Koichi Ichige

Publication Activity (10 Years)

Years Active: 1996-2024
Publications (10 Years): 38

Top Topics

Convolutional Neural Network

Direction Of Arrival

Top Venues

IEICE Trans. Commun.

IEICE Trans. Fundam. Electron. Commun. Comput. Sci.

Publications

Sota Moriyama, Koichi Ichige, Yuichi Hori, Masayuki Tachi
Video Reflection Removal by Modified EDVR and 3D Convolution. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 107 (8) (2024)
Steven Wandale, Koichi Ichige
A Generalized Extended Nested Array Design via Maximum Inter-Element Spacing Criterion. IEEE Signal Process. Lett. 30 (2023)
Kumar Vijay Mishra, Ahmet M. Elbir, Koichi Ichige
Sparse Array Design for Direction Finding using Deep Learning. CoRR (2023)
Daiki Toda, Ren Anzai, Koichi Ichige, Ryo Saito, Daichi Ueki
ECG Signal Reconstruction Using FMCW Radar and a Convolutional Neural Network for Contactless Vital-Sign Sensing. IEICE Trans. Commun. 106 (1) (2023)
Rento Hagiwara, Koichi Ichige, Tatsuya Nagao, Takahiro Hayashi
Feature Extraction Using Hough Transform in Radio Propagation Estimation. VTC Fall (2023)
Steven Wandale, Koichi Ichige
xMISC: Improved Sparse Linear Array via Maximum Inter-Element Spacing Concept. IEEE Signal Process. Lett. 30 (2023)
Keita Imaizumi, Koichi Ichige, Tatsuya Nagao, Takahiro Hayashi
Low-Cost Learning-Based Path Loss Estimation Using Correlation Graph CNN. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 106 (8) (2023)
Keita Imaizumi, Koichi Ichige, Tatsuya Nagao, Takahiro Hayashi
Low-Cost Path Loss Estimation Using Correlation Graph CNN with Novel Feature Parameters. VTC2023-Spring (2023)
Steven Wandale, Koichi Ichige
Flexible Extended Nested Array with Multiple Subarrays Achieving Improved Degrees of Freedom. EUSIPCO (2022)
Shohei Hamada, Koichi Ichige, Katsuhisa Kashiwagi, Nobuya Arakawa, Ryo Saito
Accurate Source-Number Estimation Using Denoising Preprocessing and Singular Value Decomposition. IEICE Trans. Commun. (6) (2022)
Kazuya Inoue, Keita Imaizumi, Koichi Ichige, Tatsuya Nagao, Takahiro Hayashi
Learning-Based Path Loss Estimation Using Multiple Spatial Data and System Parameters. VTC Fall (2022)
Steven Wandale, Koichi Ichige
Flexible extended nested arrays for DOA estimation: Degrees of freedom perspective. Signal Process. 201 (2022)
Yuji Araki, Kentaro Mita, Koichi Ichige
Single Image Haze Removal Using Iterative Ambient Light Estimation with Region Segmentation. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (2) (2021)
Steven Wandale, Koichi Ichige
A Nested Array Geometry with Enhanced Degrees of Freedom and Hole- Free Difference Coarray. EUSIPCO (2021)
Steven Wandale, Koichi Ichige
Simulated Annealing Assisted Sparse Array Selection Utilizing Deep Learning. IEEE Access 9 (2021)
Kazuya Inoue, Koichi Ichige, Tatsuya Nagao, Takahiro Hayashi
On The Building Map for Radio Propagation Prediction Using Machine Learning. PIMRC (2021)
Shogo Nakamura, Sho Iwazaki, Koichi Ichige
Optimization and Hole Interpolation of 2-D Sparse Arrays for Accurate Direction-of-Arrival Estimation. IEICE Trans. Commun. (4) (2021)
Steven Wandale, Koichi Ichige
Design of sparse arrays via deep learning for enhanced DOA estimation. EURASIP J. Adv. Signal Process. 2021 (1) (2021)
Yuma Suzuki, Koichi Ichige
High Accuracy Video Foreground Segmentation Based on Feature Normalization. ISCIT (2021)
Daiki Toda, Ren Anzai, Koichi Ichige, Ryo Saito, Daichi Ueki
ECG Signal Reconstruction Using FMCW Radar and Convolutional Neural Network. ISCIT (2021)
Sho Iwazaki, Shogo Nakamura, Koichi Ichige
DOA-Based Weighted Spatial Filter Design for Sum and Difference Composite Co-Array. IEICE Trans. Commun. (10) (2020)
Steven Wandale, Koichi Ichige
On the DOA Estimation Performance of Optimum Arrays Based on Deep Learning. SAM (2020)
Shohei Hamada, Koichi Ichige
A Note on The Maximum Number of Sources in DOA Estimation by MODE. SAM (2020)
Koichi Ichige, Nobuya Arakawa, Ryo Saito, Osamu Shibata
Phase-Difference Compensation and Nonuniform Pulse Transmission for Accurate Real-Time Moving Object Tracking. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2019)
Sho Iwazaki, Koichi Ichige
