Adaptive power loading for multi-relay OFDM regenerative networks with relay selection

Osama Amin, Murat Uysal

Research output: Contribution to journalArticlepeer-review


In this paper, we propose an adaptive power loading algorithm for an OFDM (orthogonal frequency division multiplexing)-based multi-relay regenerative network with relay selection. The proposed scheme is based on selecting the "best" relay(s) according to different strategies and distributing the power adaptively among the subcarriers of source and selected relay(s) as to minimize an upper bound on the bit error rate (BER). Our Monte Carlo simulation results demonstrate superior performance gains through power loading with respect to conventional equal power loading schemes. The effects of imperfect channel estimation and relay location on the BER performance are further discussed.

Original languageEnglish (US)
Article number6118258
Pages (from-to)614-619
Number of pages6
JournalIEEE Transactions on Communications
Issue number3
StatePublished - Mar 2012


  • OFDM
  • cooperative diversity
  • detect-and-forward relaying
  • power allocation
  • relay selection

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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