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Along with the development of ocean technology, the development of ocean detection, monitoring and exploitation has been made. Ocean observation network is a mature, all-weather fixed observation platform, which can achieve real-time and long term monitoring of its observation range. With the forming of mobile observation network, the underwater helicopter as an important part of mobile observation...
Underwater absorption, scattering and turbulence processes will introduce attenuation and fading to light propagation and then degrade the performance of underwater wireless optical communications (UWOC). In this paper, we consider UWOC multiple-input single-output (MISO) links over which a single detector is illuminated by a uniform circular array (UCA) of an arbitrary number of light sources. We...
In practical underwater wireless optical communications (UWOC), pulse modulation technique has been widely used due to the high optical power efficiency and relatively low system complexity. Compared with the simplest on-off keying (OOK) scheme, digital pulse interval modulation (DPIM) improves both power efficiency and error performance and requires no symbol synchronization. Polarization shift keying...
In underwater wireless optical communications (UWOC), impulse response is essential for performance evaluation and system design. However, most prior works on impulse response modeling for UWOC links utilize curve fitting of Monte Carlo simulation results and require remodeling once the link geometry or system configuration is changed. In this paper, we derive an analytical formula to model the single...
With recent advances and interests in underwater wireless optical communications (UWOC), a proper understanding of optical propagation in underwater environment is more essential. In this paper, we study the channel model taking absorption, scattering and turbulence into account. Then we consider average (ergodic) channel capacity of UWOC links under weak turbulence. The fading coefficient of weak...
The use of high efficiency resonant coupling wireless power systems for subsea operations is here considered for the charging of autonomous underwater vehicles. In this paper, two architectures based on two different inductors are analysed for their potential as resonant wireless power couplers. Both systems were designed and optimised through electromagnetic 3D simulations, upon which two prototypes...
The ocean and the Blue Economy are increasingly top priorities worldwide. The immense ocean territory in the planet and its huge associated economical potential is envisioned to increase the activity at the ocean in the forthcoming years. The support of these activities, and the convergence to the Internet of Things paradigm, will demand wireless and mobile communications to connect humans and systems...
In this work we describe our investigation into wideband channel models for the acoustic water pipe channel operating over the 10–50KHz frequency band. We provide experimental results for a straightforward water pipe system consisting of a single pipe of length 6.3m, diameter 7.1cm, constructed from PVC and terminated with water tanks at each end in a hydrostatic configuration. It is observed that...
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