Department of Communication Network Engineering, Faculty of Engineering, Okayama University



Tomisato Shigeru

Okayama Univ. Graduate School of Natural Science and Technology
Associate Professor




Biography

  He received the B.E. and Ph.D. degrees in communication engineering from Osaka University, Osaka, Japan, in 1987 and 2002, respectively.In April 1987, he joined Nippon Telegraph and Telephone Corporation (NTT), and he engaged in research on modulation and demodulation techniques for digital mobile radio communication systems. From July 1992 to June 2003, he was with NTT Mobile Communication Network, Inc. (now NTT DoCoMo, Inc.), where he was a Senior Research Engineer of Radio Signal Processing Laboratory in Wireless Laboratories.Since July 2003, he has been with Okayama University, Okayama, Japan. He is a member of the IEICE Japan and the IEEE.

Subjects of research

　　(1) Multiple Antenna Transmission Technique

Research on signal processing for future high capacity mobile communication systems with MIMO channel signal transmission techniques.

　　(2) OFDM Transmission / Frequency Domain Equalization Techniques

Research on the establishment of transmitter and receiver design for OFDM transmission and frequency domain equalization.

　　(3) Mobile Seamless Transmission Technique

Research on transmission techniques to offer seamless service areas where users can make communications without any considerations on vehicular, pedestrian, indoor, and other mobile environments.


Publications

[1] S. Tomisato and M. Hata, "PAPR Reduction Method Using Adaptive Peak Reduction Signal Control for OFDM Transmission Systems," Proc. of the Wireless Personal and Mobile Communication, WPMC 2004, TA7-5, pp.V2.440-443, Sept. 2004.

[2] S. Tomisato and M. Hata, "Peak power reduction method using adaptive peak reduction signal level control for OFDM transmission systems," IEICE Trans. Fundamentals, vol.E88-A, no.7, pp.1897-1902, July 2005.

[3] A. Kubo, S. Tomisato, and M. Hata, "Transmission performance of highly efficient OFDM signals with iterative peak reduction", Proc. of the 2nd IEEE VTS Asia Pacific Wireless Communication Symposium, APWCS 2005, pp.145-148, Aug. 2005.

[4] S. Tomisato and M. Hata, "Transmission performance of OFDM signals with iterative peak reduction by using a non-linear power amplifier", Proc. CD of the 10th International Symposium on Microwave and Optical Technology, ISMOT 2005, pp.139-142, Aug. 2005.

[5] S. Tomisato, A. Kubo, H. Fujii, and M. Hata, "Highly efficient OFDM transmission by using adaptive peak-reduction signal processing", Proc. CD of the 15th IST Mobile & Wireless Communications Summit, IST Summit 2006, pp.684.1-684.4, June 2006.

[6] A. Kubo, S. Tomisato, M. Hata, and H. Yoshino, "Transmission performance evaluation for designing an OFDM transmitter that offers iterative peak reduction", IEICE Trans. Fundamentals, vol.E89-A, no.7, pp.1968-1971, July 2006.

[7] T. Matsuda, S. Tomisato, M. Hata, H. Fujii, and H. Yoshino, "PAPR performance of iterative clipping and filtering with a roll-off filter for OFDM transmission", Proc. of the 3rd IEEE VTS Asia Pacific Wireless Communication Symposium, APWCS 2006, pp.218-221, Aug. 2006.

[8] T. Matsuda, S. Tomisato, M. Hata, H. Fujii, and J. Hagiwara, "Peak reduction improvement in iterative clipping and filtering with a graded band-limiting filter for OFDM transmission", IEICE Trans. Fundamentals, vol.E90-A, no.7, pp.1362-1365, July 2007.

[9] S. Tomisato, M. Nishizaki, M. Hata, H. Fujii, and J. Hagiwara, "An iterative peak-power reduction method applicable to OFDM systems for broadband wireless communications", Proc. CD of the 16th IST Mobile & Wireless Communications Summit, IST Summit 2007, pp.P3.5.1-P3.5.5, July 2007.

[10] S. Tomisato, S. Denno, and M. Hata, "A transmit beamforming method by using sensor collaboration for wireless sensor network systems", Proc. CD of the 11th International Symposium on Microwave and Optical Technology, ISMOT 2007, pp.793-796, Dec. 2007.