Modeling Underwater Acoustic Channels in Short-range Shallow Water Environments

Kulhandjian, Hovannes; Melodia, Tommaso

doi:10.1145/2671490.2674560

Cited by 33 publications

(17 citation statements)

References 15 publications

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“…The hydrodynamics are influenced by the bathymetry profile. The average of water depth ranged from 0-30 meters (Shallow water) (Kulhandjian & Melodia, 2014). Bottom friction has a big role resisting the surface current flow.…”

Section: Tidal Current Simulationmentioning

confidence: 99%

Modeling Tidal Current on Banten Bay During Transitional Monsoons

Bayhaqi

Wisha

Surinati

2018

segara

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Hydrodynamical condition of Java sea as a part of Indian-Pacific throughflow system which is influenced by monsoon will affect the condition of Banten bay such tidal current. Bordered by Java sea makes Banten bay preoccupied with fisheries and shipping activities, so the information of current pattern e.g. tidal current is very necessary. This study aims to simulate the tidal current pattern using flow model fm as a numerical approach. Two-dimensional hydrodynamic model was employed to perform the simulation of tidal current. Model was validated by using current and tidal observation data which was taken on September 2015 and April 2016. The result shows that the current moved southwestern toward the land during high neap and high spring tidal conditions which ranged 0 – 0.142 m/s at the first transitional monsoon and 0-0.153 m/s at second transitional monsoon. During low spring tidal condition for both transitional monsoon, the current flowed northwestward on west side and northeastward on east side within the bay which ranged 0 – 0.137 m/s and 0 – 0.127 m/s respectively. The hydrodynamic conditions of Banten Bay are severe different between 2 transitional seasons, especially for the current speed and direction. It induces a different transport mechanism, resulting the unstable accretion and abrasion along Banten Bay coast.

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Section: Tidal Current Simulationmentioning

confidence: 99%

Modeling Tidal Current on Banten Bay During Transitional Monsoons

Bayhaqi

Wisha

Surinati

2018

segara

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“…In deep water, the multi path phenomenon occurs due to ray bending, i.e., the tendency of acoustic waves to travel along the axis of lowest sound speed. Even though, there is no general consensus on an appropriate statistical model for received signal amplitude in underwater acoustic channels, the small-scale fading effects are often modeled as Rayleigh or Rician fading [41][42][43] while some studies suggest K-distribution [44] or Weibull distribution [45]. In [46], Urick proposes Rician model to describe the amplitude fluctuations in ocean environment.…”

Section: Calculation Of the Minimum Transmit Powermentioning

confidence: 99%

A Hybrid ARQ scheme combining erasure codes and selective retransmissions for reliable data transfer in underwater acoustic sensor networks

Geethu

Babu

2017

J Wireless Com Network

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In this paper, we investigate a hybrid automatic repeat request (ARQ) scheme for reliable data transfer in multi-hop underwater acoustic sensor networks (UASNs). The proposed scheme combines Reed-Solomon-based packet level erasure coding and selective retransmissions to achieve high reliability and energy efficiency. We also describe how to select the code rate (i.e., number of encoded packets) for a given message block consisting of m packets. The paper evaluates the performance of the proposed scheme by taking into account the underwater-specific characteristics such as distance dependent bandwidth, acoustic spreading effects, propagation loss, and fading effects. Simulation results demonstrate that the proposed scheme can significantly improve the network throughput and energy efficiency while reducing the end to end delay considerably.

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“…Note that the suffixes, BC and MC, are used to signify the basic CLEAN and modified CLEAN algorithms. Another such measure is the Kullback-Leibler (K-L) divergence [46]…”

Section: Comparisonmentioning

confidence: 99%

Serial subtractive deconvolution algorithms for time‐domain ultra wide band in‐vehicle channel sounding

Chandra¹,

Blumenstein²,

Mikulasek³

et al. 2015

IET Intelligent Transport Systems

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Ultra wide band (UWB) communication is expected to play a key role in next generation broadband intra vehicle wireless applications. The car compartment differs significantly from other well studied indoor or outdoor environments. Hence, channel sounding experiments are crucial for gaining a thorough knowledge of the UWB signal propagation characteristics in such a medium. Time domain channel sounding campaigns often employ some sort of deconvolution during measurement post processing as the measured signal in these experiments is the convolution of the channel response and the probing pulse which violates the Nyquist criterion. In this paper, a comparison of two variants of time-domain serial subtractive deconvolution algorithm, popularly known as CLEAN, is presented. Appropriate statistical metrics for assessing the relative merit of a deconvolution technique are identified in the context of intra vehicle UWB transmission, and the better algorithm is selected based on its performance over a standard IEEE channel simulation testbed. The chosen method is then applied to extract power delay profile and delay parameters from an empirical time domain sounding experiment performed inside a passenger car. The effects of passenger occupancy, transmitter receiver separation, and absence of direct transmission path are studied.

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Modeling Underwater Acoustic Channels in Short-range Shallow Water Environments

Cited by 33 publications

References 15 publications

Modeling Tidal Current on Banten Bay During Transitional Monsoons

Modeling Tidal Current on Banten Bay During Transitional Monsoons

A Hybrid ARQ scheme combining erasure codes and selective retransmissions for reliable data transfer in underwater acoustic sensor networks

Serial subtractive deconvolution algorithms for time‐domain ultra wide band in‐vehicle channel sounding

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