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Affiliation |
Faculty of Engineering, Division of Intelligent Systems Engineering |
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Job Title |
Professor |
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Date of Birth |
1972 |
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Research Fields, Keywords |
Digital Signal Processing, Mobile Communication, Image Processing |
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Mail Address |
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Related SDGs |
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ICHIGE Koichi
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ORCID
Education 【 display / non-display 】
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-1999.3
University of Tsukuba Doctor Course Completed
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-1994.3
University of Tsukuba Graduated
Degree 【 display / non-display 】
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Doctor of Engineering - University of Tsukuba
Campus Career 【 display / non-display 】
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2019.3
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Professor
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2007.4-2019.2
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Associate Professor
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2003.4-2007.3
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Associate Professor
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2001.4-2003.3
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Lecturer
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2001.3
Duty Yokohama National UniversitySchool of Engineering Lecturer
External Career 【 display / non-display 】
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2001.9-2002.9
Swiss Federal Institute of Technology Lausanne (EPFL), Switzerland Visiting Researcher
Academic Society Affiliations 【 display / non-display 】
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1994.4
The Institute of Electronics,Information and Communication Engineers
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1994.4
IEEE
Books 【 display / non-display 】
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Sparse Arrays for Radar, Sonar, and Communications
M. G. Amin Ed.（ Role： Contributor , (Chapter 6: Sparse Array Design for Direction Finding Using Deep Learning)）
Wiley - IEEE Press （ ISBN:9781394191017 ）
Language：English Book type：Scholarly book
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理工系のための解く！ 電気回路２ －交流・基礎編－
竹村泰司，濱上知樹，市毛弘一（ Role： Joint author）
講談社 （ ISBN:4062806015 ）
Language：Japanese Book type：Scholarly book
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理工系のための解く！ 電気回路１ －交流・基礎編－
石井六哉，竹村泰司，濱上知樹，市毛弘一（ Role： Joint author）
講談社 （ ISBN:4061557769 ）
Language：Japanese Book type：Scholarly book
Thesis for a degree 【 display / non-display 】
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A Study on Improvements in Computational Efficiency of a Filter Design
1999.3
Doctoral Thesis Single Work
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Discrete B-spline Functions and Their Application to B-spline Decomposition and Reconstruction of Signals
1994.3
Master Thesis Single Work
Papers 【 display / non-display 】
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Investigation of the Use of Map Images for Stochastic Path Loss Estimation Model
HAGIWARA Rento, ICHIGE Koichi, NAGAO Tatsuya, HAYASHI Takahiro
J107-B ( 3 ) 146 - 154 2024.3
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
In recent years, many path loss estimation models using machine learning have been proposed, but in many cases, high generalization performance has not been achieved. In this paper, we propose a method of feature extraction from images using the Hough transform for path loss estimation to create highly accurate models. By comparing the performance of this method and the conventional method using CNN, we consider effective feature extraction methods.
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RSSI-based indoor localization using two-step XGBoost
Kosaka, T; Wandale, S; Ichige, K
IEICE COMMUNICATIONS EXPRESS 12 ( 12 ) 647 - 650 2023.12
DOI Web of Science CiNii Research
Language：English Publishing type：Research paper (scientific journal) Publisher：一般社団法人 電子情報通信学会 Joint Work
<p>In this letter, we propose a Received Signal Strength Indicator (RSSI)-based indoor localization method using two-step extreme gradient boosting (XGBoost). The proposed two-step XGBoost leverages one of the location coordinates (<i>x</i> or <i>y</i>) as a feature to enhance the estimation accuracy. Simulation examples confirm that the proposed two-step XGBoost approach could improve the estimation accuracy while maintaining low computational complexity.</p>
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Transformer Model Preprocessing and Loss Function Improvement for Accurate ECG Waveform Reconstruction
ANZAI Ren, ICHIGE Koichi
J106-B ( 11 ) 756 - 759 2023.11
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
In this paper, we propose a method of ECG (ElectroCardioGram) signal reconstruction using a transformer, which is a kind of deep learning model. By improving the loss function and preprocessing of the transformer model, we propose a method that can reconstruct the signal even under the condition of high amplitude noise, which has been a problem in conventional methods.
