Adaptive two-way relaying and outage analysis

Qiang Li, See Ho Ting, Ashish Pandharipande, Yang Han

Research output: Contribution to journalArticleAcademicpeer-review

133 Citations (Scopus)


This paper analyzes the outage performance of cooperative protocols for the two-way relaying model in which a half-duplex relay assists in the bi-directional communication of two terminals. We first define the outage events and derive closed form results for the outage probabilities of conventional nonadaptive Amplify-and-Forward (AF) and Decode-and-Forward (DF) two-way relaying protocols.We then consider a simple adaptive protocol in the two-way relaying scenario, which switches between AF and DF depending on the decodability of the two bi-directional data streams at the relay. We also derive the outage probability for this adaptive scheme in closed form expressions, and our results show that it always outperforms the non-adaptive schemes. All the closed form results derived in this paper are applicable to arbitrary channel gains between terminals.

Original languageEnglish
Article number5090009
Pages (from-to)3288-3299
Number of pages12
JournalIEEE Transactions on Wireless Communications
Issue number6
Publication statusPublished - Jun 2009
Externally publishedYes


  • Amplify-and-forward
  • Bi-directiona l
  • Decode-and-forward
  • Half-duplex
  • Outageprobability
  • Two-wayrelaying


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