Koichi Ichige

82 papers B 3C 8Journal 39Unranked 32
YearRankTypeTitle / Venue / Authors
2026 J jnl
Millimeter-Wave FMCW-MIMO Radar System Using Point-Cloud Feature-Based Decision Tree for Vehicle In-Cabin Infant Occupant Detection.
IEEE Access
Kotone Sato, Steven Wandale, Koichi Ichige, Kazuya Kimura, Ryo Sugiura
2026 J jnl
Region-Aware and Temporally Consistent Human-Object Contact Detection in Video.
IEEE Access
Kaito Kira, Koichi Ichige
2026 J jnl
Simulated Artifacts and Data Augmentation for Real-World Video Motion Deblurring.
IEEE Access
Sota Moriyama, Kaito Kira, Koichi Ichige
2025 J jnl
Diffusion Model-Based Virtual 3D City Augmentation for EM-Wave Propagation Analysis.
IEEE Access
Rento Hagiwara, Kazuki Yuasa, Koichi Ichige, Tatsuya Nagao, Takahiro Hayashi
2025 — conf
Multichannel Speech Enhancement Method Using Dilated Semi-Dense Convolutional Network.
SiPS
Tomohiro Ueyama, Koichi Ichige, Takahiro Murakami
2024 J jnl
An Edge-Enhanced Branch for Multi-Frame Motion Deblurring.
IEEE Access
Sota Moriyama, Koichi Ichige
2024 J jnl
Video Reflection Removal by Modified EDVR and 3D Convolution.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Sota Moriyama, Koichi Ichige, Yuichi Hori, Masayuki Tachi
2023 J jnl
A Generalized Extended Nested Array Design via Maximum Inter-Element Spacing Criterion.
IEEE Signal Process. Lett.
Steven Wandale, Koichi Ichige
2023 J jnl
ECG Signal Reconstruction Using FMCW Radar and a Convolutional Neural Network for Contactless Vital-Sign Sensing.
IEICE Trans. Commun.
Daiki Toda, Ren Anzai, Koichi Ichige, Ryo Saito, Daichi Ueki
2023 — conf
Feature Extraction Using Hough Transform in Radio Propagation Estimation.
VTC Fall
Rento Hagiwara, Koichi Ichige, Tatsuya Nagao, Takahiro Hayashi
2023 J jnl
Low-Cost Learning-Based Path Loss Estimation Using Correlation Graph CNN.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Keita Imaizumi, Koichi Ichige, Tatsuya Nagao, Takahiro Hayashi
2023 — conf
Low-Cost Path Loss Estimation Using Correlation Graph CNN with Novel Feature Parameters.
VTC2023-Spring
Keita Imaizumi, Koichi Ichige, Tatsuya Nagao, Takahiro Hayashi
2023 J jnl
Sparse Array Design for Direction Finding using Deep Learning.
CoRR
Kumar Vijay Mishra, Ahmet M. Elbir, Koichi Ichige
2023 J jnl
xMISC: Improved Sparse Linear Array via Maximum Inter-Element Spacing Concept.
IEEE Signal Process. Lett.
Steven Wandale, Koichi Ichige
2022 J jnl
Accurate Source-Number Estimation Using Denoising Preprocessing and Singular Value Decomposition.
IEICE Trans. Commun.
Shohei Hamada, Koichi Ichige, Katsuhisa Kashiwagi, Nobuya Arakawa, Ryo Saito
2022 — conf
Flexible Extended Nested Array with Multiple Subarrays Achieving Improved Degrees of Freedom.
EUSIPCO
Steven Wandale, Koichi Ichige
2022 J jnl
Flexible extended nested arrays for DOA estimation: Degrees of freedom perspective.
Signal Process.
Steven Wandale, Koichi Ichige
2022 — conf
Learning-Based Path Loss Estimation Using Multiple Spatial Data and System Parameters.
VTC Fall
Kazuya Inoue, Keita Imaizumi, Koichi Ichige, Tatsuya Nagao, Takahiro Hayashi
2021 — conf
A Nested Array Geometry with Enhanced Degrees of Freedom and Hole- Free Difference Coarray.
EUSIPCO
Steven Wandale, Koichi Ichige
2021 J jnl
Design of sparse arrays via deep learning for enhanced DOA estimation.
