LACO-OFDM with Index Modulation for Optical Wireless Systems

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

doi:10.1109/LWC.2020.3045119

LACO-OFDM with Index Modulation for Optical Wireless Systems

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

Computer Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

In this letter, we propose layered asymmetrically clipped optical-orthogonal frequency-division multiplexing (LACO-OFDM) with index modulation (IM), i.e., LACO-OFDM-IM for optical wireless systems. In classical LACO-OFDM, the spectral leakage because of out-of-band clipping harmonics increases the baseband bandwidth (BB) resulting in lower spectral efficiencies. For LACO-OFDM-IM, we use IM and optimize the BB by filtering the out-of-band clipping harmonics. This amalgamation of IM and BB optimization leads to better spectral efficiency (SE). Simulation results shall affirm that LACO-OFDM-IM achieves higher SE, affords a comprehensive granularity for SE/energy efficiency trade-off, and outperforms classical alternatives in terms of bit-error-rate in both line-of-sight and time-dispersive channels.

Original language	English (US)
Article number	9295380
Pages (from-to)	664-667
Number of pages	4
Journal	IEEE Wireless Communications Letters
Volume	10
Issue number	3
DOIs	https://doi.org/10.1109/LWC.2020.3045119
State	Published - Mar 2021

Keywords

Discrete Fourier transform
index modulation
intensity-modulation and direct-detection
optical wireless systems
orthogonal frequency-division multiplexing

ASJC Scopus subject areas

Control and Systems Engineering
Electrical and Electronic Engineering

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10.1109/LWC.2020.3045119

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title = "LACO-OFDM with Index Modulation for Optical Wireless Systems",

abstract = "In this letter, we propose layered asymmetrically clipped optical-orthogonal frequency-division multiplexing (LACO-OFDM) with index modulation (IM), i.e., LACO-OFDM-IM for optical wireless systems. In classical LACO-OFDM, the spectral leakage because of out-of-band clipping harmonics increases the baseband bandwidth (BB) resulting in lower spectral efficiencies. For LACO-OFDM-IM, we use IM and optimize the BB by filtering the out-of-band clipping harmonics. This amalgamation of IM and BB optimization leads to better spectral efficiency (SE). Simulation results shall affirm that LACO-OFDM-IM achieves higher SE, affords a comprehensive granularity for SE/energy efficiency trade-off, and outperforms classical alternatives in terms of bit-error-rate in both line-of-sight and time-dispersive channels.",

keywords = "Discrete Fourier transform, index modulation, intensity-modulation and direct-detection, optical wireless systems, orthogonal frequency-division multiplexing",

author = "Azim, {Ali Waqar} and {Le Guennec}, Yannis and Marwa Chafii and Laurent Ros",

note = "Publisher Copyright: {\textcopyright} 2012 IEEE.",

year = "2021",

month = mar,

doi = "10.1109/LWC.2020.3045119",

language = "English (US)",

volume = "10",

pages = "664--667",

journal = "IEEE Wireless Communications Letters",

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AU - Azim, Ali Waqar

AU - Le Guennec, Yannis

AU - Chafii, Marwa

AU - Ros, Laurent

PY - 2021/3

Y1 - 2021/3

N2 - In this letter, we propose layered asymmetrically clipped optical-orthogonal frequency-division multiplexing (LACO-OFDM) with index modulation (IM), i.e., LACO-OFDM-IM for optical wireless systems. In classical LACO-OFDM, the spectral leakage because of out-of-band clipping harmonics increases the baseband bandwidth (BB) resulting in lower spectral efficiencies. For LACO-OFDM-IM, we use IM and optimize the BB by filtering the out-of-band clipping harmonics. This amalgamation of IM and BB optimization leads to better spectral efficiency (SE). Simulation results shall affirm that LACO-OFDM-IM achieves higher SE, affords a comprehensive granularity for SE/energy efficiency trade-off, and outperforms classical alternatives in terms of bit-error-rate in both line-of-sight and time-dispersive channels.

AB - In this letter, we propose layered asymmetrically clipped optical-orthogonal frequency-division multiplexing (LACO-OFDM) with index modulation (IM), i.e., LACO-OFDM-IM for optical wireless systems. In classical LACO-OFDM, the spectral leakage because of out-of-band clipping harmonics increases the baseband bandwidth (BB) resulting in lower spectral efficiencies. For LACO-OFDM-IM, we use IM and optimize the BB by filtering the out-of-band clipping harmonics. This amalgamation of IM and BB optimization leads to better spectral efficiency (SE). Simulation results shall affirm that LACO-OFDM-IM achieves higher SE, affords a comprehensive granularity for SE/energy efficiency trade-off, and outperforms classical alternatives in terms of bit-error-rate in both line-of-sight and time-dispersive channels.

KW - Discrete Fourier transform

KW - index modulation

KW - intensity-modulation and direct-detection

KW - optical wireless systems

KW - orthogonal frequency-division multiplexing

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LACO-OFDM with Index Modulation for Optical Wireless Systems

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Keywords

ASJC Scopus subject areas

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