LDPC-Coded CAP with Spatial Diversity for UVLC Systems over Generalized-Gamma Fading Channel

Hongyan Jiang; Hongbing Qiu; Ning He; Zhonghua  Zhao; Wasiu Popoola; Zahir Ahmad; Sujan  Rajbhandari

doi:10.3390/s20123378

LDPC-Coded CAP with Spatial Diversity for UVLC Systems over Generalized-Gamma Fading Channel

Hongyan Jiang, Hongbing Qiu, Ning He, Zhonghua Zhao , Wasiu Popoola, Zahir Ahmad, Sujan Rajbhandari

School of Computing, Electronics and Maths

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Abstract

In this paper, low-density parity-check (LDPC)-coded carrierless amplitude and phase (CAP)modulation with spatial diversity is proposed to mitigate turbulence-induced fading in an underwater visible-light communication (UVLC) channel. Generalized-gamma (GG) distribution was used to model the fading, as this model is valid for weak- and strong-turbulence regimes. On the basis of the characteristic function (CHF) of GG random variables, we derived an approximated bit-error rate (BER) for the CAP modulation scheme with spatial diversity and equal-gain combining (EGC). Furthermore, we simulated the performance of the CAP system with diversity and LDPC for various turbulence conditions and validated the analysis. Obtained results showed that the combination of LDPC and spatial diversity is effective in mitigating turbulence-induced fading, especially when turbulence strength is strong.

Original language	English
Article number	3378
Pages (from-to)	1-13
Number of pages	13
Journal	Sensors
Volume	20
Issue number	12
DOIs	https://doi.org/10.3390/s20123378
Publication status	Published - 15 Jun 2020

Bibliographical note

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

Keywords

CAP
GG distribution
LDPC
Turbulence-induced fading
UVLC

ASJC Scopus subject areas

Analytical Chemistry
Biochemistry
Atomic and Molecular Physics, and Optics
Instrumentation
Electrical and Electronic Engineering

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10.3390/s20123378Licence: CC BY

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title = "LDPC-Coded CAP with Spatial Diversity for UVLC Systems over Generalized-Gamma Fading Channel",

abstract = "In this paper, low-density parity-check (LDPC)-coded carrierless amplitude and phase (CAP)modulation with spatial diversity is proposed to mitigate turbulence-induced fading in an underwater visible-light communication (UVLC) channel. Generalized-gamma (GG) distribution was used to model the fading, as this model is valid for weak- and strong-turbulence regimes. On the basis of the characteristic function (CHF) of GG random variables, we derived an approximated bit-error rate (BER) for the CAP modulation scheme with spatial diversity and equal-gain combining (EGC). Furthermore, we simulated the performance of the CAP system with diversity and LDPC for various turbulence conditions and validated the analysis. Obtained results showed that the combination of LDPC and spatial diversity is effective in mitigating turbulence-induced fading, especially when turbulence strength is strong.",

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AU - Jiang, Hongyan

AU - Qiu, Hongbing

AU - He, Ning

AU - Zhao , Zhonghua

AU - Popoola, Wasiu

AU - Ahmad, Zahir

AU - Rajbhandari , Sujan

N1 - This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

PY - 2020/6/15

Y1 - 2020/6/15

N2 - In this paper, low-density parity-check (LDPC)-coded carrierless amplitude and phase (CAP)modulation with spatial diversity is proposed to mitigate turbulence-induced fading in an underwater visible-light communication (UVLC) channel. Generalized-gamma (GG) distribution was used to model the fading, as this model is valid for weak- and strong-turbulence regimes. On the basis of the characteristic function (CHF) of GG random variables, we derived an approximated bit-error rate (BER) for the CAP modulation scheme with spatial diversity and equal-gain combining (EGC). Furthermore, we simulated the performance of the CAP system with diversity and LDPC for various turbulence conditions and validated the analysis. Obtained results showed that the combination of LDPC and spatial diversity is effective in mitigating turbulence-induced fading, especially when turbulence strength is strong.

AB - In this paper, low-density parity-check (LDPC)-coded carrierless amplitude and phase (CAP)modulation with spatial diversity is proposed to mitigate turbulence-induced fading in an underwater visible-light communication (UVLC) channel. Generalized-gamma (GG) distribution was used to model the fading, as this model is valid for weak- and strong-turbulence regimes. On the basis of the characteristic function (CHF) of GG random variables, we derived an approximated bit-error rate (BER) for the CAP modulation scheme with spatial diversity and equal-gain combining (EGC). Furthermore, we simulated the performance of the CAP system with diversity and LDPC for various turbulence conditions and validated the analysis. Obtained results showed that the combination of LDPC and spatial diversity is effective in mitigating turbulence-induced fading, especially when turbulence strength is strong.

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