A suboptimal scheme for multi-user scheduling in gaussian broadcast channels

Ammar Zafar, Mohammad Shaqfeh, Mohamed Slim Alouini, Hussein Alnuweiri

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

This work proposes a suboptimal multi-user scheduling scheme for Gaussian broadcast channels which improves upon the classical single user selection, while considerably reducing complexity as compared to the optimal superposition coding with successful interference cancellation. The proposed scheme combines the two users with the maximum weighted instantaneous rate using superposition coding. The instantaneous rate and power allocation are derived in closed-form, while the long term rate of each user is derived in integral form for all channel distributions. Numerical results are then provided to characterize the prospected gains of the proposed scheme.

Original languageEnglish
Article number6880786
Pages (from-to)136-140
Number of pages5
JournalIEEE Signal Processing Letters
Volume22
Issue number2
DOIs
Publication statusPublished - 2015

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Keywords

  • Block-fading
  • broadcast channels
  • multi-user diversity
  • resource allocation
  • superposition coding

ASJC Scopus subject areas

  • Signal Processing
  • Applied Mathematics
  • Electrical and Electronic Engineering

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