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xMISC: Improved Sparse Linear Array via Maximum Inter-Element Spacing Concept
Steven Wandale, Koichi Ichige
IEEE Signal Processing Letters 30 1327 - 1331 2023.9 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
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Low-Cost Learning-Based Path Loss Estimation Using Correlation Graph CNN
Keita IMAIZUMI, Koichi ICHIGE, Tatsuya NAGAO, Takahiro HAYASHI
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E106.A ( 8 ) 1072 - 1076 2023.8 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
Awards 【 display / non-display 】
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2021.10 国際会議 ISCIT 組織委員会 ECG Signal Reconstruction Using FMCW Radar and Convolutional Neural Network
Individual or group name of awards：戸田大貴（理工学府M2），安済練（理工学府M1），市毛弘一
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Best Paper Award
2018.11 ISPACS 2018
Individual or group name of awards：Yuji Araki, Koichi Ichige
Grant-in-Aid for Scientific Research 【 display / non-display 】
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スパースアレーによる拡張アレー信号処理とその高精度センシング応用
2020.4 - 2023.3
科学研究費補助金 Grant-in-Aid for Scientific Research(C)
Investigator(s)：市毛弘一
Grant type：Competitive
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スパース信号表現に基づいた高速移動体追跡技術とそのスポーツ競技戦略分析への応用
2016.4 - 2019.3
科学研究費補助金 Grant-in-Aid for Scientific Research(C)
Investigator(s)：市毛弘一
Grant type：Competitive
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マイクロセル環境下での3次元構造マルチアンテナシステムの開発
2013.4 - 2016.3
科学研究費補助金 Grant-in-Aid for Scientific Research(C)
Investigator(s)：市毛弘一
Grant type：Competitive
Other external funds procured 【 display / non-display 】
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スパースアレーと機械学習の融合による電波伝搬環境推定の新たな展開
2023.7 - 2024.3
Ministry of Public Management, Home Affairs, Posts and Telecommunications 戦略的情報通信研究開発推進事業(SCOPE)
Presentations 【 display / non-display 】
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Extended beamforming by sum and difference composite co-array for radio surveillance
Sho Iwazaki, Koichi Ichige
2017 IEEE Workshop on Information Forensics and Security (WIFS) IEEE
Event date： 2017.12
Language：English Presentation type：Oral presentation (general)
Venue：Rennes, France
DOI: 10.1109/APUSNCURSINRSM.2017.8072623
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Underdetermined DOA estimation in the presence of mutual coupling for sparse circular array
Thomas Basikolo, Koichi Ichige, Hiroyuki Arai
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting IEEE
Event date： 2017.10
Language：English Presentation type：Oral presentation (general)
Venue：San Diego, CA, USA
DOI: 10.1109/APUSNCURSINRSM.2017.8072623
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Multi-sensor Indoor Target Localization Based on Multipath Exploitation
N. Arakawa, K. Ichige
International Conference on Indoor Positioning and Indoor Navigation
Event date： 2017.9
Language：English Presentation type：Oral presentation (general)
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Accurate RSSI-Based Indoor Localization Using Time-Domain Path Loss Compensation
R. Saito, K. Ichige, T. Ishihara, A. Nakazawa
International Conference on Indoor Positioning and Indoor Navigation, no. 207
Event date： 2017.9
Language：English Presentation type：Oral presentation (general)
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An Efficient Direction-Of-Arrival Estimation Method Based on Weighted Sparse Spectrum Fitting
Koichi Ichige
Signal Processing with Adaptive Sparse Structured Representations Workshop
Event date： 2017.6
Language：English Presentation type：Oral presentation (general)
Charge of on-campus class subject 【 display / non-display 】
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2024 Inside Digital Media Ⅱ
Interfaculty Graduate School of Innovative and Practical Studies
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2024 Inside Digital Media Ⅰ
Interfaculty Graduate School of Innovative and Practical Studies
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2024 Practical System Design
Graduate school of Engineering Science
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2024 Advanced Digital Circuit Theory
Graduate school of Engineering Science
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2024 Advanced electromagnetic wave design F
Graduate school of Engineering Science
Committee Memberships 【 display / non-display 】
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電子情報通信学会信号処理研究専門委員会
2022.6 副委員長
Committee type：Academic society
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電子情報通信学会英文論文誌A
2019.6 - 2021.5 編集幹事
Committee type：Academic society
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国際会議ISAP2020
2017.7 - 2021.2 論文委員会副委員長
Committee type：Academic society
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国際会議ISCAS2019
2015.2 - 2020.5 財務委員長
Committee type：Academic society
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電子情報通信学会英文論文誌A
2015.1 - 2018.5 編集委員
Committee type：Academic society