Underwater wireless information transfer is of great interest to the military, industry, and the
scientific community, as it plays an important role in tactical surveillance, pollution …

Even though most of the Earth's area is sheltered by the hydrosphere, the underwater world
is nonetheless a challenging puzzle that has drawn the attention of scientists and …

Covers the latest developments in PNT technologies, including integrated satellite
navigation, sensor systems, and civil applications Featuring sixty-four chapters that are …

Speeding up the transmission of information carried by waves is of fundamental interest for
wave physics, with pivotal significance for underwater communications. To overcome the …

As a paradigm to recover the sparse signal from a small set of linear measurements,
compressed sensing (CS) has stimulated a great deal of interest in recent years. In order to …

Underwater acoustic channel models provide a tool for predicting the performance of
communication systems before deployment, and are thus essential for system design. In this …

In the 6G era, Space-Air-Ground Integrated Network (SAGIN) are anticipated to deliver
global coverage, necessitating support for a diverse array of emerging applications in high …

Acoustic propagation is characterized by three major factors: attenuation that increases with
signal frequency, time-varying multipath propagation, and low speed of sound (1500 m/s) …

High-rate data communication over a multipath wireless channel often requires that the
channel response be known at the receiver. Training-based methods, which probe the …

In this paper, we investigate various channel estimators that exploit channel sparsity in the
time and/or Doppler domain for a multicarrier underwater acoustic system. We use a path …