Power Adaptation for Suborbital Downlink with Stochastic Satellites Interference

Abstract

This paper investigates downlink power adaptation for the suborbital node in suborbital-ground communication systems, which are subject to extremely high reliability and ultra-low latency communications requirements. The problem is formulated as a power threshold-minimization problem, where interference from satellites is modeled as an accumulation of stochastic point processes on different orbit planes, and hybrid beamforming (HBF) is considered. To ensure Quality of Service (QoS) constraints, the finite blocklength regime is adopted. Numerical results show that the required transmit power of the suborbital node decreases as the elevation angle at the receiving station increases.