EURASIP J. Adv. Signal Process.
Steven Wandale, Koichi Ichige
2021 — conf
ECG Signal Reconstruction Using FMCW Radar and Convolutional Neural Network.
ISCIT
Daiki Toda, Ren Anzai, Koichi Ichige, Ryo Saito, Daichi Ueki
2021 — conf
High Accuracy Video Foreground Segmentation Based on Feature Normalization.
ISCIT
Yuma Suzuki, Koichi Ichige
2021 B conf
On The Building Map for Radio Propagation Prediction Using Machine Learning.
PIMRC
Kazuya Inoue, Koichi Ichige, Tatsuya Nagao, Takahiro Hayashi
2021 J jnl
Optimization and Hole Interpolation of 2-D Sparse Arrays for Accurate Direction-of-Arrival Estimation.
IEICE Trans. Commun.
Shogo Nakamura, Sho Iwazaki, Koichi Ichige
2021 J jnl
Simulated Annealing Assisted Sparse Array Selection Utilizing Deep Learning.
IEEE Access
Steven Wandale, Koichi Ichige
2021 J jnl
Single Image Haze Removal Using Iterative Ambient Light Estimation with Region Segmentation.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Yuji Araki, Kentaro Mita, Koichi Ichige
2020 — conf
A Note on The Maximum Number of Sources in DOA Estimation by MODE.
SAM
Shohei Hamada, Koichi Ichige
2020 J jnl
DOA-Based Weighted Spatial Filter Design for Sum and Difference Composite Co-Array.
IEICE Trans. Commun.
Sho Iwazaki, Shogo Nakamura, Koichi Ichige
2020 — conf
On the DOA Estimation Performance of Optimum Arrays Based on Deep Learning.
SAM
Steven Wandale, Koichi Ichige
2019 — conf
DOA-based Weighted Spatial Filter Design for Sum and Difference Composite Co-Array.
ICECS
Sho Iwazaki, Koichi Ichige
2019 J jnl
Extended Beamforming by Sum and Difference Composite Co-Array for Real-Valued Signals.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Sho Iwazaki, Koichi Ichige
2019 C conf
Optimum 2D Sparse Array and its Interpolation via Nuclear Norm Minimization.
ISCAS
Shogo Nakamura, Sho Iwazaki, Koichi Ichige
2019 J jnl
Phase-Difference Compensation and Nonuniform Pulse Transmission for Accurate Real-Time Moving Object Tracking.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Koichi Ichige, Nobuya Arakawa, Ryo Saito, Osamu Shibata
2019 C conf
Super Nested Sparse Circular Array for High Resolution DOA Estimation.
ISCAS
Steven Wandale, Thomas Basikolo, Koichi Ichige
2018 J jnl
A note on CRLB formulation for underdetermined DOA estimation in circularly configured planar arrays.
IEICE Electron. Express
Thomas Basikolo, Koichi Ichige, Hiroyuki Arai
2018 — conf
Automatic Piano Music Transcription using Low Rank NMF and Convolutional Neural Network.
ISPACS
Takeo Kawashima, Koichi Ichige
2018 C conf
Fast Intra Mode Decision Method Based on Outliers of DCT Coefficients and Neighboring Block Information for H.265/HEVC.
ISCAS
Jun Ogata, Koichi Ichige
2018 J jnl
Nested Circular Array and Its Concentric Extension for Underdetermined Direction of Arrival Estimation.
IEICE Trans. Commun.
Thomas Basikolo, Koichi Ichige, Hiroyuki Arai
2018 — conf
Single Image Haze Removal Using Ambient Light Estimation and Region Segmentation.
ISPACS
Yuji Araki, Koichi Ichige
2018 — conf
Underdetermined Direction of Arrival Estimation by Sum and Difference Composite Co-Array.
ICECS
Sho Iwazaki, Koichi Ichige
2017 — conf
Extended beamforming by sum and difference composite co-array for radio surveillance.
WIFS
Sho Iwazaki, Koichi Ichige
2016 J jnl
Array Correlation Matrix Element Properties and Their Application to Low-Cost DOA Estimation.
IEICE Trans. Commun.
