Home > Leadership Development Seminars > 4. Monozukuri seminar > Development of digital receives for satellite beacon by Software Defined Radio Technology

Development of digital receives for satellite beacon by Software Defined Radio Technology

Date & Time: July 25, 2014 (Fri) 16:30-18:00
Place: C5 Lecture Room (C517), School of Science Building C
Speaker: Prof. Mamoru Yamamoto (Research Institute for Sustainable Humanosphere, Kyoto University)
Language: English

*This seminar will be organized by program students.

Outline:
A simple digital receiver named "GNU Radio Beacon Receiver (GRBR)" was developed for the satellite-ground beacon experiment to measure the ionospheric total electron content (TEC). The open-source Software toolkit for the software defined radio, GNU radio, is utilized to realize the basic function of the receiver, and perform fast signal processing. The software is written in Python for a LINUX PC. The open-source hardware called Universal Software Radio Peripheral(USRP), which best matches the GNU Radio, is used as a frontend to acquire the satellite beacon signals of 150 and 400 MHz. The first experiment was successful as results from GRBR showed very good agreement to those from the co-located analog beacon receiver. Detailed design information and software codes are open at the URL http://www.rish.kyoto-u.ac.jp/digitalbeacon/. A dense observation network to study ionosphere is deployed over Southeast Asian countries of Indonesia, Thailand, and Vietnam by Japanese institutes, Research Institute for Sustainable Humanosphere (RISH), Kyoto University, National Institute of Information and Communications Technology (NICT), Solar-Terrestrial Environmental Laboratory (STEL), Nagoya University. The GRBR network is very useful for the studies of the low-latitude ionosphere.

In the lecture, the lecturer shows measurement technique of the dual-band beacon, system description of the GRBR, and some examples of studies. He also touch Python as a useful programming language for the scientific data analyses.

Introduction:
In 2008, only analogue receiver was available for receiving satellite signals and it was really expensive. However, Prof. Yamamoto developed a digital receiver, utilized to realize the basic function of the receiver. It is cheap but perform fast signal processing. This system can be applicable to receiver for the radars, especially, bi-static radar, radio interferometer measurements, and so on. There is a possibility that this receiver is useful for the instruments related to satellites, which transmit and receive radio waves. This digital beacon receiver is a new creation and brings many of good values on researching. His experiences are very useful for LGS students, who could think about new ideas in research, just from a very simple thing but get a big values in the science technology. Prof. Mamoru Yamamoto is working in the Research Institute for Sustainable Humanosphere (RISH), Department of Communications and Computer Engineering, Kyoto University. He plays an important role in the development of Mid-Upper radar (MU) and Equatorial Atmosphere Radar (EAR). He could have a good view on leading a big project and international collaboration.

Reference:
http://www.rish.kyoto-u.ac.jp/labs/yamamoto-lab/members/yamamoto/yamamoto-e.html
http://www.rish.kyoto-u.ac.jp/labs/yamamoto-lab/detail.html
http://www.rish.kyoto-u.ac.jp/digitalbeacon/index.html

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