Journal ArticleDOI
Investigation on effects of system parameters on transmission depth in underwater wireless optical communication
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In this paper, the performance of underwater wireless optical communication (UWOC) with different vertical water channel conditions is experimentally analyzed, where the best fit with the experimental data in terms of received optical power as a function of transmission depth and attenuation is obtained.Abstract:
Performance of underwater wireless optical communication (UWOC) with different vertical water channel conditions is experimentally analyzed. Experiment has been carried out by varying temperature and salinity of the vertical water channel. Underwater vertical channel is modeled by obtaining the best fit with the experimental data in terms of received optical power as a function of transmission depth and attenuation. This mathematical model is used to simulate UWOC system in Optisystem software to analyze the performance of UWOC in terms of Q factor and BER. Analysis has been carried out to obtain maximum reachable transmission depth at different data rates for fixed input power and maximum achievable data rate at different input power for fixed transmission depth. Maximum reachable transmission depth is also analyzed for different modulation index of the amplitude modulator. These analyses are carried out for optimal performance parameters such as Q factor (≥ 6) and BER (≤ 10–9). Apart from Q factor and BER, performance of the UWOC channel is analyzed through eye diagrams obtained at the receiver of the UWOC system in terms of eye height which reflects the quality of signal. This analysis will be helpful for power budgeting, data rate restriction with transmission depth in different water channel conditions to establish vertical UWOC link.read more
Citations
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Journal ArticleDOI
The Impact of Vertical Salinity Gradient on Non-Line-of-Sight Underwater Optical Wireless Communication
TL;DR: In this paper, the authors evaluate the robustness of NLOS in natural waters, and systematically measure the link metrics, such as the bit error ratio, PL, and signal-to-noise ratio (SNR), of water bodies of uniform and nonuniform vertical salinity ranging from 30-40
Journal ArticleDOI
A Testbed for Investigating the Effect of Salinity and Turbidity in the Red Sea on White-LED-Based Underwater Wireless Communication
TL;DR: In this paper , the feasibility of white-LED-based underwater optical wireless communication (UWOC) by considering Red Sea parameters was investigated. But, it was found that the signals are affected less by salinity and more by turbidity but are found to be sufficiently strong to be used for communication in the Red Sea, and it was concluded that white LED is capable of sending data at the maximum possible salinity values of 40 g/L.
Journal ArticleDOI
Diffraction deep neural network based orbital angular momentum mode recognition scheme in oceanic turbulence
TL;DR: A diffractive deep neural network (DDNN) based OAM mode recognition scheme, where the DDNN is trained to capture the features of the intensity distribution of the OAM modes and output the corresponding azimuthal indices and radial indices.
Journal ArticleDOI
Diffraction deep neural network based orbital angular momentum mode recognition scheme in oceanic turbulence
TL;DR: In this article , a diffractive deep neural network (DDNN) based OAM mode recognition scheme was proposed, where the DDNN is trained to capture the features of the intensity distribution of the OAM modes and output the corresponding azimuthal indices and radial indices.
Journal ArticleDOI
Performance Improvement of Turbid Underwater Wireless Optical Communication Link Using Ratiometric Signal Processing
TL;DR: In this paper , a novel ratiometric signal processing (RSP) scheme at the receiver node is proposed to improve the link performance of the UWOC system in terms of signal-to-noise ratio (SNR).
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Optical Wireless Communications: System and Channel Modelling with MATLAB®
TL;DR: The authors highlight past and current research activities to illustrate optical sources, transmitters, detectors, receivers, and other devices used in optical wireless communications and describe techniques for using theoretical analysis and simulation to mitigate channel impact on system performance.
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Underwater Optical Wireless Communication
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TL;DR: An exhaustive overview of recent advances in underwater optical wireless communication is provided and a hybrid approach to an acousto-optic communication system is presented that complements the existing acoustic system, resulting in high data rates, low latency, and an energy-efficient system.
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A Survey of Underwater Optical Wireless Communications
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