A Low Complexity Algorithm for Selective AF-OFDM System

Hanan Al-Tous, Imad Barhumi

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


A low complexity algorithm is proposed for joint allocation of power profiles at the source and relay nodes and subcarrier assignment for single user amplify and forward (AF) cooperative communication using orthogonal frequency division multiplexing (OFDM) system. The relay uses AF cooperative relaying to transmit messages on a set of available subcarriers with diversity. The remaining subcarriers are used for direct transmission without diversity. The objective is to allocate the resources to maximize the 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. The algorithm is based on an ordering of the channel gain's ratio and splitting them into two partitions, then searching for the partition that maximizes the sum rate. Simulation results demonstrate the merit of the proposed algorithm.

Original languageEnglish
Article number7022779
JournalIEEE Vehicular Technology Conference
Issue numberJanuary
Publication statusPublished - 2014
Event2014 79th IEEE Vehicular Technology Conference, VTC 2014-Spring - Seoul, Korea, Republic of
Duration: May 18 2014May 21 2014


  • AF Cooperative Communications
  • OFDM
  • Resource Allocation
  • Selective AF
  • Sum Rate

ASJC Scopus subject areas

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


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