Extended Beamforming by Sum and Difference Composite Co-Array for Real-Valued Signals. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (7) (2019)
Sho Iwazaki, Koichi Ichige
DOA-based Weighted Spatial Filter Design for Sum and Difference Composite Co-Array. ICECS (2019)
Steven Wandale, Thomas Basikolo, Koichi Ichige
Super Nested Sparse Circular Array for High Resolution DOA Estimation. ISCAS (2019)
Shogo Nakamura, Sho Iwazaki, Koichi Ichige
Optimum 2D Sparse Array and its Interpolation via Nuclear Norm Minimization. ISCAS (2019)
Sho Iwazaki, Koichi Ichige
Underdetermined Direction of Arrival Estimation by Sum and Difference Composite Co-Array. ICECS (2018)
Takeo Kawashima, Koichi Ichige
Automatic Piano Music Transcription using Low Rank NMF and Convolutional Neural Network. ISPACS (2018)
Jun Ogata, Koichi Ichige
Fast Intra Mode Decision Method Based on Outliers of DCT Coefficients and Neighboring Block Information for H.265/HEVC. ISCAS (2018)
Yuji Araki, Koichi Ichige
Single Image Haze Removal Using Ambient Light Estimation and Region Segmentation. ISPACS (2018)
Thomas Basikolo, Koichi Ichige, Hiroyuki Arai
Nested Circular Array and Its Concentric Extension for Underdetermined Direction of Arrival Estimation. IEICE Trans. Commun. (4) (2018)
Thomas Basikolo, Koichi Ichige, Hiroyuki Arai
A note on CRLB formulation for underdetermined DOA estimation in circularly configured planar arrays. IEICE Electron. Express 15 (5) (2018)
Sho Iwazaki, Koichi Ichige
Extended beamforming by sum and difference composite co-array for radio surveillance. WIFS (2017)
Koichi Ichige, Yu Iwabuchi
Array Correlation Matrix Element Properties and Their Application to Low-Cost DOA Estimation. IEICE Trans. Commun. (8) (2016)
Koichi Ichige, Nobuya Arakawa, Osamu Shibata
Real-time moving object tracking using phase-difference compensation and nonuniform pulse transmission. ISCAS (2016)
Koichi Ichige, Naoki Yotsueda
Weighted shooting method for high-resolution DOA estimation based on sparse spectrum fitting. EUSIPCO (2016)
Koichi Ichige, Yu Iwabuchi
An efficient Direction-Of-Arrival estimation method for Uniform Rectangular Array based on array covariance matrix element properties. CAMSAP (2015)
Yuki Iizuka, Koichi Ichige
Multiple snapshot spatial smoothing with improved effective array aperture for high-resolution direction-of-arrival estimation. ICICS (2015)
Jun Ogata, Koichi Ichige
Non-iterative coding tree depth estimation for H.265/HEVC using neighboring block information. ICICS (2015)
Yuki Doi, Koichi Ichige, Hiroyuki Arai, Hiromi Matsuno, Masayuki Nakano
Antenna switching based on the relation between the relative location of array elements for high resolution 2-D DOA estimation. ISCCSP (2014)
Yuki Doi, Koichi Ichige, Hiroyuki Arai, Hiromi Matsuno, Masayuki Nakano
3-D array configuration using multiple regular tetrahedra for high-resolution 2-D DOA estimation. EUSIPCO (2014)
Yu Iwabuchi, Hanyang Li, Koichi Ichige
Direction-of-arrival estimation of coherent sources for ULA based on the relation between array covariance matrix elements. ISCCSP (2014)
Keita Yamada, Koichi Ichige
DOA estimation for low-cost array antenna system based on GROUSE and EM algorithms. APCCAS (2014)
Yu Iwabuchi, Koichi Ichige
Accurate and low-cost DOA estimation method using array covariance matrix elements. APCCAS (2014)
Yuki Doi, Hiroki Moriya, Koichi Ichige, Hiroyuki Arai, Takahiro Hayashi, Hiromi Matsuno, Masayuki Nakano
Low-cost antenna array via antenna switching for high resolution 2-D DOA estimation. SiPS (2013)
Hiroki Moriya, Yuki Doi, Koichi Ichige, Hiroyuki Arai, Takahiro Hayashi, Hiromi Matsuno, Masayuki Nakano
Cuboid array: A novel 3-D array configuration for high resolution 2-D DOA estimation. SiPS (2013)
Yuki Doi, Hiroki Moriya, Koichi Ichige, Hiroyuki Arai, Takahiro Hayashi, Hiromi Matsuno, Masayuki Nakano
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. (10) (2013)
Yuta Shikagawai, Koichi Ichige
High-resolution and low-cost direction-of-arrival estimation by 2q-Root-MUSIC method. SiPS (2013)
Hiroki Moriya, Koichi Ichige, Hiroyuki Arai, Takahiro Hayashi, Hiromi Matsuno, Masayuki Nakano
Improving Elevation Estimation Accuracy in DOA Estimation: How Planar Arrays Can Be Modified into 3-D Configuration. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (10) (2012)
