Outage probability of cooperative diversity systems with opportunistic relaying based on decode-and-forward

Kyu Sung Hwang*, Young Chai Ko, Mohamed Slim Alouini

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

50 Scopus citations


Opportunistic relaying with cooperative diversity has been introduced in [1] as a simple alternative protocol to the distributed space-time coded protocol while achieving the same diversity-multiplexing tradeoff performance as a point-to-point multiple-input multiple-output scheme. In this paper, we derive the upper and lower bounds for the cumulative distribution function of the signal-to-noise ratio per hop, and then provide their probability density function and moment generating function.We also derive approximate but tight closed-form expressions for the lower and upper bounds of the outage probability of opportunistic relaying based on decode-and-forward transmission under the assumption of unbalanced/balanced hops and independent, identically distributed Rayleigh fading channels.

Original languageEnglish (US)
Article number4712728
Pages (from-to)5100-5107
Number of pages8
JournalIEEE Transactions on Wireless Communications
Issue number12
StatePublished - Dec 2008
Externally publishedYes


  • Cooperative diversity
  • Decode-and-forward
  • Opportunistic relaying
  • Outage probability

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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