Resource allocation for two-users DF-OFDMA systems

Hanan Al-Tous, Imad Barhumi

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

1 Citation (Scopus)

Abstract

A low complexity algorithm is proposed to jointly allocate the resources, namely subcarrier assignment and power profiles at the sources and relay nodes for two users decode and forward (DF) relaying scheme using orthogonal frequency division multiple access (OFDMA). The objective is to allocate the resources to maximize the weighted sum rate subject to individual power constraint on each node. We formulate such a problem as subcarrier based resource allocation that seeks joint optimization of subcarrier assignment and power profiles at the source and relay nodes. Using high signal-to-noise- ratio (SNR) approximation, the proposed algorithm splits the subcarriers into two partitions based on channel gains' ordering, where each partition is assigned to one user. The computational complexity of finding the subcarrier assignment that maximizes the weighted sum rate for N subcarriers DF-OFDMA scenario is of O(N). The merits of the proposed algorithm is demonstrated by numerical simulations.

Original languageEnglish
Title of host publication2014 IEEE 80th Vehicular Technology Conference, VTC2014-Fall, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479944491, 9781479944491
DOIs
Publication statusPublished - Nov 24 2014
Event80th IEEE Vehicular Technology Conference, VTC 2014-Fall - Vancouver, Canada
Duration: Sep 14 2014Sep 17 2014

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)1550-2252

Other

Other80th IEEE Vehicular Technology Conference, VTC 2014-Fall
Country/TerritoryCanada
CityVancouver
Period9/14/149/17/14

Keywords

  • DF Cooperative Communications
  • OFDMA
  • Resource Allocation
  • Weighted Sum Rate

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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