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Researchers
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ICHIGE Koichi
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University of Tsukuba Doctor Course Completed
University of Tsukuba Graduated
Doctor of Engineering - University of Tsukuba
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Professor
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Associate Professor
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Associate Professor
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Lecturer
Duty Yokohama National UniversitySchool of Engineering Lecturer
Swiss Federal Institute of Technology Lausanne (EPFL), Switzerland Visiting Researcher
The Institute of Electronics,Information and Communication Engineers
IEEE
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
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
A Study on Improvements in Computational Efficiency of a Filter Design
1999.3
Doctoral Thesis Single Work
Discrete B-spline Functions and Their Application to B-spline Decomposition and Reconstruction of Signals
1994.3
Master Thesis Single Work
Optimization of Microwave Circuit Parameters by CMA-ES Method
Kosuke Hayashi, Koichi Ichige
IEICE Communications Express 10 ( 9 ) 681 - 687 2021.5 [Reviewed]
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
FMCW radar with multiple initial frequencies for robust source number estimation
Saito Ryo, Kashiwagi Katsuhisa, Arakawa Nobuya, Hamada Shohei, Ichige Koichi
IEICE COMMUNICATIONS EXPRESS 10 ( 9 ) 698 - 703 2021.5 [Reviewed]
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>We propose a novel method to estimate source number used in Direction Of Arrival (DOA) estimator for Frequency Modulated Continuous Wave - Multiple-Input Multiple-Output (FMCW-MIMO) radar. The main principle is that the phase of the intermediate signals can be modified by the initial frequency of transmitted signals. We confirmed that our method can distinguish true and spurious sources when the number of sources is larger than the number of true sources.</p>
Other Link： https://ci.nii.ac.jp/naid/130008082843
Design of Sparse Arrays via Deep Learning for Enhanced DOA Estimation
Steven Wandale, Koichi Ichige
EURASIP Journal of Advances in Signal Processing 2021 ( 1 ) 17-1 - 17-14 2021.4 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：Springer Joint Work
NAKAMURA Shogo, IWAZAKI Sho, ICHIGE Koichi
IEICE Transactions on Communications 104 ( 4 ) 401 - 409 2021.4 [Reviewed]
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>This paper presents a method to optimize 2-D sparse array configurations along with a technique to interpolate holes to accurately estimate the direction of arrival (DOA). Conventional 2-D sparse arrays are often defined using a closed-form representation and have the property that they can create hole-free difference co-arrays that can estimate DOAs of incident signals that outnumber the physical elements. However, this property restricts the array configuration to a limited structure and results in a significant mutual coupling effect between consecutive sensors. In this paper, we introduce an optimization-based method for designing 2-D sparse arrays that enhances flexibility of array configuration as well as DOA estimation accuracy. We also propose a method to interpolate holes in 2-D co-arrays by nuclear norm minimization (NNM) that permits holes and to extend array aperture to further enhance DOA estimation accuracy. The performance of the proposed optimum arrays is evaluated through numerical examples.</p>
Other Link： https://ci.nii.ac.jp/naid/130008014020
周波数帯域分割を用いたCNNによるピアノ音の多重音解析
戸田 大貴, 市毛 弘一
電子情報通信学会論文誌 A J104-A ( 4 ) 110 - 113 2021.4 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：一般社団法人電子情報通信学会 Joint Work
信号処理装置、信号処理システム、信号処理方法、及びプログラム
平原大地，市毛弘一
Application no：2019-**** Date applied：2019.6
Country of applicant：Domestic
Best Paper Award
2018.11 ISPACS 2018
Individual or group name of awards： Yuji Araki, Koichi Ichige
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
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
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
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) (Rennes, France) IEEE
Event date： 2017.12
Language：English Presentation type：Oral presentation (general)
Venue：Rennes, France
DOI: 10.1109/APUSNCURSINRSM.2017.8072623
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 (San Diego, CA, USA) IEEE
Event date： 2017.10
Language：English Presentation type：Oral presentation (general)
Venue：San Diego, CA, USA
DOI: 10.1109/APUSNCURSINRSM.2017.8072623
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)
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)
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)
2021 回路解析Ⅰ
College of Engineering Science
2021 回路解析
College of Engineering Science
2021 ディジタルメディアのしくみⅡ
Interfaculty Graduate School of Innovative and Practical Studies
2021 ディジタルメディアのしくみⅠ
Interfaculty Graduate School of Innovative and Practical Studies
2021 システム設計実習
Graduate school of Engineering Science
電子情報通信学会英文論文誌A
2019.6 編集幹事
Committee type：Academic society
国際会議ISAPS2020
2017.7 論文委員会副委員長
Committee type：Academic society
電子情報通信学会
2016.2 - 2017.7 論文誌EB分冊ISAP2016特集号編集委員
Committee type：Academic society
国際会議ISCAS2019
2015.2 財務委員長
Committee type：Academic society
電子情報通信学会
2015.1 - 2018.5 論文誌EA分冊編集委員
Committee type：Academic society
