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Jurnal Teknologi DirgantaraJurnal Teknologi Dirgantara

A software-defined radio (SDR) is a radio communication system that uses reconfigurable software-based components for digital signal processing and conversion. These radio devices, in contrast to typical radio communication systems, are extremely adaptable and versatile. This technology has recently been implemented in CubeSat payloads for connecting the continuously expanding wireless world. SDR devices provide flexibility and versatility by allowing the payload configuration and application to be modified in orbit. This study presents the concept and implementation of an SDR ground simulator utilizing inexpensive hardware rather than a typical computer. The simulator runs on Raspberry Pi hardware with Linux OS and is written in the Phyton programming language. This work presents a model and algorithm of satellite software reconfiguration implemented in the SDR hardware ground simulator. The concept is simple and easy to implement and is potentially useful to be used in future satellite missions.

This research successfully developed a model and algorithm to simulate the process of updating or reconfiguring the program on a satellite payload based on SDR, and implemented it using low-cost SDR devices.The study demonstrates the capability of SDR to be reconfigured via telecommand, proving the feasibility of updating payload programs while the satellite is in orbit.The proposed concept is straightforward to implement and offers flexibility in satellite missions by supporting various program file types, including configuration and application files.

Penelitian lebih lanjut dapat dilakukan untuk menguji implementasi sistem rekonfigurasi SDR ini pada lingkungan ruang angkasa yang sebenarnya, termasuk mempertimbangkan efek radiasi dan kondisi ekstrem lainnya terhadap kinerja perangkat keras dan perangkat lunak. Selain itu, studi komprehensif mengenai keamanan sistem rekonfigurasi SDR perlu dilakukan untuk mencegah akses tidak sah dan potensi gangguan terhadap operasi satelit. Pengembangan algoritma adaptif yang dapat secara otomatis mengoptimalkan konfigurasi SDR berdasarkan kondisi lingkungan dan kebutuhan misi juga merupakan arah penelitian yang menjanjikan, sehingga memungkinkan satelit untuk beroperasi secara lebih efisien dan efektif dalam berbagai skenario.

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