Performance analysis of adaptive L-QAM for opportunistic decode-and-forward relaying

Salama S. Ikki, Osama Amin, Murat Uysal

Research output: Contribution to journalConference articlepeer-review


In this paper, we investigate the performance of constant-power adaptive L-ary quadrature modulation (L-QAM) for an opportunistic decode-and-forward (DF) relaying scheme. Specifically, we adopt adaptive five-mode L-QAM with fixed and optimum switching and derive expressions for the error rate, outage probability and spectral efficiency over both independent and identical (i.i.d.) and independent and non-identical (i.n.d.) Rayleigh fading channels.

Original languageEnglish (US)
JournalIEEE Vehicular Technology Conference
StatePublished - 2010
Event2010 IEEE 71st Vehicular Technology Conference, VTC 2010-Spring - Taipei, Taiwan, Province of China
Duration: May 16 2010May 19 2010


  • Adaptive modulation
  • Cooperative diversity
  • Decode-and-forward
  • Rayleigh fading channels

ASJC Scopus subject areas

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


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