Cooperative diversity in the presence of a misbehaving relay: Performance analysis

Sintayehu Dehnie, Huserv T. Senear, Nasir Memon

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Cooperative wireless communications offers a new dimension of diversity by emulating transmit antenna diversity to provide reliable communications. In cooperative diversity, single-antenna radios behave as relays between a source and destination, and the performance improvements are due to cooperation of the source and the relay. However, a misbehaving relay can degrade the envisaged performance improvements severely. In practice, there are no mechanisms to ensure adherence of the relay to cooperation strategy. Due to this dependency on relay's behavior cooperative diversity presents a new security challenge at the physical layer. In this paper, we investigate performance of cooperative diversity in the presence of a semi-malicious relay which does not conform to rules of cooperation at all time. The relay behavior is characterized by a probabilistic cooperation model which exploits the uncertainty in the wireless channel. Based on this model, we obtain the performance degradation in cooperative diversity both by analysis and simulation.

Original languageEnglish (US)
Title of host publication2007 IEEE Sarnoff Symposium, SARNOFF
StatePublished - 2007
EventIEEE Sarnoff Symposium, SARNOFF 2007 - Princeton, NJ, United States
Duration: Apr 30 2007May 2 2007

Publication series

Name2007 IEEE Sarnoff Symposium, SARNOFF


OtherIEEE Sarnoff Symposium, SARNOFF 2007
Country/TerritoryUnited States
CityPrinceton, NJ

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Information Systems
  • Electrical and Electronic Engineering
  • Communication


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