Selective diversity with discrete power loading over rayleigh fading channels

Fadel F. Digham*, Mohamed Slim Alouini

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

This paper revisits a selective diversity system with optimum continuous power loading which was originally proposed by Skinner and Cavers in [1] and which yields minimum average probability of error when the diversity paths are orthogonal. In a first part, the paper offers an alternative look at the system considered in [1] and provides some slightly modified results. In a second part, the paper considers a practical implementation of this system by proposing an optimum discrete power loading scheme. The problem in its discrete fashion is to minimize the average bit error rate for a given total energy constraint resulting in an optimum discrete power loading as a function of the channel status. This discrete implementation of the scheme makes the system more robust against imperfect and/or outdated channel estimates. In addition in this case only the index of the adaptation region (rather than the instantaneous channel status) has to be sent back to the transmitter.

Original languageEnglish (US)
Pages (from-to)2762-2766
Number of pages5
JournalIEEE International Conference on Communications
Volume5
DOIs
StatePublished - Jan 1 2004
Event2004 IEEE International Conference on Communications - Paris, France
Duration: Jun 20 2004Jun 24 2004

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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