首页|Ergodic capacity and error performance of spatial diversity UWOC systems over generalized gamma turbulence channels
Ergodic capacity and error performance of spatial diversity UWOC systems over generalized gamma turbulence channels
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NSTL
Elsevier
? 2021 Elsevier B.V.In this paper, we study the ergodic capacity (EC) and average bit error rate (BER) of spatial diversity underwater wireless optical communications (UWOC) over the generalized gamma (GG) fading channels using quadrature amplitude modulation (QAM) direct current-biased optical orthogonal frequency division multiplexing (DCO-OFDM). We derive closed-form expressions of the EC and BER for the spatial diversity UWOC with the equal gain combining (EGC) at receivers based on the approximation of the sum of independent identical distributed (i.i.d) GG random variables (RVs). Numerical results of EC and BER for QAM DCO-OFDM spatial diversity systems over GG fading channels are presented. The numerical results are shown to be closely matched by the Monte Carlo simulations, verifying the analysis. The study clearly shows the adverse effect of turbulence on the EC & BER and advantage of EGC to overcome the turbulence effect.
Average bit error rateErgodic capacityGeneralized gammaOFDMSpatial diversityUnderwater wireless optical communications
Popoola W.、Ahmad Z.、Rajbhandari S.、Jiang H.、Qiu H.、He N.
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School of Engineering Institute for Digital Communications University of Edinburgh
School of Computing Electronics and Mathematics Coventry University
School of Computer Science and Electronic Engineering Bangor University
School of Information and Communication Guilin University of Electronic Technology
NSTL
Elsevier
