Underwater acoustic (UWA) communications have been widely used but greatly impaired due to the complicated nature of underwater environment. In order improve UWA communications, modeling and understanding channel is indispensable. However, there exist many challenges high uncertainties environment lack real-world measurement data. this work, capability reservoir computing deep learning has expl...

We present an underwater localization system for medium-sized Autonomous Underwater Vehicles (AUVs) that leverages a broadband wireless acoustic communication GPS-denied localization. Many current systems assume single line-of-sight path and use either narrow-band signals or short-duration pings the convenience of mitigating motion-induced Doppler at expense time-of-arrival (TOA) accuracy opera...

The nature of the multipath channel and peak-to-average power ratio (PAPR) are regarded as main challenges restricting design a multicarrier reliable underwater acoustic (UWA) communication. This paper proposes new scheme, precoded index modulation orthogonal frequency division spread spectrum (IM-OFDM-SS), for UWA IM-OFDM-SS is proposed to increase transmission efficiency exploit spreading div...

Due to the limitation of communication range sensor nodes, underwater nodes must transmit data water surface through routing mechanism. Therefore, design algorithm is related performance network, and research necessary. However, are vulnerable ocean turbulence biological factors. The environment dynamic complex, which greatly affects acoustic channel, making improvement protocol a challenge. Th...

Underwater environments create a challenging channel for communications. In this paper, we design novel receiver system by exploring the machine learning technique–Deep Belief Network (DBN) – to combat signal distortion caused Doppler effect and multi-path propagation. We evaluate performance of proposed in both simulation experiments sea trials. Our comprises DBN based de-noising classificatio...

Many potential applications such as ocean sampling network, environment monitoring, undersea exploration, disaster prevention, assisted navigation, and mine reconnaissance can be provided by deploying the Underwater Acoustic Sensor Networks. Because of the peculiarities of acoustic communication in underwater, the MAC protocol which play a role of managing and controlling the channels, must ove...

In this paper, we proposed a novel receiver algorithm for coherent underwater acoustic communications. The proposed receiver is composed of three parts: (1) Doppler tracking and correction, (2) Time reversal channel estimation and combining, and (3) Joint iterative equalization and decoding (JIED). To reduce computational complexity and optimize the equalization algorithm, Time reversal (TR) ch...

The aim of this paper is to highlight the prospects and problems of optical wireless communication for applications in the field of Underwater Wireless Sensor Networks (UWSNs).This paper reviews the physical fundamentals and engineering implementations for efficient information exchange via wireless communication using physical waves as the carrier among nodes in an underwater sensor network. H...

In setting up an underwater acoustic network the first and foremost task is node deployment. In underwater acoustic sensor networks, localization is one of the most important technologies to increase the coverage area and also to reduce the energy consumption of the node. Localization plays a critical role in many applications. This paper aims at analysing the node deployment strategies on loca...