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2020 – today
- 2025
[j32]Yuji Takahara, Yuto Kashiwagi
, Tomoki Tokuda, Junichiro Yoshimoto, Yuki Sakai, Ayumu Yamashita, Toshinori Yoshioka, Hidehiko Takahashi, Hiroto Mizuta, Kiyoto Kasai, Akira Kunimitsu, Naohiro Okada, Eri Itai, Hotaka Shinzato, Satoshi Yokoyama, Yoshikazu Masuda, Yuki Mitsuyama, Go Okada, Yasumasa Okamoto, Takashi Itahashi, Haruhisa Ohta, Ryu-ichiro Hashimoto, Kenichiro Harada, Hirotaka Yamagata, Toshio Matsubara, Koji Matsuo, Saori C. Tanaka, Hiroshi Imamizu, Koichi Ogawa, Sotaro Momosaki, Mitsuo Kawato, Okito Yamashita:
Comprehensive evaluation of pipelines for classification of psychiatric disorders using multi-site resting-state fMRI datasets. Neural Networks 187: 107335 (2025)- 2023
- [c21]Nobukuni Hamamoto, Koichi Ogawa, Hiroshi Ueda, Masako Furukawa, Motonori Nakamura, Kazutsuna Yamaji:
Analysis of Activity Logs of GakuNin LMS in the Use of the Information Security Course at Gunma University. KES 2023: 2932-2941 - 2021
- [j31]Keisuke Usui, Koichi Ogawa, Masami Goto, Yasuaki Sakano, Shinsuke Kyougoku, Hiroyuki Daida:
Quantitative evaluation of deep convolutional neural network-based image denoising for low-dose computed tomography. Vis. Comput. Ind. Biomed. Art 4(1): 21 (2021)
2010 – 2019
- 2018
- [j30]Hideki Kirino, Kazuhiro Honda, Kun Li, Koichi Ogawa:
A Waffle-Iron Ridge Guide with Combined Fast- and Slow-Wave Modes for Array Antenna Applications. IEICE Trans. Commun. 101-B(2): 349-356 (2018) - 2017
- [j29]Hideki Kirino, Kazuhiro Honda, Kun Li, Koichi Ogawa:
Wavelength Analysis Using Equivalent Circuits in a Fast and Slow Wave Waffle-Iron Ridge Guide. IEICE Trans. Commun. 100-B(2): 219-226 (2017) - [j28]Kazuhiro Honda, Takeshi Kitamura, Kun Li, Koichi Ogawa:
Regression-Based Channel Capacity for the Evaluation of 2×2 MIMO Antennas. IEICE Trans. Commun. 100-B(2): 323-335 (2017) - 2016
- [j27]Kazuhiro Honda, Kun Li, Koichi Ogawa:
Weighted-Polarization Wearable MIMO Antenna with Three Orthogonally Arranged Dipoles Based on RF Signal Processing. IEICE Trans. Commun. 99-B(1): 58-68 (2016) - [j26]Naoki Honma, Kentaro Murata, Hiroshi Sato, Koichi Ogawa, Yoshitaka Tsunekawa:
Channel Capacity Evaluation of MIMO Antenna Based on Eigenvalues of S-Parameter. IEICE Trans. Commun. 99-B(1): 95-103 (2016) - [j25]Kun Li, Kazuhiro Honda, Koichi Ogawa:
Three-Dimensional Over-The-Air Assessment for Vertically Arranged MIMO Array Antennas. IEICE Trans. Commun. 99-B(1): 167-176 (2016) - [c20]Kun Li, Keisuke Murata, Kazuhiro Honda, Koichi Ogawa:
Bit-error-rate OTA testing of BAN antennas based on shadowing-fading hybrid effects. ISMICT 2016: 1-5 - 2015
- [j24]Kun Li, Kazuhiro Honda, Koichi Ogawa:
Rice Channel Realization for BAN Over-The-Air Testing Using a Fading Emulator with an Arm-Swinging Dynamic Phantom. IEICE Trans. Commun. 98-B(4): 543-553 (2015) - [c19]Kun Li, Kazuhiro Honda, Koichi Ogawa:
Experiments of a polarization-controlled active antenna to enhance BAN on-body link in human dynamic channels. ISMICT 2015: 117-120 - 2014
- [j23]Tsutomu Sakata, Atsushi Yamamoto, Koichi Ogawa, Hiroshi Iwai, Jun-ichi Takada, Kei Sakaguchi:
A Spatial Fading Emulator for Evaluation of MIMO Antennas in a Cluster Environment. IEICE Trans. Commun. 97-B(10): 2127-2135 (2014) - [c18]Koichi Ogawa, Noriaki Yoshiura:
Network operational method by using software-defined networking for improvement of communication quality at disasters. APNOMS 2014: 1-4 - 2013
- [j22]Koichi Ogawa, Kazuhiro Honda:
Effects of Received Power Imbalance on the Diversity Gain of a Digital TV MRC Array Antenna. IEICE Trans. Commun. 96-B(3): 811-819 (2013) - [j21]Kazuhiro Honda, Kun Li, Koichi Ogawa:
