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Physical layer security of underlay cognitive radio using maximal ratio combining

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Abstract

We investigate the secrecy outage performance of maximal ratio combining (MRC) in cognitive radio networks over Rayleigh fading channels. In a single-input multiple-output wiretap system, we consider a secondary user (SU-TX) that transmits confidential messages to another secondary user (SU-RX) equipped with M (M ≥ 1) antennas where the MRC technique is adopted to improve its received signal-to-noise ratio. Meanwhile, an eavesdropper equipped with N (N ≥ 1) antennas adopts the MRC scheme to overhear the information between SU-TX and SU-RX. SU-TX adopts the underlay strategy to guarantee the service quality of the primary user without spectrum sensing. We derive the closed-form expressions for an exact and asymptotic secrecy outage probability.

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Authors and Affiliations

  1. School of Electronic and Information Engineering, Southwest University, Chongqing, 400715, China

    Hui Zhao, Dan-yang Wang, Ya-** Liu & Gao-feng Pan

  2. School of Electrical & Electronic Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK

    Chao-qing Tang

  3. School of Mathematics and Statistics, Southwest University, Chongqing, 400715, China

    Ting-ting Li

  4. School of Engineering, University of Warwick, Coventry, CV4 7AL, UK

    Yun-fei Chen

Authors
  1. Hui Zhao
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  2. Dan-yang Wang
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  3. Chao-qing Tang
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  4. Ya-** Liu
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  5. Gao-feng Pan
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  6. Ting-ting Li
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  7. Yun-fei Chen
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Corresponding author

Correspondence to Gao-feng Pan.

Additional information

Project supported in part by the National Natural Science Foundation of China (Nos. 61401372 and 61531016), the Research Fund for the Doctoral Program of Higher Education of China (No. 20130182120017), the Natural Science Foundation of CQ CSTC (No. cstc2013jcyjA40040), and the Fundamental Research Funds for the Central Universities, China (No. XDJK2015B023)

A preliminary version was presented at the 7th IEEE International Conference on Communication Software and Networks, China, June 6–7, 2015

ORCID: Gao-feng PAN, http://orcid.org/0000-0003-1008-5717

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Zhao, H., Wang, Dy., Tang, Cq. et al. Physical layer security of underlay cognitive radio using maximal ratio combining. Frontiers Inf Technol Electronic Eng 17, 929–937 (2016). https://doi.org/10.1631/FITEE.1500351

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  • DOI: https://doi.org/10.1631/FITEE.1500351

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