Mohamed Ahmed M. Khalifa¹, Hebat-Allah M. Mourad¹ and Mahmoud Abdelaziz², ¹Cairo University, Egypt, ²University of Science and Technology in Zewail City, Egypt

Increasing global data traffic made 5G (IMT-2020) a good solution, especially in the mid-band spectrum (the 3.5 GHz range), because it balances coverage and capacity. Thus, some countries have identified it as one of the candidate bands for 5G. C-band (from 3400 to 4200 MHz) is a mainstay of satellite communications and provides broadband connectivity in remote areas today. This paper discusses the feasibility of 5G (IMT-2020) and Fixed Satellite Service (FSS) system to coexist in the C-band range by analyzing the impact of the interference from 5G (IMT2020) base stations towards the FSS earth station. This analysis is based on the most recent unwanted emissions limits used from 3GPP TS 38.104. The results show that in the adjacent channel scenario and by employing an elevation angle of 48⁰ and a guard band from 41-100 MHz, 5G (IMT-2020) base station needs to be separated by at least 0.295 Km away from the FSS earth station. The protection distance increases by 26.35 Km when decreasing the guard band to 30 MHz. Thus, a new unwanted emission limit is proposed to reduce the protection distance in the 30 MHz guard band scenario.

FSS, interference, 5G, C-band, IMT-2020 and satellite communication.