��c�@��P: Hiroki IWATA

Mail : iwa-hiro [at] go.tuat.ac.jp From : �{�茧�s��s Education : �s�鍂�� �� �����_�H��w (3�N���ғ�) �� �����_�H��w��w�@ ���m�O���ے��������_�H��w ���m����ے� Membership : IEEE & IEICE Link : Curriculum Vitae (PDF)
       Google Scholar ResearchGate
�������e: Research Topic
�wSmart Spectrum Access�ɂ�����d�g���p�ϑ��y�ѓd�g���p�̊w�K�Z�p�x

�����Ɛ�: Publications
�_����: Journal
�� Hiroki Iwata, Kenta Umebayashi, Janne J. Lehtomäki, Shusuke Narieda, "Welch FFT Segment Size Selection Method for FFT Based Wide Band Spectrum Measurement," IEICE Transactions on Communications, vol.E101-B, no. 7, Jul. 2018.
Link to paper page
�� Hiroki Iwata, Kenta Umebayashi, Samuli Tiiro, Janne J. Lehtomäki, Miguel López-Benítez, and Yasuo Suzuki, "Welch FFT Segment Size Slection Method for Spectrum Awareness System," IEICE Transactions on Communications, vol.E99-B, no. 8, Aug. 2016.
Link to paper page
�� Kenta Umebayashi, Kazuki Moriwaki, Riki Mizuchi, Hiroki Iwata, Samuli Tiiro, Janne J. Lehtomäki, Miguel López-Benítez, and Yasuo Suzuki, "Simple Primary User Signal Area Estimation for Spectrum Measurement," IEICE Transactions on Communications, vol.E99-B, no. 2, Feb. 2016.
Link to paper page

���ۉ�c: International Conference
�� Hiroki Iwata, Kenta Umebayashi, Satya Joshi, Ahmed Al-Tahmeesschi, Miguel López-Benítez and Janne J. Lehtomäki,"A Study on High-Efficiency Energy Detection-Based Spectrum Measurements," IEEE Wireless Communications and Networking Conference Workshop (WCNCW) - International Workshop on Smart Spectrum (IWSS), Seoul, South Korea, Apr. 2020 (Refereed, Accepted).
�� Hiroki Iwata, Kenta Umebayashi, "[Poster Presentation] An Efficient Noise Floor Estimation for Spectrum Measurements," International Workshop on Smart Wireless Communications (SmartCom), New Jersey, USA, Nov. 2019 (Non-Refereed).
�� Hiroki Iwata, Kenta Umebayashi, Ahmed Al-Tahmeesschi, Miguel López-Benítez and Janne J. Lehtomäki,"Time and Frequency Varying Noise Floor Estimation for Spectrum Usage Measurement," IEEE Wireless Communications and Networking Conference Workshop (WCNCW) - International Workshop on Smart Spectrum (IWSS), Marrakech, Morocco, Apr. 2019 (Refereed).
IEEE Xplore
�� Hiroki Iwata, Kenta Umebayashi, Ahmed Al-Tahmeesschi and Miguel López-Benítez, "[Poster Presentation] Neural Network-based Channel Occupancy Rate Prediction," International Workshop on Smart Wireless Communications (SmartCom), Bangkok, Thailand, Oct. 2018 (Non-Refereed).
�� Hiroki Iwata, Kenta Umebayashi, Janne J. Lehtomäki, Miguel López-Benítez and Shusuke Narieda, "[Poster] Development of a smart specrum access prototype," European Conference on Networks and Communications (EuCNC), Oulu, Finland, June 2017 (Refereed).
�� Kenta Umebayashi, Hiroki Iwata, Janne J. Lehtomäki and Miguel López-Benítez, "Study on Simple Signal Area Estimation for Efficient Spectrum Measurements," European Conference on Networks and Communications (EuCNC), Oulu, Finland, June 2017 (Refereed).
IEEE Xplore
�� Hiroki Iwata, Kenta Umebayashi, Samuli Tiiro, Janne J. Lehtomäki, and Yasuo Suzuki, "A study on Welch FFT segment size selection method for spectrum awareness," IEEE Wireless Communications and Networking Conference Workshop (WCNCW) - International Workshop on Smart Spectrum (IWSS), Doha, Qatar, Apr. 2016 (Refereed). �yBest paper award�z
IEEE Xplore
�� Kenta Umebayashi, Riki Mizuchi, Hiroki Iwata, Kazuhiro Hayashi, Masanao Kobayashi, Samuli Tiiro, Yoshitaka Tamaki, Tatsuya Maruyama, Janne J. Lehtomäki, Miguel López-Benítez and Yasuo Suzuki, "Spectrum awareness system prototype for smart spectrum access," Technology Exhibit at International Workshop on Smart Wireless Communications (SmartCom), Tokyo, Japan, Oct. 2015 (Non-Refereed).
�� Hiroki Iwata, Kenta Umebayashi, Samuli Tiiro, Yasuo Suzuki, and Janne J. Lehtomäki, "Optimum welch FFT segment size for duty cycle estimation in spectrum awareness system," IEEE Wireless Communications and Networking Conference Workshop (WCNCW) - International Workshop on Smart Spectrum (IWSS), New Orleans, USA, Mar. 2015 (Refereed).
IEEE Xplore
�� Hiroki Iwata, Kenta Umebayashi, Riki Mizuchi, Tatsuya Maruyama, Kazuki Moriwaki, Samuli Tiiro, Janne J. Lehtomäki, and Yasuo Suzuki, "Development of a measurement system for spectrum awareness -- Duty estimation based on Welch-FFT --," Technology Exhibit at International Workshop on Smart Wireless Communications (SmartCom), Singapore, Oct. 2014 (Non-Refereed).

