The multiple-relay channel with estimate-and-forward relaying

Ron Dabora, Sergio D. Servetto

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


In this paper we consider the multiple-relay channel. For this scenario there are two well known results: the decode-and-forward (DAF) result of [Xie and Kumar, 2005] and the estimate-and forward (EAF) result of [Kramer et al., 2005]. However, the FAF result does not lend itself to numerical evaluation due to the large number of parameters to be determined and the non-convex nature of the optimization problem for finding the maximum rate. Therefore, for a given channel we cannot tell what is the EAF rate while keeping the expressions in their general form. We propose a specific assignment for the FAF auxiliary variables that satisfy the feasibility constraints and allow us to obtain an explicit EAF-based rate expression. This expression can be easily computed, and compared against the DAF-based rate. We give an example of a channel where this FAF rate is superior to both the DA F and the point-to-point rates.

Original languageEnglish
Title of host publicationProceedings - IEEE International Symposium on Information Theory, ISIT 2007
Number of pages5
StatePublished - 1 Dec 2007
Externally publishedYes
Event2007 IEEE International Symposium on Information Theory, ISIT 2007 - Nice, France
Duration: 24 Jun 200729 Jun 2007

Publication series

NameIEEE International Symposium on Information Theory - Proceedings
ISSN (Print)2157-8101


Conference2007 IEEE International Symposium on Information Theory, ISIT 2007

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Information Systems
  • Modeling and Simulation
  • Applied Mathematics


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