Scan and wait combining (SWC): A switch and examine strategy with a performance-delay tradeoff

Mohamed Slim Alouini*, Marvin K. Simon, Hong Chuan Yang

*Corresponding author for this work

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

5 Scopus citations

Abstract

This paper proposes and analyzes an alternative form of switch and examine combining, namely one that waits for a channel coherence time if all the available diversity paths fail to meet a predetermined minimum quality requirement. This scanning through the available diversity paths followed by waiting is repeated indefinitely until a path with an acceptable quality is found. The performance of the resulting "scan and wait" combining (SWC) scheme is studied in terms of its average probability of error and ergodic capacity. The paper looks also into (i) the delay associated with SWC by deriving the statistics of the waiting time needed before satisfactory transmission occurs and (ii) the underlying complexity by studying the statistics of the number of diversity paths estimated per channel access. Selected numerical examples show that, for a fixed average number of channel estimates per channel access, SWC outperforms traditional diversity combining schemes at the expense of a negligible time delay.

Original languageEnglish (US)
Title of host publication2004 First International Symposium on Control, Communications and Signal Processing, ISCCSP 2004
Pages153-158
Number of pages6
StatePublished - 2004
Externally publishedYes
Event2004 First International Symposium on Control, Communications and Signal Processing, ISCCSP 2004 - Hammamet, Tunisia
Duration: Mar 21 2004Mar 24 2004

Other

Other2004 First International Symposium on Control, Communications and Signal Processing, ISCCSP 2004
CountryTunisia
CityHammamet
Period03/21/0403/24/04

ASJC Scopus subject areas

  • Engineering(all)

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