Flexible Generalized Spatial Modulation for Visible Light Communications

Mohamed Al-Nahhal; Ertugrul Basar; Murat Uysal

doi:10.1109/TVT.2020.3047652

Flexible Generalized Spatial Modulation for Visible Light Communications

Mohamed Al-Nahhal, Ertugrul Basar, Murat Uysal

Engineering

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

Abstract

Adaptive spatial modulation (ASM) varies the modulation size across the transmit light-emitting diodes (LEDs) to improve the overall spectral efficiency of visible light communication (VLC) systems. This article proposes a novel ASM scheme, referred to as flexible generalized spatial modulation (FGSM), for VLC systems. The proposed FGSM system changes the modulation sizes over the LEDs and the number of active LEDs, to improve the average symbol error rate (SER) and spectral efficiency compared to ASM with a fixed overall number of LEDs. The modulation sizes are selected in order to optimize the average SER under a predefined spectral efficiency value. A closed-form expression of approximate SER is derived along with decoding complexity calculations for the proposed system. Numerical results are provided to confirm the superiority of the proposed system and to support theoretical derivations.

Original language	English (US)
Article number	9309358
Pages (from-to)	1041-1045
Number of pages	5
Journal	IEEE Transactions on Vehicular Technology
Volume	70
Issue number	1
DOIs	https://doi.org/10.1109/TVT.2020.3047652
State	Published - Jan 2021

Keywords

Visible light communication
adaptive modulation sizes
decoding complexity
generalized spatial modulation

ASJC Scopus subject areas

Aerospace Engineering
Electrical and Electronic Engineering
Computer Networks and Communications
Automotive Engineering

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10.1109/TVT.2020.3047652

Cite this

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title = "Flexible Generalized Spatial Modulation for Visible Light Communications",

abstract = "Adaptive spatial modulation (ASM) varies the modulation size across the transmit light-emitting diodes (LEDs) to improve the overall spectral efficiency of visible light communication (VLC) systems. This article proposes a novel ASM scheme, referred to as flexible generalized spatial modulation (FGSM), for VLC systems. The proposed FGSM system changes the modulation sizes over the LEDs and the number of active LEDs, to improve the average symbol error rate (SER) and spectral efficiency compared to ASM with a fixed overall number of LEDs. The modulation sizes are selected in order to optimize the average SER under a predefined spectral efficiency value. A closed-form expression of approximate SER is derived along with decoding complexity calculations for the proposed system. Numerical results are provided to confirm the superiority of the proposed system and to support theoretical derivations.",

keywords = "Visible light communication, adaptive modulation sizes, decoding complexity, generalized spatial modulation",

author = "Mohamed Al-Nahhal and Ertugrul Basar and Murat Uysal",

note = "Funding Information: Manuscript received January 21, 2020; revised August 4, 2020 and November 20, 2020; accepted December 20, 2020. Date of publication December 28, 2020; date of current version February 12, 2021. This work was supported by the Turkish Scientific and Research Council under Grant 215E311. The review of this article was coordinated by Prof. Yu T. Su. (Corresponding author: Mohamed Al-Nahhal.) Mohamed Al-Nahhal and Murat Uysal are with the Department of Electrical and Electronics Engineering, Ozyegin University, Istanbul 34794, Turkey (e-mail: mohamed.al-nahhal@ozu.edu.tr; murat.uysal@ozyegin.edu.tr). Publisher Copyright: {\textcopyright} 1967-2012 IEEE.",

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N1 - Funding Information: Manuscript received January 21, 2020; revised August 4, 2020 and November 20, 2020; accepted December 20, 2020. Date of publication December 28, 2020; date of current version February 12, 2021. This work was supported by the Turkish Scientific and Research Council under Grant 215E311. The review of this article was coordinated by Prof. Yu T. Su. (Corresponding author: Mohamed Al-Nahhal.) Mohamed Al-Nahhal and Murat Uysal are with the Department of Electrical and Electronics Engineering, Ozyegin University, Istanbul 34794, Turkey (e-mail: mohamed.al-nahhal@ozu.edu.tr; murat.uysal@ozyegin.edu.tr). Publisher Copyright: © 1967-2012 IEEE.

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N2 - Adaptive spatial modulation (ASM) varies the modulation size across the transmit light-emitting diodes (LEDs) to improve the overall spectral efficiency of visible light communication (VLC) systems. This article proposes a novel ASM scheme, referred to as flexible generalized spatial modulation (FGSM), for VLC systems. The proposed FGSM system changes the modulation sizes over the LEDs and the number of active LEDs, to improve the average symbol error rate (SER) and spectral efficiency compared to ASM with a fixed overall number of LEDs. The modulation sizes are selected in order to optimize the average SER under a predefined spectral efficiency value. A closed-form expression of approximate SER is derived along with decoding complexity calculations for the proposed system. Numerical results are provided to confirm the superiority of the proposed system and to support theoretical derivations.

AB - Adaptive spatial modulation (ASM) varies the modulation size across the transmit light-emitting diodes (LEDs) to improve the overall spectral efficiency of visible light communication (VLC) systems. This article proposes a novel ASM scheme, referred to as flexible generalized spatial modulation (FGSM), for VLC systems. The proposed FGSM system changes the modulation sizes over the LEDs and the number of active LEDs, to improve the average symbol error rate (SER) and spectral efficiency compared to ASM with a fixed overall number of LEDs. The modulation sizes are selected in order to optimize the average SER under a predefined spectral efficiency value. A closed-form expression of approximate SER is derived along with decoding complexity calculations for the proposed system. Numerical results are provided to confirm the superiority of the proposed system and to support theoretical derivations.

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Flexible Generalized Spatial Modulation for Visible Light Communications

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