The relationship between satellite and mobile networks: comparative analysis of data transfer rate and bandwidth

Abstract

This article discusses a methodology for calculating the basic parameters of an information transmission system from a spacecraft to a network of ground stations. The study analyzed the features of the development of mobile and satellite communication systems, their complementarity and technical characteristics. In order to ensure the efficiency of the information transmission system, the necessary calculations were carried out considering the frequency range of the system, the type of modulation, losses in the antenna-feeder system and atmospheric influences. The 7-8 GHz range was chosen as the frequency range used, and the actual operating range was determined in the range of 7.25-7.30 GHz. Differential quadrature-phase modulation (π/4-DQPSK) with a π/4 radial phase shift was used as the modulation method. According to the calculation results, the width of the required frequency band was 5 MHz, while considering the total losses and atmospheric attenuation in the antenna-feeder system. The results of the conducted research can serve as a methodological basis for designing and optimizing mobile and satellite communication systems.