SCRS Proceedings of International Conference of Undergraduate Students
Contribution to the analysis of coexistence between 5G operating at 10.5 GHz and DTH satellite system operating in Ku band
Authors: Felipe Batista Faro Pinto, Luciano Camilo Alexandre and Arismar Cerqueira Sodré Junior
Publishing Date: 09-01-2023
ISBN: 978-81-95502-01-1
Abstract
This work presents an analysis of the coexistence between an FSS (ES) (Fixed Satellite Service - Earth Station) DTH (Direct-to-home) system and a signal operating at 10 GHz band, a possible band to be identified for the fifth generation of mobile systems (5G) in International Telecommunication Union (ITU) Region 2. The main contribution of the research was to analyze whether the TV signal received by FSS (ES) can be affected by the adjacent channel operation of 5G base stations operating at 10.5 GHz. Therefore, for this assessment, a CW (Continuous wave) carrier at 10.5 GHz was used and radiated by a log-periodic antenna. The FSS (ES) antenna was pointed towards Star One C2 satellite, located at 70 W orbital position, to be able to obtain TV channels. Moreover, to measure the power level of the signal received by the LNBF, a horn antenna was coupled above the LNBF, and, using the spectrum analyzer, we analyzed the interference level. As a result, a power threshold of -64 dBm, was obtained for the 5G interferer signal that blocks the TV channels received the Ku-band FSS system with the LNBF model used. Furthermore, the LNBF starts operating in a saturated region, so non-linear effects such as distortion and intermodulation start to appear. Therefore, from the experiment carried out, the results considering the proposed scenario and the LNBF model show that a 5G signal operating in an adjacent band to the DTH satellite system can cause interference depending on the 5G power level that reaches the LNBF. As future work, it is intended to evaluate other LNBF models and also a possible protection distance between the systems.
Keywords
5G, 6G, Coexistence spectrum sharing, Ku-band, satellite communications.
Cite as
Felipe Batista Faro Pinto, Luciano Camilo Alexandre and Arismar Cerqueira Sodré Junior, "Contribution to the analysis of coexistence between 5G operating at 10.5 GHz and DTH satellite system operating in Ku band", In: Prashant Singh Rana, Deepak Bhatia and Himanshu Arora (eds), SCRS Proceedings of International Conference of Undergraduate Students, SCRS, India, 2023, pp. 27-31. https://doi.org/10.52458/978-81-95502-01-1-4