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 language | English (US) |
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Article number | 9076069 |
Pages (from-to) | 1771-1774 |
Number of pages | 4 |
Journal | IEEE Communications Letters |
Volume | 24 |
Issue number | 8 |
DOIs | |
State | Published - 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