Design and Verification of High-Speed Data Transmission System for the Elliptical Orbit Satellite

With the improvement of satellite sensor resolution, the data transmission rate also gradually increases. The data transmission system has adopted the high-frequency band to carry a higher data rate, and it needs to support high-order modulation modes such as 8PSK (8 Phase Shift Keying), 16APSK (16 Amplitude Phase Shift Keying), and an effective coding method with LDPC (Low Density Parity Check Code). The data transmission system in the satellite on the circular orbit is composed of baseband equipment, a power amplifier, and an antenna. The farthest distance of satellite to ground is considered under the low elevation of the ground station. The link allowance ensures that the whole arc meets the requirements. The link boundary conditions of the satellite on the circle orbit cannot be fully applicable on the elliptical orbit, which needs to adjust the system design method based on the data transmission system. We proposed a communication system on the elliptic orbit, in which the antenna’s widest beam angle is the coverage angle to the ground in the orbit perigee, and the EIRP (Effective Isotropic Radiated Power) in the orbit apogee is the maximum value. The simulation has ensured that a high-speed data transmission system can meet the elliptical orbit satellite data transmission in any access arc.