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  • Research Article
  • Open Access

How to Solve the Problem of Bad Performance of Cooperative Protocols at Low SNR

  • 1Email author,
  • 1 and
  • 1
EURASIP Journal on Advances in Signal Processing20072008:243153

  • Received: 1 June 2007
  • Accepted: 27 August 2007
  • Published:


We propose some new adaptive amplify-and-forward (AF) and decode-and-forward (DF) protocols using a selection. The new selection criterion is a function of the instantaneous capacities of all possible transmission schemes (with or without cooperation). Outage probabilities and simulation results show that the adaptive cooperation protocols solve the problem of bad performance of cooperation protocols at low SNR. Moreover, they improve the asymptotic performance of their corresponding AF and DF protocols.


  • Information Technology
  • Selection Criterion
  • Quantum Information
  • Outage Probability
  • Full Article

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Authors’ Affiliations

Ecole Nationale Superieure des Telecommunications, 46 rue Barrault, Paris Cedex 13, 75013, France


© Charlotte Hucher et al. 2008

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.