Adaptive modulation and combining for bandwidth and power efficient communication over fading channels

Nesrine Belhaj, Noureddine Hamdi, Mohamed Slim Alouini*, Ammar Bouallegue

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Traditional fading mitigation techniques are designed relative to the worst-case channel conditions, resulting in a poor utilization of the spectrum and the available power a good percentage of the time. In contrast, we introduce and investigate in this paper new adaptive modulation and diversity combining techniques that jointly select the most appropriate constellation size and the most suitable diversity branches in response to the channel variation and given a desired bit error rate (BER) requirement. Numerical results show that these newly proposed adaptive modulation and combining schemes can reduce considerably the average receiver channel estimation complexity as well as the power drain from the battery while offering high spectral efficiency and satisfying the desired outage probability and BER requirements.

Original languageEnglish (US)
Pages (from-to)513-529
Number of pages17
JournalWireless Communications and Mobile Computing
Volume7
Issue number4
DOIs
StatePublished - May 1 2007

Keywords

  • Adaptive modulation
  • Diversity techniques
  • Fading channel
  • Selection combining
  • Switched combining

ASJC Scopus subject areas

  • Information Systems
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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