Performance of modulating retro-reflector-assisted ground-HAP-satellite uplink laser communication system

Abstract

Satellite-ground laser communication has attracted wide attention due to its advantages of rich spectrum resources, fast communication speed, strong anti-interference ability, and high security. Therefore, this paper proposes to use a modulating retro-reflector (MRR) and assemble it on the HAP to improve the performance of the ground-satellite uplink laser communication system. Since the influence of the hovering fluctuation of the HAP on the system cannot be ignored, this paper introduces the angle of arrival jitter to represent the influence of the random jitter of the HAP in the air on the channel and considers the light intensity scintillation, beam wander, atmospheric attenuation, pointing error. The combined effect of the system is analyzed. At the same time, the influence of key factors such as beam width, zenith angle, HAP position distance, wind speed, and cloud visibility on the performance of the ground-HAP-satellite system under different MRR effective areas is simulated and analyzed and compared with the ground-HAP-satellite system without MRR. The results show that the MRR-assisted ground-HAP-satellite system has better communication performance. The work of this paper provides a good theoretical basis for the engineering implementation of the MRR-assisted ground-HAP-satellite laser communication system.