Performance analysis of multiuser selection diversity

Lin Yang*, Mohamed-Slim Alouini

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

In this paper, the authors study the performance of scheduling algorithms exploiting the multiuser selection diversity. Schedulers with affordable-rate transmission and adaptive transmission based on the absolute signal-to-noise ratio (SNR) and the normalized SNR are considered. In contrast to previous studies on the multiuser-diversity systems, the channel dynamics is taken into consideration in this paper by a novel formulation based on the level crossing analysis of stochastic processes. Then, the authors make the connection between the Doppler frequency shift, which indicates the channel temporal correlation, and the average (channel) access time, the average waiting time (AWT) between accesses, and the average access rate (AAR) of active users. These properties are important for the scheduler design, especially for applications where delay is a concern. In addition, analytical expressions for the system throughput and the degree of fairness (DOF) when users have nonidentical average channel conditions are presented. These expressions quantify the effect of disparateness in users' average channel conditions on the system performance.

Original languageEnglish (US)
Pages (from-to)1003-1018
Number of pages16
JournalIEEE Transactions on Vehicular Technology
Volume55
Issue number3
DOIs
StatePublished - May 1 2006

Keywords

  • Adaptive transmission
  • Average access rate (AAR)
  • Average access time (AAT)
  • Capacity
  • Degree of fairness
  • Fading channels
  • Multiuser selection diversity
  • Spectral efficiency

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Applied Mathematics
  • Electrical and Electronic Engineering

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