Coverage and Distance Optimization for Interference-Aware NR-FSS Coexistence

Abstract

The increasing demand for new radio (NR) deployment in the C-band has raised significant concerns about co-channel interference with incumbent fixed satellite services (FSS). This paper investigates an interference-aware coexistence strategy leveraging NR flexibility such that the signal-to-interference-and-noise ratio (SINR) at the earth station (ES) remains above a predefined threshold. Considering full use of the available NR BS subcarriers, the minimum distance from the NR base stations (BSs) to the FSS ES is optimized to maximize the NR and FSS performance and optimize the coverage radius of the NR BS. The resulting optimization problem is solved through an iterative search-based approach, considering the performance of both NR and FSS networks. Simulation results show the efficacy of leveraging NR flexibility. This study provides actionable design guidelines for spectrum regulators and network planners to enable harmonious coexistence of terrestrial and satellite systems.