Secrecy Outage Performance of Transmit Antenna Selection for MIMO Underlay Cognitive Radio Systems over Nakagami-m Channels

Hongjiang Lei, Chao Gao, Imran Shafique Ansari, Yongcai Guo, Yulong Zou, Gaofeng Pan, Khalid Qaraqe

Research output: Contribution to journalArticle

55 Citations (Scopus)


This paper considers a multiple-input-multiple-output (MIMO) cognitive wiretap system over Nakagami-m channels with generalized selection combining (GSC), where confidential messages transmitted from a multiple-antenna transmitter to a multiple-antenna legitimate receiver are overheard by a multiple-antenna eavesdropper. Depending on whether the source node has the global channel state information (CSI) of both the main and wiretap channels, we investigate the secrecy outage performances of optimal antenna selection (OAS) and suboptimal antenna selection (SAS) schemes for MIMO underlay cognitive radio systems over Nakagami-m channels, and we compare them with the space-time transmission (STT) scheme. The closed-form expressions for the exact and asymptotic secrecy outage probability (SOP) for various schemes are derived. Simulations are conducted to validate the accuracy of our derived analytical results.

Original languageEnglish
Article number7480814
Pages (from-to)2237-2250
Number of pages14
JournalIEEE Transactions on Vehicular Technology
Issue number3
Publication statusPublished - 1 Mar 2017



  • Cognitive radio network (CRN)
  • Nakagami-m fading
  • physical-layer security
  • secrecy outage probability (SOP)
  • transmit antenna selection (TAS)

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Computer Networks and Communications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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