Underwater Acoustic Modem for a MOrphing Distributed Autonomous Underwater Vehicle (MODA)

Coccolo, Emanuele; Campagnaro, Filippo; Tronchin, Davide; Montanari, Antonio; Francescon, Roberto; Vangelista, Lorenzo; Zorzi, Michele

doi:10.1109/oceanschennai45887.2022.9775308

Cited by 13 publications

(4 citation statements)

References 6 publications

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“…As compared to the same energy levels, the dMUT improves the SNR by three times and the peak reachable contact range at 3 dB above the noise floor. Additionally, Coccolo et al, [82] morphing distributed autonomous (MODA) system is a one-of-a-kind platform that incorporates shape-changing characteristics to improve vehicle performance and flexibility to various missions. This system's underwater acoustic modem must be dependable, robust, and capable of operating in a variety of water conditions.…”

Section: Development Of Aptmentioning

confidence: 99%

A Comparative Review on Acoustic and Inductive Power Transfer

Muhammad Izzul Syafiq Faiz,

Md Rabiul Awal,

Md Rubel Basar

et al. 2024

ARASET

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Wireless Power Transmission (WPT) has emerged as a prominent player in numerous industries recently. It is already established in wireless charging for electric cars and electronic gadgets. However, it has promising applications in medical implants and imaging as well. Among several proposals, Inductive Power Transfer (IPT) and Acoustic Power Transfer (APT) have shown a major impact on this area of interest. This paper presents a comparison between IPT and APT for wireless power transmission (WPT). Most recent proposals are reported, and several key parameters are considered to evaluate the proposals. That includes operating frequencies, separations gaps, powers and power transmission efficiencies and experimental validity. It is found from the review that; a maximum 818 kW of power is transmitted using IPT for electric vehicles. However, APT can transmit 1.068 kW and 5.4 W through wall and in-body medium (implants). Over 90% efficiencies are found for both APT and IPT. In fact, power transfer with 95.66% efficiency over a 6 cm distance of 23.4 W is achieved for APT and 95.6% with 20 cm separation gaps is achieved for IPT for 20 kW power. A wide range of frequencies are applied for both APT and IPT. However, lower frequencies are mostly suitable for high power, more specifically less than MHz ranges. Naturally, lower frequencies are preferable for low power high efficiencies.

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Section: Development Of Aptmentioning

confidence: 99%

A Comparative Review on Acoustic and Inductive Power Transfer

Muhammad Izzul Syafiq Faiz,

Md Rabiul Awal,

Md Rubel Basar

et al. 2024

ARASET

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“…During the last years, chirp spread spectrum (CSS) was already used in acoustic underwater communication, e. g., for synchronization [41], [42], [47]- [49], data modulation [13], [50], [51] or sweeped carrier frequency [52], [53]. However, FSCM was actually rarely used for acoustic underwater communication.…”

Section: Acoustic Underwater Communicationmentioning

confidence: 99%

“…Opposed to that, typical acoustic underwater receivers, e. g., [20], [21], [49], [50], sample the signal in the PB with sampling frequency f s,PB , after the received signal from the hydrophone passed a LNA and BPF. This receiver structure 0 1 2 3 4 5 6 7 8 9 10.…”

Section: Receiver Structuresmentioning

confidence: 99%

Doppler Shift and SFO Robust Synchronization for LoRa-Like Acoustic Underwater Communication

Steinmetz,

Renner

2023

IEEE Access

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Frequency shift chirp modulation (FSCM) is the modulation technique utilized by the LoRa physical layer, a widely used and relatively new communication technique for radio low-power wide area networks (LPWANs). In this paper, we adapt and implement FSCM for low-power acoustic underwater communication. Opposed to over-water communication based on the electromagnetic wave, the acoustic wave in water travels much slower. Therefore, acoustic underwater communication is more sensitive to motion-based Doppler shifts. For a resilient acoustic underwater communication Doppler tracking and removal is mandatory. In this paper, we mathematically derive the effect of Doppler shifts to FSCM symbols. Afterwards, we describe a novel algorithm for a low-power receiver to track Doppler shifts without modification of the transmitted packet. Finally, we evaluate and compare our algorithm to another Doppler estimation algorithm from literature and study the effect on the bit error rate (BER). We show, that our algorithm can improve with lightweight additional computational overhead the BER by a factor of more than 10 4 in some cases.

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“…Their use in Internet of Things (IoT) applications, such as monitoring of aquaculture and bathing sites, is not practical due to the high cost and power consumption of most of the commercial acoustic modems, that are usually designed to achieve long range transmissions [1]-[3] rather then being used in small low-power nodes. In contrast to these legacy applications, in the last ten years both researchers [4]- [7] and modem manufactures [8], [9] have started developing low-cost low-power acoustic modems, in order to fill this technological gap that so far made the use of acoustic modems impractical in dense sensor network deployments. Moreover, the use of long range high power radio antennas to send the data collected by surface nodes to shore should be avoided to minimize the power consumption and extend the battery duration of the nodes.…”

Section: Cloud Server (Internet)mentioning

confidence: 99%

A Network Infrastructure for Monitoring Coastal Environments and Study Climate Changes in Marine Systems

Campagnaro

Toffolo

Pozzebon

et al. 2022

OCEANS 2022, Hampton Roads

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Climate changes have a tremendous impact on coastal and littoral areas, strongly affected by seaquakes and floods. Moreover, global warming causes a drastic change on the biodiversity of rivers, seas, lakes, including in biodiversity hotspots and protected areas, such as the Venice Lagoon in Italy. A similar impact is caused by pollutants: this called for a largescale long-term action that aims to monitor aquatic environmental parameters in order to predict, manage and mitigate these effects. Yet, coastal systems are highly heterogeneous in space and variable over short (daily), medium and long (seasonal, interannual) timescales, making reliable but affordable monitoring a challenging task. This paper proposes to automate this process with the use of a low-power sustainable integrated underwater and above water Internet of Things sensor network, able to collect water measurements in a cloud database and make them available to researchers to monitor the status of a certain area and develop their predictions models. Simulation results highlight how Low-Power Wide-Area Networks can support the data collection from a dense sensor deployment.

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Underwater Acoustic Modem for a MOrphing Distributed Autonomous Underwater Vehicle (MODA)

Cited by 13 publications

References 6 publications

A Comparative Review on Acoustic and Inductive Power Transfer

A Comparative Review on Acoustic and Inductive Power Transfer

Doppler Shift and SFO Robust Synchronization for LoRa-Like Acoustic Underwater Communication

A Network Infrastructure for Monitoring Coastal Environments and Study Climate Changes in Marine Systems

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