From the seafloor to the sea surface: A technical solution for the cabled EMSO-SN1 observatory in the Western Ionian Sea

Sparnocchia, Stefania; Borghini, Mireno; Durante, Sara; Meccia, Virna; Giordano, Alessandro M.; Biasini, Gianni

doi:10.1109/oceans-genova.2015.7271527

Cited by 4 publications

(2 citation statements)

References 21 publications

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“…the CNR-ISMAR (Sparnocchia et al 2015), would allow the collection of near real-time data from the entire water column, improving the present state of ocean observation and resulting in more reliable forecasts of its future conditions.…”

Section: Discussionmentioning

confidence: 99%

Trials of an autonomous profiling buoy system

Aracri

Borghini

Canesso

et al. 2016

Journal of Operational Oceanography

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In June 2013 the Institute of Marine Sciences of the National Research Council of Italy (CNR-ISMAR) started the test phase of one of the few Mediterranean autonomous profiling systems, produced by NiGK Corporation, installed in a mooring configuration, transmitting daily hydrological vertical profiles in real time through satellite communication. The selected site is the Corsica Channel, a narrow passage between the Corsica and Capraia islands connecting the two main regions of the western Mediterranean: the Tyrrhenian and the Liguro-Provençal basins. During the test phase of this new instrument a continuous monitoring of the upper 181 m of the water column was performed, with more than 90% of successful satellite transmissions. The high-quality data received have been processed and analysed. The data collected confirmed our previous hydrological knowledge of the Corsica Channel, allowing us to observe in real time the variable and significant behaviour of the channel.

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Section: Discussionmentioning

confidence: 99%

Trials of an autonomous profiling buoy system

Aracri

Borghini

Canesso

et al. 2016

Journal of Operational Oceanography

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“…The seafloor observation network (SON), as a real-time ocean observation platform, plays an essential role in the collection of ocean information, tsunami warning, positioning and navigation of vehicles, etc. So far, cabled SONs have been widely deployed, such as the Hawaii-2 Observatory (H2O) [1], the VENUS system deployed in Canada [2], the US NSF Regional Scale Nodes, and the NEMO-SN1 installed in Southern Italy [3]. The cables ensuring a high communication rate and sufficient power supply are expensive and inflexible though [4].…”

Section: Introductionmentioning

confidence: 99%

Efficient On-Off Keying Underwater Acoustic Communication for Seafloor Observation Networks

Yao

Zhu

et al. 2020

Applied Sciences

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In the cableless seafloor observation networks (SONs), the links among network nodes rely on underwater acoustic communication (UAC). Due to the energy constraint and the high-reliability requirement of the cableless SONs, the noncoherent UAC has been a preferred choice, even though a noncoherent UAC scheme generally suffers from low spectral efficiency. In this paper, we propose a high-spectral-efficiency noncoherent UAC transmission scheme which is implemented as an orthogonal frequency-division multiplexing (OFDM) system adopting the on-off keying (OOK) modulation. To simultaneously achieve high performance at a low energy consumption, an irregular recursive convolutional code (IrCC) is employed and an accumulator (ACC) is introduced to achieve a modulation with memory at the transmitter side. The ACC enables a turbo iteration between the soft demapper called the ACC-OOK demapper and the soft decoder on the receiver side, and also reduces the decoding error floor. To account for the unknown signal-to-noise ratio (SNR), an iterative threshold estimation (ITE) algorithm is proposed to determine a proper decision threshold for the ACC-OOK demapper. The IrCC is designed to match the extrinsic information transfer (EXIT) curve of the ACC-OOK demapper, lowering the SNR threshold of the aforementioned turbo iteration. Simulations and experimental results verify the superiority of the proposed noncoherent UAC scheme over conventional ones.

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