Cooperative communications: Fundamental limits and practical implementation

Arnab Chakrabarti, Ashutosh Sabharwal, Behnaam Aazhang

Research output: Chapter in Book/Report/Conference proceedingChapter

20 Scopus citations


This chapter summarizes theoretically achievable gains and the construction of practical codes for user-cooperation. Most of these results relate to the relay channel, which is a three-terminal channel that captures the essence of usercooperation and serves as one of the primary building blocks for cooperation on a larger scale. In investigating the fundamental limits of relaying, we present information-theoretic results on the achievable throughput of relay channel in mutual-information terms. We also include results on Gaussian channels, and for the practically important case of half-duplex relaying. In the domain of relay coding, we specifically discuss pragmatic code constructions for half as well as full-duplex relaying, using LDPC codes as components.

Original languageEnglish (US)
Title of host publicationCooperation in Wireless Networks
Subtitle of host publicationPrinciples and Applications: Real Egoistic Behavior is to Cooperate!
PublisherSpringer Netherlands
Number of pages40
ISBN (Print)9781402047107
StatePublished - 2006


  • amplify-and-forward
  • broadcast
  • coding
  • decode-and-forward
  • estimate-and-forward
  • information theory
  • LDPC
  • max-flow min-cut
  • multiple access
  • relay
  • user cooperation
  • wireless communication

ASJC Scopus subject areas

  • Engineering(all)


Dive into the research topics of 'Cooperative communications: Fundamental limits and practical implementation'. Together they form a unique fingerprint.

Cite this