An Analytical Model for Coordinated Multi-Satellite Joint Transmission System

Satellite communication is one of the key technolo-gies that is enabling next-generation networks. However, the nearest-satellite-supported downlink transmission may not meet a user terminal (UT)'s requirements due to limited signal strength, especially in emergent scenarios. In this paper, we investigate a coordinated multi-satellite (CoM $S$) joint transmission system from a system-level perspective, where a UT can be served by multiple satellites to improve its quality-of-service (QoS). Furthermore, we analyze the coverage and rate of a typical UT in this joint transmission system. Simulations and numerical results show that the introduced system achieves a higher coverage probability than that of the traditional nearest-satellite-supported network. Moreover, a UT's ergodic rate can be maximized by selecting an appropriate elevation angle.