The co-existence of terrestrial and non-terrestrial networks (NTNs) is essential for achieving global coverage in sixth-generation cellular networks. Due to increasing spectrum demand, there is discussion in the world level to share some frequencies used in terrestrial Networks (TNs) with NTNs, resulting in co-channel interference and performance degradation. This paper analyzes the interference caused by satellite networks on TN in the S-band. We examined the transmission mechanisms of satellite signals and conducted simulations to evaluate interference intensity across varying slant ranges. Our findings indicate that the angle between the user equipment direction and the sub-satellite point direction from the beam center significantly impacts the interference level.

翻译：地面网络与非地面网络（NTN）的共存对于实现第六代蜂窝网络的全球覆盖至关重要。由于频谱需求日益增长，国际层面正在探讨将部分地面网络（TN）使用的频段与NTN共享，这将导致同频干扰和性能下降。本文分析了S波段卫星网络对地面网络造成的干扰。我们研究了卫星信号的传输机制，并通过仿真评估了不同斜距下的干扰强度。研究结果表明，用户设备方向与波束中心至星下点方向之间的夹角对干扰水平具有显著影响。