Adaptive Hybrid M-FSK M-QAM Modulation

Fadel F. Digham*, Mohamed Slim Alouini

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations

Abstract

We propose a variable-rate variable-power scheme which employs both non-coherent M-ary frequency shift keying (M-FSK) and M-ary quadrature amplitude modulation (M-QAM). The idea is that adaptive M-FSK is used when the M-QAM system declares an outage. The goal is to provide a better channel utilization and a reliable link of communication even at very bad channel conditions. We consider this hybrid system design by maximizing its spectral efficiency for given constraints on average power transmission and bit error rate. As a result, we obtain power and bit loading functions for both the M-FSK and M-QAM schemes which are mutual and channel-gain dependents.

Original languageEnglish (US)
Title of host publicationIEEE Pacific RIM Conference on Communications, Computers, and Signal Processing - Proceedings
EditorsF. Gebali
Pages964-967
Number of pages4
VolumeII
StatePublished - 2003
Externally publishedYes
Event2003 IEEE Pacific Rim Conference on Communications Computers and Signal Processing (PACRIM 2003) - Victoria, B.C., Canada
Duration: Aug 28 2003Aug 30 2003

Other

Other2003 IEEE Pacific Rim Conference on Communications Computers and Signal Processing (PACRIM 2003)
CountryCanada
CityVictoria, B.C.
Period08/28/0308/30/03

ASJC Scopus subject areas

  • Signal Processing
  • Computer Networks and Communications

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