IEICE Trans

Yukihiko OKUMURA

28 GHz-Band Experimental Trial Using the Shinkansen in Ultra High-Mobility Environment for 5G Evolution Nobuhide NONAKA Kazushi MURAOKA Tatsuki OKUYAMA Satoshi SUYAMA Yukihiko OKUMURA Takahiro ASAI Yoshihiro MATSUMURA
Publication: Publication Date: 2021/09/01 Vol. E104-B No. 9 pp. 1000-1008 Type of Manuscript: Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G Evolution and Beyond) Category: Keyword: 5G evolution, massive MIMO, ultra high-mobility, high speed train, 28GHz band,
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Two-Step User Selection Algorithm in Multi-User Massive MIMO with Hybrid Beamforming for 5G Evolution Nobuhide NONAKA Satoshi SUYAMA Tatsuki OKUYAMA Kazushi MURAOKA Yukihiko OKUMURA
Publication: Publication Date: 2021/09/01 Vol. E104-B No. 9 pp. 1089-1096 Type of Manuscript: Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G Evolution and Beyond) Category: Keyword: 5G, massive-MIMO, multi-user MIMO, hybrid beamforming, low-complexity,
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Base Station Cooperation Technologies Using 28GHz-Band Digital Beamforming in High-Mobility Environments Tatsuki OKUYAMA Nobuhide NONAKA Satoshi SUYAMA Yukihiko OKUMURA Takahiro ASAI
Publication: Publication Date: 2021/09/01 Vol. E104-B No. 9 pp. 1009-1016 Type of Manuscript: Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G Evolution and Beyond) Category: Keyword: 5G evolution, millimeter-wave, high-mobility environment, digital BF, BS cooperation technology,
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Digital Beamforming Algorithm for 5G Low-SHF Band Massive MIMO Shohei YOSHIOKA Satoshi SUYAMA Tatsuki OKUYAMA Jun MASHINO Yukihiko OKUMURA
Publication: Publication Date: 2019/08/01 Vol. E102-B No. 8 pp. 1371-1381 Type of Manuscript: Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G and Beyond) Category: Keyword: 5G, low-SHF band, massive MIMO, multi-user MIMO, fully-digital beamforming, intersite coordination,
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Recent Activities of 5G Experimental Trials on Massive MIMO Technologies and 5G System Trials Toward New Services Creation Yukihiko OKUMURA Satoshi SUYAMA Jun MASHINO Kazushi MURAOKA
Publication: Publication Date: 2019/08/01 Vol. E102-B No. 8 pp. 1352-1362 Type of Manuscript: INVITED PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G and Beyond) Category: Keyword: fifth generation mobile communication system, radio access technology, higher frequency band, experimental trial, system trial,
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Performance Evaluation of Low Complexity Digital Beamforming Algorithms by Link-Level Simulations and Outdoor Experimental Trials for 5G Low-SHF-Band Massive MIMO Tatsuki OKUYAMA Satoshi SUYAMA Jun MASHINO Kazushi MURAOKA Kohei IZUI Kenichiro YAMAZAKI Yukihiko OKUMURA
Publication: Publication Date: 2019/08/01 Vol. E102-B No. 8 pp. 1382-1389 Type of Manuscript: Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G and Beyond) Category: Keyword: 5G, Massive MIMO, digital beamforming, outdoor experimental trials, low SHF bands,
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Experimental Study of Large-Scale Coordinated Multi-User MIMO for 5G Ultra High-Density Distributed Antenna Systems Takaharu KOBAYASHI Masafumi TSUTSUI Takashi DATEKI Hiroyuki SEKI Morihiko MINOWA Chiyoshi AKIYAMA Tatsuki OKUYAMA Jun MASHINO Satoshi SUYAMA Yukihiko OKUMURA
Publication: Publication Date: 2019/08/01 Vol. E102-B No. 8 pp. 1390-1400 Type of Manuscript: Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G and Beyond) Category: Keyword: 5G, cell densification, distributed antenna system, coordinated multi-user MIMO, field experiment,
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Performance Evaluation of Downlink Multi-User Massive MIMO with Configurable Active Antenna System and Inter Access Point Coordination in Low-SHF-Band Yi JIANG Kenichiro YAMAZAKI Toshihiro HAYATA Kohei IZUI Kanada NAKAYASU Toshifumi SATO Tatsuki OKUYAMA Jun MASHINO Satoshi SUYAMA Yukihiko OKUMURA
Publication: Publication Date: 2019/08/01 Vol. E102-B No. 8 pp. 1401-1410 Type of Manuscript: Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G and Beyond) Category: Keyword: 5G, Massive MIMO, low-SHF-band, MU-MIMO, beamforming, C-RAN, CB, CoMP,
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Field Trial of 28GHz Band 5G Downlink Massive MIMO Employing Beam Tracking in Railway Environment Yuta TAKAHASHI Tatsuki OKUYAMA Kazushi MURAOKA Satoshi SUYAMA Jun MASHINO Yukihiko OKUMURA
