Outage analysis of spectrum sharing relay systems with multiple secondary destinations under primary user's interference

Yuzhen Huang, Fawaz Al-Qahtani, Qihui Wu, Caijun Zhong, Jinlong Wang, Hussein Alnuweiri

Research output: Contribution to journalArticle

28 Citations (Scopus)


In this paper, we investigate the impact of multiuser diversity on the performance of secondary users (SUs) in dual-hop decode-and-forward (DF) spectrum sharing systems over Nakagami- m fading channels, taking into consideration the interference from primary users (PUs). In particular, we present a detailed performance comparison for two different opportunistic scheduling algorithms, i.e., the signal-to-noise ratio (SNR)-based scheduling algorithm and the signal-to-interference-plus-noise ratio (SINR)-based scheduling algorithm. For both scheduling algorithms, exact and asymptotic analytical expressions for the outage probability are derived. Our findings show that the SINR-based scheduling algorithm always outperforms the SNR-based scheduling algorithm. Nevertheless, when the number of destination is large, both scheduling algorithms attain almost the same outage performance, which suggests that, in such a scenario, the SNR-based scheduling algorithm is preferred because it requires less channel state information.

Original languageEnglish
Article number6702521
Pages (from-to)3456-3463
Number of pages8
JournalIEEE Transactions on Vehicular Technology
Issue number7
Publication statusPublished - 1 Sep 2014



  • Nakagami-m fading
  • opportunistic scheduling
  • outage probability
  • spectrum sharing relay system

ASJC Scopus subject areas

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

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