Shadowing-Fading BER Characterization of a BAN Diversity Antenna Based on Statistical Measurements of the Human Walking Motion. IEICE Trans. Commun. 96-B(10): 2530-2541 (2013) - [c17]Kun Li, Kazuhiro Honda, Koichi Ogawa:
Shadowing-fading BER characterization of BAN antennas based on realistic walking models. ISMICT 2013: 183-187 - 2012
- [j20]Koichi Ogawa, Masahiko Sakata, Yu Li:
Adaptive Noise Reduction of Scintigrams with a Wavelet Transform. Int. J. Biomed. Imaging 2012: 130482:1-130482:7 (2012) - 2011
- [c16]Takuya Yamakawa, Koichi Ogawa, Hitoshi Iyatomi, Etsuo Kunieda:
Feasibility evaluation of a motion detection system with face images for stereotactic radiosurgery. EMBC 2011: 425-428 - [c15]Masaru Kiyama, Hitoshi Iyatomi, Koichi Ogawa:
Robust video-oculography for non-invasive autonomic nerve quantification. EMBC 2011: 494-496 - [c14]Naotake Yamamoto, Naganori Shirakata, Daisuke Kobayashi, Koichi Ogawa:
BAN Communication Quality Assessments Using an Arm-Waving Dynamic Phantom Replicating the Walking Motion of a Human. ICC 2011: 1-6 - 2010
- [j19]Gia Khanh Tran, Nguyen Dung Dao, Kei Sakaguchi, Kiyomichi Araki, Hiroshi Iwai, Tsutomu Sakata, Koichi Ogawa:
Performance Analysis of MIMO Schemes in Residential Home Environment via Wideband MIMO Propagation Measurement. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 93-A(4): 814-829 (2010)
2000 – 2009
- 2009
- [c13]Tsutomu Sakata, Atsushi Yamamoto, Koichi Ogawa, Jun-ichi Takada:
MIMO channel capacity measurement in the presence of spatial clusters using a fading emulator. PIMRC 2009: 97-101 - 2008
- [j18]Hitoshi Iyatomi, Hiroshi Oka, M. Emre Celebi, Masahiro Hashimoto, Masafumi Hagiwara, Masaru Tanaka, Koichi Ogawa:
An improved Internet-based melanoma screening system with dermatologist-like tumor area extraction algorithm. Comput. Medical Imaging Graph. 32(7): 566-579 (2008) - [j17]Toshifumi Nakatani, Koichi Ogawa:
A Low Distortion and Low Noise Differential Amplifier Suitable for 3G LTE Applications Using the Even- and Odd-Mode Impedance Differences of a Bias Circuit. IEICE Trans. Electron. 91-C(6): 844-853 (2008) - [j16]Hideki Kirino, Koichi Ogawa, Takeshi Ohno:
A Variable Phase Shifter Using a Movable Waffle Iron Metal Plate and Its Applications to Phased Array Antennas. IEICE Trans. Commun. 91-B(6): 1773-1782 (2008) - [j15]Atsushi Yamamoto, Koichi Ogawa, Tetsuo Horimatsu, Akihito Kato, Masayuki Fujise:
Path-Loss Prediction Models for Intervehicle Communication at 60 GHz. IEEE Trans. Veh. Technol. 57(1): 65-78 (2008) - 2007
- [j14]Toshifumi Nakatani, Koichi Ogawa:
IM3 Cancellation Method Using Current Feedback Suitable for a Multi-Stage RFIC Amplifier. IEICE Trans. Electron. 90-C(6): 1209-1221 (2007) - [j13]Atsushi Yamamoto, Koichi Ogawa, Hiroshi Shirai:
Empirical Investigation of the LOS Propagation Characteristics on an Undulating Road for Millimeter Wave Inter-Vehicle Communication. IEICE Trans. Electron. 90-C(9): 1807-1815 (2007) - [c12]Koichi Ogawa, Satoru Amari, Hiroshi Iwai, Atsushi Yamamoto:
Effects of Received Power Imbalance on the Channel Capacity of a Handset MIMO. PIMRC 2007: 1-5 - [c11]Atsushi Yamamoto, Toshiteru Hayashi, Koichi Ogawa, Kim Olesen, Jesper Ødum Nielsen, Naizheng Zheng, Gert Frølund Pedersen:
Outdoor Urban Propagation Experiment of a Handset MIMO Antenna with a Human Phantom Located in a Browsing Stance. VTC Fall 2007: 849-853 - 2006
- [j12]Hiroki Kawai, Koichi Ito, Masaharu Takahashi, Kazuyuki Saito, Takuya Ueda, Masayoshi Saito, Hisao Ito, Hisao Osada, Yoshio Koyanagi, Koichi Ogawa:
Simple Modeling of an Abdomen of Pregnant Women and Its Application to SAR Estimation. IEICE Trans. Commun. 89-B(12): 3401-3410 (2006) - [c10]Hitoshi Iyatomi, Hiroshi Oka, Masaru Tanaka, Koichi Ogawa:
Automatic Identification of Shot Body Region from Clinical Photographies. AIPR 2006: 11 - [c9]Gia Khanh Tran, Nguyen Dung Dao, Kei Sakaguchi, Kiyomichi Araki, Hiroshi Iwai, Tsutomu Sakata, Koichi Ogawa:
