Exploiting the finite-alphabet property for cooperative relays

Bin Liu, Biao Chen, Rick S. Blum

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

6 Scopus citations

Abstract

We consider in this paper the design of a cooperative relay strategy by exploiting the £nite-alphabet property of the source. Assuming a single source-sink pair with L relay nodes all communicating in orthogonal channels, we derive necessary conditions for optimal relay signaling that minimizes the error probability at the sink node. The derived conditions allow us to construct an iterative algorithm to £nd the distributed relay signaling that is at least locally optimal. As a byproduct, one can show that the so-called decode-and-forward (DF) relay scheme does not satisfy the necessary condition hence is not optimal in its error probability performance. Indeed, numerical examples show that the proposed scheme provides substantial performance improvement over both DF and the amplify-and-forward approach.

Original languageEnglish (US)
Title of host publication2005 IEEE International Conference on Acoustics, Speech, and Signal Processing,ICASSP '05 - Proceedings - Audio and ElectroacousticsSignal Processing for Communication
PublisherInstitute of Electrical and Electronics Engineers Inc.
PagesIII357-III360
ISBN (Print)0780388747, 9780780388741
DOIs
StatePublished - Jan 1 2005
Event2005 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP '05 - Philadelphia, PA, United States
Duration: Mar 18 2005Mar 23 2005

Publication series

NameICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
VolumeIII
ISSN (Print)1520-6149

Other

Other2005 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP '05
CountryUnited States
CityPhiladelphia, PA
Period3/18/053/23/05

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering

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    Liu, B., Chen, B., & Blum, R. S. (2005). Exploiting the finite-alphabet property for cooperative relays. In 2005 IEEE International Conference on Acoustics, Speech, and Signal Processing,ICASSP '05 - Proceedings - Audio and ElectroacousticsSignal Processing for Communication (pp. III357-III360). [1415720] (ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings; Vol. III). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICASSP.2005.1415720