Energy efficiency (EE) is an important aspect of satellite communications. Different with the existing algorithms that typically use first-order Taylor lower bound approximation to convert non-convex EE maximization (EEM) problems into convex ones, in this letter a two-step quadratic transformation method presented. In first step, fractional form achievable rate over total power consumption con...

This paper considers a dual-hop cooperative satellite-unmanned aerial vehicle (UAV) communication system including satellite (S) and group of cluster headers (CHs) which are respectively with uniformly distributed UAVs. Specifically, the CHs serve as decode-and-forward relays to forward information transmitted by S Moreover, free-space optical (FSO) radio frequency (RF) technologies adopted ove...

Satellite-aerial communication (SAC) is envisioned as a fundamental component of the sixth-generation (6G) wireless networks. Motivated by its importance, we investigate SAC system including geostationary satellite (S), target aircraft (TA), and set interfering (IA). Specifically, TA sends signals to S in presence IA interference. Considering trajectory, hierarchy, safety distance aircraft’s fl...