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Home > Introduction of our tenure-track faculties > Umebayashi Kenta

Introduction of our tenure-track faculties

Umebayashi Kenta

Affiliation Institute of Engineering
Division Division of Advanced Electrical and Electronics Engineering
Research field Wireless Communications
Keyword(S) Wireless Communications,Digital signal processing,Signal estimation and detection,Cognitive radio
Research experience

・Apr. 2004-Mar. 2006: Centre for Wireless Communications, University of Oulu, Research scientist
・Jun. 2006-Jul. 2013: Assistant Professor, Tokyo University of Agriculture and Technology
・Jul. 2013-Present: Associate Professor, Tokyo University of Agriculture and Technology

Educational background

・Mar. 1996: College of Law, Ritsumeikan university (B. Laws).
・Mar. 1999: Division of Electrical and Computer Engineering, Faculty of Engineering, Yokohama National University (B. Eng.)
・Mar. 2001: Department of Electrical and Computer Engineering, Graduate school of engineering, Yokohama National University, (M. Eng.)
・Mar. 2004: Department of Physics, Electrical and Computer Engineering,
Graduate school of engineering, Yokohama National University, (Dr. Eng.)


・Best Paper Award - PHY and fundamentals at the IEEE WCNC, 2012
・IEICE communication society distinguished service award, 2010, 2012

Selected papers and publications

・M. Tsuji, K. Umebayashi, and Y. Suzuki, "Detection of the Number of Signals with Fewer Sensors than Sources", IEICE Transactions on Communications, Vol.E96-B, No.9, Sep. 2013. (in press)
・J. J Lehtomäki, R. Vuohtoniemi, and K. Umebayashi, "On the Measurement of Duty Cycle and Channel Occupancy Rate", IEEE Journal on Selected Areas in Communications, Vol. 31, No. 8, pp. 1-11, Aug. 2013.
・K. Umebayashi, H. Tsuchiya, Y. Suzuki, "Analysis of Optimal Weighted Cooperative Spectrum Sensing with Multiple Antenna Elements", IEICE Transactions on Communications, Vol. E95-B, No. 10, pp. 3261-3269, Oct. 2012.
・K. Umebayashi, Janne Lehtomäki, T. Yazawa, Y. Suzuki, "Efficient Decision Fusion for Cooperative Spectrum Sensing Based on OR-rule", IEEE Transactions on Wireless Communications, Vol. 11, No. 7, pp. 2585-2595, July 2012.

Research Description

In wireless communications, spectrum is an important resource which has been assigned to existing wireless communication services. However, there are several attractive wireless communication services which have not been deployed due to the lack of available spectrum. The insufficient amount of available spectrum resources is due to the fact that it is a finite resource which has been allocated for wireless services in a fixed manner. This issue is also known as the spectrum scarcity problem.
In our laboratory, we tackle this problem by investigating wireless systems which can utilize the spectrum dynamically, intelligently and politely. Specifically, we are investigating a system which can globally observe the statistics of spectrum utilization in multiple dimensions such as space, time and frequency. In addition, we also develop wireless systems which can utilize the observed information appropriately based on the support by the spectrum observation system.
The aim of our investigation is to achieve flexible and dynamical spectrum allocation which can lead to easier development for new wireless communication services.

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About TUAT's tenure-track program

In the tenure track program, there is a very attractive and well-arranged situation for a young research to set up their own laboratory. This is because in addition to the leading professor acting as a mentor, there is also a startup budget and a research fund. In addition, there are several other tenure track professors in the same situation so it is easy to consult with them.

Future aspirations

In the academic field, we can concentrate on our own interests and tackle our own challenges which is not possible in the industry. Therefore, I will carry out research based on my own beliefs and sensibility. In the university, there are many young students with much potential. I would like to develop friendly competition among them and it should lead to education for the students.