Analysis of the Impact of Radio Frequency Interference from Satellite on Terrestrial Network in Adjacent Channel

The rapid expansion of cellular frequency bands has reduced terrestrial network coverage, particularly in areas with low population density or difficult access. Non-Terrestrial Networks (NTNs), which utilize satellites and high-altitude platforms, have emerged as a complementary solution to address these coverage challenges. However, NTNs operating in adjacent frequency bands to terrestrial networks introduce the risk of radio frequency interference. This paper focuses on the interference impact of NTN satellites operating in the NR-NTN band n256 on terrestrial network user equipment (UE) in the adjacent n1 band, under a Downlink (DL) scenario. Interference protection criteria were based on a 5% throughput loss, evaluated using Signal-to-Interference-plus-Noise Ratio (SINR). Simulation results, conducted using SEAMCAT, indicate an average throughput loss of 2.736%, satisfying the interference protection criteria.