Scheme Design for High-Throughput Terahertz feeder link in Non-Terrestrial-Networks

In the non-terrestrial network (NTN) being considered for Beyond 5G (B5G), high -altitude platform systems (HAPS) and low earth orbit (LEO) satellites will be used as communication platforms. This paper proposes a feeder link in HAPS and LEO using the THz band from the viewpoint of high speed and high capacity. the THz band feeder link has the feature of ensuring link performance even in cloudy or light rain compared to free space optical (FSO). In this paper, the link budget is clarified by estimating the propagation loss under various weather conditions based on the ITU-R model and other models. Based on the results, throughput evaluation results for each modulation scheme are presented.