Performance Analysis of MIMO-OFDM Systems using Indoor Wideband MIMO Channel Measurement Data. VTC Spring 2006: 2868-2872 - 2005
- [j11]Shoichi Kajiwara, Atsushi Yamamoto, Koichi Ogawa, Akihiro Ozaki, Yoshio Koyanagi:
Attenuation Characteristics of the SAR in a COST244 Phantom with Different EM Source Locations and Sizes. IEICE Trans. Commun. 88-B(6): 2391-2400 (2005) - [j10]Nobuhiro Haruta, Koichi Ogawa:
Evaluation of iterative methods for aperture correction in SPECT. Syst. Comput. Jpn. 36(2): 23-32 (2005) - [c8]Hitoshi Iyatomi, Hiroshi Oka, Masahiro Hashimoto, Masaru Tanaka, Koichi Ogawa:
An Internet-based Melanoma Diagnostic System - Toward the Practical Application. CIBCB 2005: 443-446 - [c7]Nguyen Dung Dao, Hai-Yeow-Eugene Chua, Kei Sakaguchi, Kiyomichi Araki, Hiroshi Iwai, Tsutomu Sakata, Koichi Ogawa:
Measurements on Area Coverage of 5GHZ Band MIMO-OFDM System in Residential Home Environment. PIMRC 2005: 246-250 - 2003
- [j9]Koichi Ogawa, Jin Ohta:
Image reconstruction with a source space tree algorithm for Compton CT. Syst. Comput. Jpn. 34(11): 1-9 (2003) - 2002
- [j8]Koichi Ogawa, Masahiro Takahashi:
Selection of projection sets and order of calculation in ordered subsets expectation maximization method. Syst. Comput. Jpn. 33(13): 96-102 (2002) - [c6]Kazumitsu Kondo, Koichi Ogawa, K. Sakura:
Extraction of the vertebral foramen of the third lumbar vertebra with snakes. ICIP (2) 2002: 69-72 - 2001
- [j7]Koichi Ogawa, Toshimitsu Matsuyoshi:
An analysis of the performance of a handset diversity antenna influenced by head, hand, and shoulder effects at 900 MHz .I. Effective gain characteristics. IEEE Trans. Veh. Technol. 50(3): 830-844 (2001) - [j6]Koichi Ogawa, Toshimitsu Matsuyoshi, Kenji Monma:
An analysis of the performance of a handset diversity antenna influenced by head, hand, and shoulder effects at 900 MHz .II. Correlation characteristics. IEEE Trans. Veh. Technol. 50(3): 845-853 (2001) - [c5]Koichi Ogawa, Jin Ohta:
Accurate image reconstruction with the source space tree algorithm (SSTA) for Compton CT. ICIP (1) 2001: 698-701 - 2000
- [j5]Koichi Ogawa, Tomoki Uwano, Masao Takahashi:
A shoulder-mounted planar antenna for mobile radio applications. IEEE Trans. Veh. Technol. 49(3): 1041-1044 (2000) - [c4]Kotoko Morikawa, Koichi Ogawa:
Comparative Study on Statistical Image Reconstruction Combined with Modification of the Number of Projections. ICIP 2000: 479-482 - [c3]Yoshiyuki Nyui, Koichi Ogawa, Etsuo Kunieda:
Extraction of Arteriovenous Malformation with Factor Analysis. ICIP 2000: 621-624
1990 – 1999
- 1998
- [c2]Hiroshi Urabe, Koichi Ogawa:
Introduction of Ordered Subsets Algorithm to Maximum a posteriori Expectation Maximization Method. ICIP (3) 1998: 394-398 - 1991
- [j4]Atsuhisa Saito, Masato Nakajima, Koichi Ogawa:
Optimum contrast enhancement using fuzzy sets. Syst. Comput. Jpn. 22(11): 52-60 (1991) - 1990
- [c1]Koichi Ogawa, Atsuhisa Saito, Masato Nakajima, Yutaka Ando, Shozo Hashimoto:
Regional adaptive histogram equalization using fuzzy sets. Image Processing 1990
1980 – 1989
- 1987
- [j3]Ritsu Kusaba, Masato Nakajima, Koichi Ogawa, Shin'ichi Yuta, Tatsuru Morozumi:
Attenuation correction method for single-photon emission ct without any additional data collection. Syst. Comput. Jpn. 18(12): 64-71 (1987) - 1986
- [j2]Satoshi Iwata, Chiaki Yoshida, Masato Nakajima, Koichi Ogawa, Shin'ichi Yuta:
Correction method for collimator effect of ECT. Syst. Comput. Jpn. 17(4): 43-50 (1986) - [j1]Satoshi Iwata, Masato Nakajima, Shin'ichi Yuta, Koichi Ogawa:
Longitudinal ECT imaging using Y-ray camera. Syst. Comput. Jpn. 17(10): 11-19 (1986)
Coauthor Index
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