Koichi Ichige, Yu Iwabuchi
2016 C conf
Real-time moving object tracking using phase-difference compensation and nonuniform pulse transmission.
ISCAS
Koichi Ichige, Nobuya Arakawa, Osamu Shibata
2016 — conf
Weighted shooting method for high-resolution DOA estimation based on sparse spectrum fitting.
EUSIPCO
Koichi Ichige, Naoki Yotsueda
2015 — conf
An efficient Direction-Of-Arrival estimation method for Uniform Rectangular Array based on array covariance matrix element properties.
CAMSAP
Koichi Ichige, Yu Iwabuchi
2015 C conf
Multiple snapshot spatial smoothing with improved effective array aperture for high-resolution direction-of-arrival estimation.
ICICS
Yuki Iizuka, Koichi Ichige
2015 C conf
Non-iterative coding tree depth estimation for H.265/HEVC using neighboring block information.
ICICS
Jun Ogata, Koichi Ichige
2014 — conf
3-D array configuration using multiple regular tetrahedra for high-resolution 2-D DOA estimation.
EUSIPCO
Yuki Doi, Koichi Ichige, Hiroyuki Arai, Hiromi Matsuno, Masayuki Nakano
2014 — conf
Accurate and low-cost DOA estimation method using array covariance matrix elements.
APCCAS
Yu Iwabuchi, Koichi Ichige
2014 — conf
Antenna switching based on the relation between the relative location of array elements for high resolution 2-D DOA estimation.
ISCCSP
Yuki Doi, Koichi Ichige, Hiroyuki Arai, Hiromi Matsuno, Masayuki Nakano
2014 — conf
DOA estimation for low-cost array antenna system based on GROUSE and EM algorithms.
APCCAS
Keita Yamada, Koichi Ichige
2014 — conf
Direction-of-arrival estimation of coherent sources for ULA based on the relation between array covariance matrix elements.
ISCCSP
Yu Iwabuchi, Hanyang Li, Koichi Ichige
2013 — conf
Cuboid array: A novel 3-D array configuration for high resolution 2-D DOA estimation.
SiPS
Hiroki Moriya, Yuki Doi, Koichi Ichige, Hiroyuki Arai, Takahiro Hayashi, Hiromi Matsuno, Masayuki Nakano
2013 J jnl
High Resolution 2-D DOA Estimation by Low-Cost Antenna Array Based on Synthesized Covariance Matrix via Antenna Switching.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Yuki Doi, Hiroki Moriya, Koichi Ichige, Hiroyuki Arai, Takahiro Hayashi, Hiromi Matsuno, Masayuki Nakano
2013 — conf
High-resolution and low-cost direction-of-arrival estimation by 2q-Root-MUSIC method.
SiPS
Yuta Shikagawai, Koichi Ichige
2013 — conf
Low-cost antenna array via antenna switching for high resolution 2-D DOA estimation.
SiPS
Yuki Doi, Hiroki Moriya, Koichi Ichige, Hiroyuki Arai, Takahiro Hayashi, Hiromi Matsuno, Masayuki Nakano
2012 J jnl
Improving Elevation Estimation Accuracy in DOA Estimation: How Planar Arrays Can Be Modified into 3-D Configuration.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Hiroki Moriya, Koichi Ichige, Hiroyuki Arai, Takahiro Hayashi, Hiromi Matsuno, Masayuki Nakano
2012 — conf
SURE: SimUltaneous Root Extraction method for DOA estimation of coherent sources by ULA.
SAM
Koichi Ichige, Hanyang Li, Hiroyuki Arai
2011 J jnl
Automated Microwave Filter Tuning Based on Successive Optimization of Phase and Amplitude Characteristics.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Yosuke Takeuchi, Koichi Ichige, Koichi Miyamoto, Yoshio Ebine
2009 J jnl
Efficient Heterodyne Digital Receiver with Direct RF-to-Digital Conversion for Software Defined Radio.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Minseok Kim, Takayuki Moteki, Koichi Ichige, Hiroyuki Arai
2008 J jnl
High Resolution DOA Estimation Using Unwrapped Phase Information of MUSIC-Based Noise Subspace.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Koichi Ichige, Kazuhiko Saito, Hiroyuki Arai
2008 C conf
High resolution 2-D DOA estimation using second-order partial-differential of MUSIC spectrum.
