ソフトウェア無線による衛星通信シミュレータの開発、及び妥当性の検証

抄録

In satellite-to-ground station communication, factors such as atmospheric effects, Doppler shifts, and interference from other signal sources make it challenging to evaluate the practicality of satellite transmission power and modulation schemes through ground testing alone. In this study, we replicated these challenging communication impairments using a simulator developed with GNU Radio and software-defined radios. We measured and compared the signal levels from the simulator and the actual signals from the satellite, demonstrating the validity of the simulated elements.

Furthermore, the simulator aims to support parameter selection for LoRa modulation to be used in the "Ten-Koh 3" microsatellite currently under development by the Okuyama Laboratory at Nihon University. For this purpose, we are working to implement functionality that outputs LoRa-modulated signals.