Rafael Armando RODRIGUEZ LEON, Kenichi ASAMI, Kei-Ichi OKUYAMA

Optimization of a Nano-Satellite Communication System Through a Software Defined Radio (SDR) Platform Implementation

In small satellite communications systems, Software Defined Radios (SDR) have been used for increase the system flexibilization both in the space segment and on the ground station implementations. In this paper, an SDR implementation for the space segment is proposed in order to optimize the communication system designed for the Low Earth Orbit (LEO) environment observation satellite (Ten-Koh). This optimization consists in the integration of a Raspberry Pi module and a LimeSDR-mini RF module using embedded Linux, Python and GNU radio tools. The Ten-Koh mission, communication system architecture, on-orbit mission constraints and issues will be described in order to be compared with the proposed optimization to demonstrate the improvements in terms of performance, flexibility and developing time. The purpose is to demonstrate that the proposed system can be replaced safely in future satellite missions similar to Ten-Koh meeting the mission requirements.

Yazılım Tanımlı Radyo (YTR) Platform Uygulaması ile Bir Nano Uydu Haberleşme Sisteminin Optimizasyonu

Küçük uydu haberleşme sistemlerinde, Yazılım Tanımlı Radyolar (YTR) hem yer istasyonlarındaki hem de uzay sistemlerindeki uygulamaların sistem esnekliklerini arttırmakta kullanılmıştır. Bu çalışmada, düşük dünya yörüngesindeki çevre gözlem uydusu Ten-Koh için tasarlanan haberleşme sistemi kullanılmış ve uydu üzerindeki sistemin optimizasyonu amacıyla YTR uygulaması önerilmiştir. Bu optimizasyon çalışması, gömülü Linux, Python ve GNU radyo araçlarını kullanan Raspberry Pi ve LimeSDR-mini RF modüllerini içermektedir. Optimizasyon çalışması sonucunda görülen performans, esneklik ve geliştirme süresi iyileşmeleri açıklanarak, Ten-Koh görevi, haberleşme sistem mimarisi, yörüngedeki görev kısıtlamaları ve sorunları ile karşılaştırmada kullanılmıştır. Bu çalışmadaki amaç, önerisi yapılan sistemin Ten-Koh görevine benzeyen gelecekteki uydu sistemlerinde kullanılabileceğini göstermektir.

PDF

___

[1] SatNOGS.org, "SatNOGS WIKI," 2019. [Online]. Available: https://wiki.satnogs.org/Main_Page. [Accessed 14 May 2019].

[2] Gara Quintana and Roger Birkeland, “Software-Defined Radios in Satellite Communications”, The 4S Symposium, May/June 2018.

[3] Tsvetan Dachev, B. Tomov, Pl. Dimitrov, Yu Matviichuk, K. Fujitaka, Y. Uchihori and H. Kitamura, “Calibration of LIULIN-4 type system at HIMAC with heavy ions” (11P-084), (2001).

[4] F. Kuroiwa, K. Okuyama, M. Nishio, H. Morita, B.A. Szasz, S.A. Bendoukha, P. Saganti and D. Holland, “A Design Method of an Autonomous Control System for a Deep-Space Probe”, Transactions of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology, Japan, 14 (2016), pp. 105-112.

[5] F. Kuroiwa, S.A. Bendoukha, K. Okuyama, H. Morita and M. Nishio, “A Redundancy and Operation of Power Control System for a Deep-space Small Probe”, Journal of Automation and Control Engineering, (2016), pp.353-359.

[6] Ryu Funase, Y. Nakamura, M. Nagai, T. Eishima, K. Nakada, Akito Enokuchi, C. Yuliang, E. Takei and S Nakasuka, “University of Tokyo's Student Nano-Satellite Project CubeSat-XI and Its On-Orbit Experiment Results”, IFAC Proceedings, 37 (2004), pp. 901-906.

[7] H. Kawakubo, “Hardware Development of a Microcontroller Board for a Small Satellite”, Proceedings of the 16th AIAA/USU Conference on Small Satellites, Utah State University, (2002).

[8] Microchip Technology Inc. “28/40-Pin 8-Bit CMOS FLASH Microcontrollers,” 2013. [Online]. Available: http://ww1.microchip.com/downloads/en/DeviceDoc/30292D.pdf. [Accessed 14 May 2019].

[9] Nishimusen CO., "TXE430MFMCW-302A," 2019. [Online]. Available: http://www.nishimusen.co.jp/eisei2016/eisei2016.htm. [Accessed 14 May 2019].

[10] GNU Radio.org, “GNU Radio Manual and C++ API Reference,” 2019. [Online]. Available: https://www.gnuradio.org/doc/doxygen/build_guide.html. [Accessed 14 May 2019].

[11] SatNOGS.org, “SatNOGS GNU Radio Out-Of-Tree module,” 2019. [Online]. Available: https://gitlab.com/librespacefoundation/satnogs/gr-satnogs. [Accessed 14 May 2019].

[12] D. Estevez, “GNU Radio decoders for several Amateur satellites,” 2019. [Online]. Available: https://github.com/daniestevez/gr-satellites. [Accessed 14 May 2019].

[13] Tim K., “gr-bruninga GNU Radio Out-Of-Tree module,” 2017. [Online]. Available: https://github.com/tkuester/gr-bruninga. [Accessed 14 May 2019].

[14] ISIS – Innovative Solutions In Space. “VHF/UHF duplex transceiver,” 2016. [Online]. Available: https://www.isispace.nl/wp-content/uploads/2016/02/VHF-UHF-Full-Duplex-Transceiver-Brochure-web.pdf. [Accessed 1 Aug 2019].

[15] Ana I. Perez-Neira, Marc Realp Campalans, “Chapter 2 - Different views of spectral efficiency,” in Cross-Layer Resource Allocation in Wireless Communications, Academic Press, 2008, pp. 13-33.

[16] R. Patidar, S. Roy, and T. R. Henderson, “Technical report on validation of error models for 802.11n,” University of Washington Seattle, Tech. Rep., 05 2017.