�������\: Domestic Conference
�� ��c ��P, �~�� ����, "SNR����𔺂��d�͌��o臒l�̐ݒ�Ɋւ���ꌟ��",�d�q���ʐM�w��Z�p��, vol. 119, no. 325, SR2019-102, pp. 75-82, Dec. 2019.
�� ��c ��P, Ahmed Al-Tahmeesschi, �~�� ����, "[�˗��u��]�@�_�C�i�~�b�N���g�����p�̂��߂̎��g�����p�ϑ��V�X�e���̊J��",���m���l�b�g���[�L���O�Ɋւ��镪�쉡�f�^������iRISING�j, Dec. 2019.
�� �}���F��, ��c ��P, Ahmed Al-Tahmeesschi, �~�� ����, "[�|�X�^�[�u��]��Ԕ���Ɋ�Â����ċA�^�j���[�����l�b�g���[�N��p�������g�����p���\���̈ꌟ��",���m���l�b�g���[�L���O�Ɋւ��镪�쉡�f�^������iRISING�j, Dec. 2019.
�� ��� �q��, ��c ��P, �~�� ����, Janne Lehtomäki, Miguel López-Benítez, Satya Joshi, "Duty Cycle��AR���f�����Ɋւ���ꌟ��",�d�q���ʐM�w��Z�p��, vol. 119, no. 109, SR2019-29, pp. 59-64, Jul. 2019.
�� ��c ��P, �~�� ����, "�m�Z�p�W���n�X�}�[�g�X�y�N�g�����A�N�Z�X�̂��߂̋����^���g�����p�ϑ��V�X�e���v���g�^�C�v�̊J��", �d�q���ʐM�w��Z�p��, vol. 119, no. 62, SR2019-16, pp. 97-103, ����, May 2019.
�� ��c ��P, �~�� ����, ���� ��, �R�c ���l, ��� �q��, �}�� �F��, Janne Lehtomäki, Miguel López-Benítez, "�m�Z�p�W���n�X�}�[�g�X�y�N�g�����A�N�Z�X�̂��߂̎��g�����p�ϑ��V�X�e���v���g�^�C�v�̊J�� ~���g�����p���̗\�� ~", �d�q���ʐM�w��Z�p��, vol. 118, no. 58, SR2018-17, pp. 99-106, ����, May 2018.
�� ��c ��P, �~�� ����, Janne Lehtomäki, Miguel López-Benítez, "���g�����p�ϑ��̂��߂̎���-���g���ϓ�����m�C�Y�t���A����@", �d�q���ʐM�w��Z�p��, vol. 117, no. 410, SR2017-101, pp. 43-50, ����, Jan. 2018.
�� ��c ��P, �~�� ����, �ʖ� �`�F, �� ���, ���� ��, ���} �G��, "�m�Z�p�W���n�X�}�[�g�X�y�N�g�����A�N�Z�X�v���g�^�C�v�̊J��", �d�q���ʐM�w��Z�p��, vol. 117, no. 56, SR2017-16, pp. 97-104, ����, May 2017.
�� ��c ��P, �~�� ����, Janne J. Lehtomäki, ��� �N�v, "���g�����p�ϑ��̂��߂̒�R�X�g��Welch FFT�Z�O�����g�T�C�Y�I��@�̉��", �d�q���ʐM�w��Z�p��, vol. 115, no. 411, SR2015-72 , pp. 1-8, ����, Jan. 2016.
�� ��c ��P, �~�� ����, Samuli Tiiro, Janne J. Lehtomäki, ��� �N�v, "Duty Cycle����ɓK����Welch FFT�̃Z�O�����g�T�C�Y�I��@", �d�q���ʐM�w��Z�p�񍐁Cvol. 114, no. 435, SR2014-110, pp. 101-108, ����, Jan. 2015.

�w�ʘ_��: Thesis
�� Ph.D. thesis : High-Efficient Wideband Spectrum Measurement based on FFT for Dynamic Spectrum Access
TUAT Repositry
�� Master thesis : ���g�����p�ϑ��̂��߂̎��g���̈�ɂ����鍂���x�ȐM�����o�Ɋւ��錤�� (written in Japanese)
�� Bachelor thesis : ���k�Z���V���O�@��p���ď����W�R�X�g�̍팸��}���������X�y�N�g���Z���V���O�@ (written in Japanese)

�C�O������: Overseas Research
�� University of Liverpool, UK (July 2018 - Aug. 2018 )
�� Centre for Wireless Communications, University of Oulu, Finland (Aug. 2015 - Sep. 2015, Nov. 2016)
�� University of Hawaii at Manoa, USA (Mar. 2014)

��ܗ�: Awards
�� Best Paper Award for the 2nd international workshop on smart spectrum (IWSS) @ IEEE wireless communications and networking conference (WCNC) (Apr. 2016)
�� Excellent Paper Award for master thesis (Awarded by Department of Electrical and Electronic Engineering, Tokyo University of Agriculture and Technology, Mar. 2016)
�� Excellent Paper Award for bachelor thesis (Awarded by Department of Electrical and Electronic Engineering, Tokyo University of Agriculture and Technology, Mar. 2014)

�: Hobby
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�ЂƂ���: Message
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