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

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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 languageEnglish
Article number3378
Pages (from-to)1-13
Number of pages13
JournalSensors
Volume20
Issue number12
DOIs
Publication statusPublished - 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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    Jiang, H., Qiu, H., He, N., Zhao , Z., Popoola, W., Ahmad, Z., & Rajbhandari , S. (2020). LDPC-Coded CAP with Spatial Diversity for UVLC Systems over Generalized-Gamma Fading Channel. Sensors, 20(12), 1-13. [3378]. https://doi.org/10.3390/s20123378