A High Altitude Platform Station (HAPS) is a network node that operates in the stratosphere
at an of altitude around 20 km and is instrumental for providing communication services …

In recent years, free space optical (FSO) communication has gained significant importance
owing to its unique features: large bandwidth, license free spectrum, high data rate, easy …

Due to the unprecedented advances in satellite fabrication and deployment, innovative
communications and networking technologies, ambitious space projects and programs, and …

This paper contains a review of technologies, theoretical studies, and experimental field
trials for optical communications from and to high-altitude platforms (HAPs). We discuss the …

Nonterrestrial networks have been attracting much interest from the industry and academia.
Satellites and high-altitude platform station (HAPS) systems are expected to be the key …

Space-air-ground integrated vehicular networks (SAGIVN) have been widely envisioned as
a promising network architecture for sixth-generation to support the Internet of Vehicles …

In this paper, we study two adaptive beam control techniques, where the beam divergence
angle is adjusted at the transmitter to (i) maximize link availability or (ii) minimize transmitter …

In this article, we study the performance of multiple-hop mixed radio frequency (RF)/free-
space optical (FSO) communication-based decode-and-forward protocol for multicast …

An overview of CAPANINA, a project funded by the European Commission's 6th Framework
Programme, is presented. The project is developing communications technologies for use …

Earth-observation (EO) satellite missions using high-resolution optical or radar sensors are
producing an immense amount of data which needs to be send down to earth. The fraction …