Outage reduction in cooperative networks with limited feedback

Shaolei Ren, Khaled Letaief, José Roberto B De Marca

Research output: Contribution to journalArticle

16 Citations (Scopus)


In this paper, we propose a limited feedback scheme to improve outage performance for a wireless cooperative decode-and- forward network. Specifically, based on the instantaneous conditions of the source-destination and relay-destination channels, the destination will allocate the transmission time of the source and relay and feed back the allocation result to the source. Both limited and full (or infinite) rate feedback are considered. Under the practical assumption that only imperfect channel estimation is available at the receiver, we analyze the outage performance by deriving upper bounds on the outage probabilities. It will be demonstrated that, even with only one-bit feedback, the proposed feedback scheme can outperform the no feedback case. Furthermore, the outage performance can approach the optimality by exploiting limited (only a small number of bits) uniformly quantized feedback from the destination.

Original languageEnglish
Article number5426506
Pages (from-to)748-752
Number of pages5
JournalIEEE Transactions on Communications
Issue number3
Publication statusPublished - Mar 2010
Externally publishedYes



  • Cooperative networks
  • Decode-and-forward
  • Imperfect channel estimation
  • Limited feedback
  • Outage probability

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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