Koichi Ichige, Hanyang Li, Hiroyuki Arai
SURE: SimUltaneous Root Extraction method for DOA estimation of coherent sources by ULA. SAM (2012)
Yosuke Takeuchi, Koichi Ichige, Koichi Miyamoto, Yoshio Ebine
Automated Microwave Filter Tuning Based on Successive Optimization of Phase and Amplitude Characteristics. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (2) (2011)
Minseok Kim, Takayuki Moteki, Koichi Ichige, Hiroyuki Arai
Efficient Heterodyne Digital Receiver with Direct RF-to-Digital Conversion for Software Defined Radio. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (4) (2009)
Koichi Ichige, Yoshihisa Ishikawa, Hiroyuki Arai
High resolution 2-D DOA estimation using second-order partial-differential of MUSIC spectrum. ISCAS (2008)
Koichi Ichige, Kazuhiko Saito, Hiroyuki Arai
High Resolution DOA Estimation Using Unwrapped Phase Information of MUSIC-Based Noise Subspace. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (8) (2008)
Kazuhiro Nakadai, Ryota Sumiya, Mikio Nakano, Koichi Ichige, Yasuo Hirose, Hiroshi Tsujino
The Design of Phoneme Grouping for Coarse Phoneme Recognition. IEA/AIE (2007)
Koichi Ichige, Yoshihisa Ishikawa, Hiroyuki Arai
High Resolution DOA Estimation Using Second-Order Differential of MUSIC Spectrum. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (3) (2007)
Koichi Ichige, Hideaki Munemasa, Hiroyuki Arai
An Efficient Signed-Power-of-Two Term Allocation for Filter Coefficients in Digital Communication System. IEICE Trans. Commun. (12) (2006)
Nozomi Zama, Koichi Ichige
Filter Effect on Low-IF Multichannel Receiver: How a Simple Filter Improves Digital Communication Quality. IEICE Trans. Commun. (12) (2006)
Koichi Ichige, Mitsuharu Imai, Hiroyuki Arai, Masayuki Nakano, Masafumi Hirono
Direction of Arrival Detection System for Radio Surveillance: Frequency Spectrum Analysis of CDMA and Jamming Waves. VTC Spring (2006)
Koichi Ichige, Noriaki Takabe, Hiroyuki Arai
An Explicit High-Resolution DOA Estimation Formula for Two Wave Sources. ICASSP (4) (2006)
Yoshihisa Ishikawa, Koichi Ichige, Hiroyuki Arai
Accurate Source Number Detection Using Pre-Estimated Signal Subspace. IEICE Trans. Commun. (12) (2006)
Minseok Kim, Aiko Kiyono, Koichi Ichige, Hiroyuki Arai
Experimental Study of Jitter Effect on Digital Downconversion Receiver with Undersampling Scheme. IEICE Trans. Inf. Syst. (7) (2005)
Naoya Matsumoto, Koichi Ichige, Hiroyuki Arai
Fixed-point digital processing of recursive least-square algorithm toward FPGA implementation of MMSE adaptive array antenna. ISSPA (2) (2003)
Eriko Matsuzaki, Koichi Ichige, Hiroyuki Arai
An automatic recognition algorithm of analogue modulated signals for disturbance rejection. ISSPA (1) (2003)
Koichi Ichige, Thierry Blu, Michael Unser
Interpolation of signals by generalized piecewise-linear multiple generators. ICASSP (6) (2003)
Atsushi Suzuki, Shintaro Muramatsu, Koichi Ichige, Hiroyuki Arai
A hardware implementation of LS-CMA adaptive array for high-speed mobile communication. PIMRC (2002)
Minseok Kim, Koichi Ichige, Hiroyuki Arai
Design of Jacobi EVD processor based on CORDIC for DOA estimation with MUSIC algorithm. PIMRC (2002)
Takeshi Asahi, Koichi Ichige, Rokuya Ishii
A Computationally Efficient Algorithm for Exponential B-Splines Based on Difference/IIR Filter Approach. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (6) (2002)
Koichi Ichige, Naohisa Otsuka, Rokuya Ishii
Properties of the frequency transformation matrices for IIR digital filters. Signal Process. 71 (3) (1998)
Koichi Ichige, Masaru Kamada
A simple discrete version of B-splines. Int. J. Syst. Sci. 29 (3) (1998)
Koichi Ichige, Naohisa Otsuka, Rokuya Ishii
An automatic design procedure of IIR digital filters from an analog low-pass filter. Signal Process. 57 (3) (1997)
Koichi Ichige, Masaru Kamada
An approximation for discrete B-splines in time domain. IEEE Signal Process. Lett. 4 (3) (1997)
Masaru Kamada, Takafumi Endoh, Koichi Ichige, Kazuo Toraichi
Quadratic spline interpolator. Int. J. Syst. Sci. 27 (10) (1996)
Koichi Ichige, Masaru Kamada
Discrete B-spline functions. EUSIPCO (1996)