless networks can be assured by MIMO (Multiple-input multiple-output), but when high spectral efficiencies are needed multilevel modulations with high peak-to-average power ratios should be used, which may affect efficiency of power amplification. This problem can be avoided by the MISO (Multi input Single Output) transmitter considered here, where transmitted multilevel constellations are the result of the combination of several uncorrelated BPSK (Bi-Phase Shift Keying) components, that are amplified and transmitted independently by an antenna. The constellation shaping done by this transmitter means directivity in the transmitted constellation that can be used to assure security at physical layer. Security as well complexity are assured since any eavesdropper must know the set of coefficients associated to each BPSK component as well as the antenna array configuration. It is shown that the inherent security assured by this transmitter allows secrecy at physical layer. Several examples are analyzed and the corresponding results show the effectiveness of the proposed approach to implement a security scheme at physical layer level.

Original languageEnglish
Title of host publicationPIERS 2015 Prague - Progress In Electromagnetics Research Symposium, Proceedings
PublisherElectromagnetics Academy
Pages2790-2795
Number of pages6
Volume2015-January
ISBN (Electronic) 978-193414230-1
Publication statusPublished - 2015

Keywords

  • Bi-phase shift keying
  • High spectral efficiency
  • MIMO (multiple-input multiple output)
  • Multi input single outputs
  • Multi-antenna transmitters
  • Multilevel modulation
  • Peak to average power ratio
  • Physical layer security

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  • Cite this

    Montezuma de Carvalho, P. M. D. A. B., Dinis, R., & Da Silva, M. M. (2015). Physical layer security scheme based on power efficient multi-antenna transmitter. In PIERS 2015 Prague - Progress In Electromagnetics Research Symposium, Proceedings (Vol. 2015-January, pp. 2790-2795). Electromagnetics Academy.