ISCAS
Koichi Ichige, Yoshihisa Ishikawa, Hiroyuki Arai
2007 J jnl
High Resolution DOA Estimation Using Second-Order Differential of MUSIC Spectrum.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Koichi Ichige, Yoshihisa Ishikawa, Hiroyuki Arai
2007 C conf
The Design of Phoneme Grouping for Coarse Phoneme Recognition.
IEA/AIE
Kazuhiro Nakadai, Ryota Sumiya, Mikio Nakano, Koichi Ichige, Yasuo Hirose, Hiroshi Tsujino
2006 J jnl
Accurate Source Number Detection Using Pre-Estimated Signal Subspace.
IEICE Trans. Commun.
Yoshihisa Ishikawa, Koichi Ichige, Hiroyuki Arai
2006 J jnl
An Efficient Signed-Power-of-Two Term Allocation for Filter Coefficients in Digital Communication System.
IEICE Trans. Commun.
Koichi Ichige, Hideaki Munemasa, Hiroyuki Arai
2006 — conf
An Explicit High-Resolution DOA Estimation Formula for Two Wave Sources.
ICASSP (4)
Koichi Ichige, Noriaki Takabe, Hiroyuki Arai
2006 — conf
Direction of Arrival Detection System for Radio Surveillance: Frequency Spectrum Analysis of CDMA and Jamming Waves.
VTC Spring
Koichi Ichige, Mitsuharu Imai, Hiroyuki Arai, Masayuki Nakano, Masafumi Hirono
2006 J jnl
Filter Effect on Low-IF Multichannel Receiver: How a Simple Filter Improves Digital Communication Quality.
IEICE Trans. Commun.
Nozomi Zama, Koichi Ichige
2005 J jnl
Experimental Study of Jitter Effect on Digital Downconversion Receiver with Undersampling Scheme.
IEICE Trans. Inf. Syst.
Minseok Kim, Aiko Kiyono, Koichi Ichige, Hiroyuki Arai
2003 — conf
An automatic recognition algorithm of analogue modulated signals for disturbance rejection.
ISSPA (1)
Eriko Matsuzaki, Koichi Ichige, Hiroyuki Arai
2003 — conf
Fixed-point digital processing of recursive least-square algorithm toward FPGA implementation of MMSE adaptive array antenna.
ISSPA (2)
Naoya Matsumoto, Koichi Ichige, Hiroyuki Arai
2003 — conf
Interpolation of signals by generalized piecewise-linear multiple generators.
ICASSP (6)
Koichi Ichige, Thierry Blu, Michael Unser
2002 J jnl
A Computationally Efficient Algorithm for Exponential B-Splines Based on Difference/IIR Filter Approach.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Takeshi Asahi, Koichi Ichige, Rokuya Ishii
2002 B conf
A hardware implementation of LS-CMA adaptive array for high-speed mobile communication.
PIMRC
Atsushi Suzuki, Shintaro Muramatsu, Koichi Ichige, Hiroyuki Arai
2002 B conf
Design of Jacobi EVD processor based on CORDIC for DOA estimation with MUSIC algorithm.
PIMRC
Minseok Kim, Koichi Ichige, Hiroyuki Arai
1998 J jnl
A simple discrete version of B-splines.
Int. J. Syst. Sci.
Koichi Ichige, Masaru Kamada
1998 J jnl
Properties of the frequency transformation matrices for IIR digital filters.
Signal Process.
Koichi Ichige, Naohisa Otsuka, Rokuya Ishii
1997 J jnl
An approximation for discrete B-splines in time domain.
IEEE Signal Process. Lett.
Koichi Ichige, Masaru Kamada
1997 J jnl
An automatic design procedure of IIR digital filters from an analog low-pass filter.
Signal Process.
Koichi Ichige, Naohisa Otsuka, Rokuya Ishii
1996 — conf
Discrete B-spline functions.
EUSIPCO
Koichi Ichige, Masaru Kamada
1996 J jnl
Quadratic spline interpolator.
Int. J. Syst. Sci.
Masaru Kamada, Takafumi Endoh, Koichi Ichige, Kazuo Toraichi