Terrestrial communication networks mainly focus on users in urban areas but have poor
coverage performance in harsh environments, such as mountains, deserts, and oceans …

This paper investigates the secure communication of a cognitive satellite terrestrial network
with software-defined architecture, where a gateway is acting as a control center to offer the …

The lack of available unlicensed spectrum together with the increasing spectrum demand by
multimedia applications has resulted in a spectrum scarcity problem, which affects satellite …

This paper investigates the performance limits of cognitive-uplink fixed satellite service
(FSS) and terrestrial fixed service (FS) operating in the range 27.5-29.5 GHz for Ka-band. In …

In recent years, low earth orbit (LEO) satellite constellation systems have been developed
rapidly. However, the scarcity of satellite spectrum resources has become one of the major …

With the ever increasing spectrum demand of broadband multimedia services, cognitive
satellite terrestrial networks have emerged as a promising paradigm for future space …

With the ubiquitous deployment of Internet-of-Things (IoT) devices and applications, satellite-
aerial-terrestrial integrated network (SATIN) is regarded as a promising candidate to …

Cognitive radio technologies have achieved in the recent years an increasing interest for the
possible gain in terms of spectrum usage with respect to unshared approaches. While most …

With the rapidly increasing spectrum demand by multimedia applications, the limitation of
the spectrum resource restricts the improvement of the performance for communication …

In this letter, we consider a cognitive radio network consisting of broadcast satellite service
(BSS), high-density fixed-satellite service (HDFSS), and high-altitude platforms (HAPs) …