Performance Analysis of Dual-Hop Underwater Wireless Optical Communication Systems Over Mixture Exponential-Generalized Gamma Turbulence Channels

Zedini, Emna; Kammoun, Abla; Soury, Hamza; Hamdi, Mounir; Alouini, Mohamed‐Slim

doi:10.1109/tcomm.2020.3006146

Cited by 54 publications

(29 citation statements)

References 46 publications

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“…Furthermore, in [5], closed-form expressions for the outage probability (OP), average bit error rate (ABER), and average channel capacity (ACC) were derived. Using the EGG distribution, the performance of dual-hop UWOC systems with a fixedgain AF relay was studied in [6]. Finally, relying on the EGG fading model, the performance of mixed RF-UWOC systems was investigated in [7]- [9].…”

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confidence: 99%

On the Performance of RIS-Assisted Dual-Hop Mixed RF-UWOC Systems

Yang

Costa

et al. 2021

IEEE Trans. Cogn. Commun. Netw.

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In this paper, we investigate the performance of a reconfigurable intelligent surface (RIS)-assisted dual-hop mixed radio-frequency underwater wireless optical communication (RF-UWOC) system. An RIS is an emerging and low-cost technology that aims to enhance the strength of the received signal, thus improving the system performance. In the considered system setup, a ground source does not have a reliable direct link to a given marine buoy and communicates with it through an RIS installed on a building. In particular, the buoy acts as a relay that sends the signal to an underwater destination. In this context, analytical expressions for the outage probability (OP), average bit error rate (ABER), and average channel capacity (ACC) are derived assuming fixed-gain amplify-and-forward (AF) and decode-and-forward (DF) relaying protocols at the marine buoy. Moreover, asymptotic analyses of the OP and ABER are carried out in order to gain further insights from the analytical frameworks. In particular, the system diversity order is derived and it is shown to depend on the RF link parameters and on the detection schemes of the UWOC link. Finally, it is demonstrated that RIS-assisted systems can effectively improve the performance of mixed dual-hop RF-UWOC systems. Index Terms-Underwater wireless optical communications, reconfigurable intelligent surface, relaying systems, mixed dualhop transmission schemes. I. INTRODUCTION U NDERWATER wireless optical communication (UWOC) is a promising technique for beyond fifth-generation (B5G) wireless networks because it provides higher data rates and better confidentiality than traditional underwater wireless communication systems [1], [2]. In UWOC, however, the scattering and absorption of the optical signal caused by various components in the seawater may have an adverse effect on the transmission of the optical signal, and these issues need to be properly evaluated. Along the years, mixed dualhop transmissions assuming radio-frequency (RF) and UWOC links have been widely investigated. Specifically, the secrecy performance of mixed RF-UWOC systems was investigated in [3]. In [4], mixed RF-UWOC relaying networks with both decode-and-forward (DF) and amplify-and-forward (AF) capabilities were analyzed. In [5], the authors proposed a unified

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On the Performance of RIS-Assisted Dual-Hop Mixed RF-UWOC Systems

Yang

Costa

et al. 2021

IEEE Trans. Cogn. Commun. Netw.

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“…As a result, UWOC has found applications in oil exploration, environmental monitoring, port security, oceanographic data collections, etc. Nevertheless, the UWOC channel suffers from absorption, scattering, as well as underwater optical turbulence [14]. Absorption limits the received intensity signal, and the scattering causes misalignment of the transmit beam from the receiver line-of-sight (LOS) [15].…”

Section: Introductionmentioning

confidence: 99%

“…Absorption limits the received intensity signal, and the scattering causes misalignment of the transmit beam from the receiver line-of-sight (LOS) [15]. The underwater optical turbulence occurs as a result of variation in the water refractive index due to change in temperature, salinity variation, and air bubbles which in turn affect the optical signal propagation [14,16].…”

Section: Introductionmentioning

confidence: 99%

“…Thus, combining the advantages of UWOC and radio frequency (RF) simultaneously is achievable through the relaying technique [18]. Based on this, a few research works have studied the performance of a dual-hop UWOC/RF system over different channel distributions compared to a mixed free space optical (FSO)/RF system [14,16,19,20]. In this case , the performance analysis of a dual-hop RF-UWOC system was evaluated in [20] under the heterodyne and IMDD detection techniques.…”

Section: Introductionmentioning

confidence: 99%

“…In [16], a unified statistical model was proposed to characterize the turbulence-induced fading in UWOC channels using experimental data. The average bit error rate and the outage probability performance of a dual-hop underwater system over a mixture exponential-Generalized Gamma turbulence channel was investigated in [14]. Moreover, the performance analysis of UWOC system relayed over the α − μ fading channel was studied in [19], where outage probability and capacity of the system were obtained.…”

Section: Introductionmentioning

confidence: 99%

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This letter investigates a two‐hop underwater optical wireless communication‐radio frequency setup consisting of an autonomous underwater vehicle (AUV), a communication buoy, and an onshore data center (ODC). The information transmission between AUV and ODC occurs in two phases. In the first phase, the AUV communicates to the buoy over the optical wireless link. The buoy harvests the energy by using simultaneous lightwave information and power transfer and also decodes the information. In the subsequent phase, the buoy transmits the decoded information to the ODC over an RF link by utilizing the harvested energy at the first phase. A joint optimization problem is proposed to minimize the total optical energy consumption at the AUV by optimally selecting the DC‐bias and the time allocated to the first and second phases subject to the minimum required end‐to‐end rate. Due to the non‐convexity of the original problem, an alternative approach is used to make it convex. For certain system parameters, our results show a significant energy savings of J at the required rate of 2 bits per channel use.

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Performance Analysis of Dual-Hop Underwater Wireless Optical Communication Systems Over Mixture Exponential-Generalized Gamma Turbulence Channels

Cited by 54 publications

References 46 publications

On the Performance of RIS-Assisted Dual-Hop Mixed RF-UWOC Systems

On the Performance of RIS-Assisted Dual-Hop Mixed RF-UWOC Systems

Performance Analysis of Reconfigurable Intelligent Surface Assisted Underwater Optical Communication System

Energy‐efficient UOWC‐RF systems with SLIPT

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