The advancement of acoustic modem technology in providing better data rates and more reliable underwater wireless communications has motivated many researchers to create various algorithms to support such technology in a better way. These continuing researches have greatly improved the underwater communication performance in the last two decades. However issues such as inefficient horizontal co...

This work presents an underwater acoustic communication mechanism which has not been much explored yet. The main goal of this paper is to present academic studies in this subject and try to implement communication systems that can be used to attend modern market needs. In the beginning of this work an introduction about underwater communication is done, as well as the presentation of the equipm...

The long term goals of this project are: i) to predict and understand the characteristics of active and passive time reversing array (TRA) performance in shallow ocean waters, ii) to deduce the effectiveness of using a TRA for underwater communication and for surveillance of the acoustic characteristics of known or unknown environments, and iii) to determine how to exploit the generic propagati...

Underwater sensor nodes will find applications in oceanographic data collection, pollution monitoring, offshore exploration, disaster prevention, assisted navigation and tactical surveillance applications. Moreover, unmanned or autonomous underwater vehicles (UUVs, AUVs), equipped with sensors, will enable the exploration of natural undersea resources and gathering of scientific data in collabo...

In the light of the characteristics of random change that underwater sensor change by time, space and frequency, select the best relay node to improve communication quality and get the diversity gain. A new optimal relay selection method is proposed in this paper, by considering two indexes synthetically that channel gain and underwater acoustic communication long time delay to select the best ...