Spectral and Energy Efficient Fast-OFDM with Index Modulation for Optical Wireless Systems

Ali Waqar Azim, Marwa Chafii, Yannis Le Guennec, Laurent Ros

Research output: Contribution to journalArticlepeer-review

Abstract

This letter introduces fast-orthogonal frequency-division multiplexing (FOFDM) with index modulation (IM) based on discrete cosine transform (DCT) for optical wireless systems. For intensity-modulation and direct detection, the proposed approach realizes a real-valued intensity waveform by employing real-valued one-dimensional modulation formats and DCT; and brings about non-negativity via direct current bias. We shall establish that it attains up to 64% higher spectral efficiency (SE) with low order alphabets than conventional IM based approach on discrete Fourier transform and provides better flexibility to address energy efficiency/SE trade-off.

Original languageEnglish (US)
Article number9076069
Pages (from-to)1771-1774
Number of pages4
JournalIEEE Communications Letters
Volume24
Issue number8
DOIs
StatePublished - Aug 2020

Keywords

  • Discrete cosine transform
  • index modulation
  • intensity modulation-direct detection
  • optical wireless systems

ASJC Scopus subject areas

  • Modeling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering

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