Publication: Publication Date: 2019/08/01 Vol. E102-B No. 8 pp. 1411-1417 Type of Manuscript: Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G and Beyond) Category: Keyword: 5G, high mobility, massive MIMO, beamforming, beam tracking,
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Real-Time Video Streaming Based on TFRC Using Communication Logging for 5G HetNet Takumi HIGUCHI Hideki SHINGU Noriyuki SHIMIZU Takeshi MIYAGOSHI Hiroaki ASANO Yoshifumi MORIHIRO Yukihiko OKUMURA
Publication: Publication Date: 2019/08/01 Vol. E102-B No. 8 pp. 1538-1546 Type of Manuscript: Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G and Beyond) Category: Keyword: 5G, HetNet, video streaming, TFRC,
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Radio Propagation Prediction Method Using Point Cloud Data Based on Hybrid of Ray-Tracing and Effective Roughness Model in Urban Environments Minoru INOMATA Tetsuro IMAI Koshiro KITAO Yukihiko OKUMURA Motoharu SASAKI Yasushi TAKATORI
Publication: Publication Date: 2019/01/01 Vol. E102-B No. 1 pp. 51-62 Type of Manuscript: PAPER Category: Antennas and Propagation Keyword: 5G mobile communication system, high frequency bands, radio propagation prediction method, point cloud data,
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Scattering Characteristics of the Human Body in 67-GHz Band Ngochao TRAN Tetsuro IMAI Koshiro KITAO Yukihiko OKUMURA Takehiro NAKAMURA Hiroshi TOKUDA Takao MIYAKE Robin WANG Zhu WEN Hajime KITANO Roger NICHOLS
Publication: Publication Date: 2018/06/01 Vol. E101-B No. 6 pp. 1434-1442 Type of Manuscript: PAPER Category: Antennas and Propagation Keyword: 5G, millimeter waves, NLOS scenarios, scattered waves by human bodies, radar cross section,
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5G Distributed Massive MIMO with Ultra-High Density Antenna Deployment in Low SHF Bands Tatsuki OKUYAMA Satoshi SUYAMA Jun MASHINO Yukihiko OKUMURA
Publication: Publication Date: 2017/10/01 Vol. E100-B No. 10 pp. 1921-1927 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: 5G, ultra-high density, distributed massive MIMO, virtual cell, flexible antenna deployment, low SHF bands,
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Throughput Improvement of Mobile Cooperative WLAN Systems with Identifying and Management of Starved APs/UEs for 5G Akiyoshi INOKI Hirantha ABEYSEKERA Munehiro MATSUI Kenichi KAWAMURA Takeo ICHIKAWA Yasushi TAKATORI Masato MIZOGUCHI Akira KISHIDA Yoshifumi MORIHIRO Takahiro ASAI Yukihiko OKUMURA
Publication: Publication Date: 2017/08/01 Vol. E100-B No. 8 pp. 1366-1376 Type of Manuscript: Special Section PAPER (Special Section on Radio Access Technologies for 5G Mobile Communications System) Category: Terrestrial Wireless Communication/Broadcasting Technologies Keyword: 5G, wireless LAN, throughput starvation, CSMA/CA,
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Experimental Trial of 5G Super Wideband Wireless Systems Using Massive MIMO Beamforming and Beam Tracking Control in 28GHz Band Tatsunori OBARA Tatsuki OKUYAMA Yuki INOUE Yuuichi AOKI Satoshi SUYAMA Jaekon LEE Yukihiko OKUMURA
Publication: Publication Date: 2017/08/01 Vol. E100-B No. 8 pp. 1256-1268 Type of Manuscript: Special Section PAPER (Special Section on Radio Access Technologies for 5G Mobile Communications System) Category: Wireless Communication Technologies Keyword: 5G, higher frequency bands, massive MIMO, beamforming, spatial multiplexing, beam tracking,
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Field Experimental Evaluation on 5G Millimeter Wave Radio Access for Mobile Communications Yuki INOUE Shohei YOSHIOKA Yoshihisa KISHIYAMA Satoshi SUYAMA Yukihiko OKUMURA James KEPLER Mark CUDAK
Publication: Publication Date: 2017/08/01 Vol. E100-B No. 8 pp. 1269-1276 Type of Manuscript: Special Section PAPER (Special Section on Radio Access Technologies for 5G Mobile Communications System) Category: Wireless Communication Technologies Keyword: 5G, millimeter wave, beam tracking, street canyon, shopping mall, field experiment,
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Improving Accuracy of Ray-Tracing Prediction in Non Line-of-Sight (NLOS) Urban Street Cell Environment beyond 6GHz Nobutaka OMAKI Tetsuro IMAI Koshiro KITAO Yukihiko OKUMURA
Publication: Publication Date: 2017/04/01 Vol. E100-B No. 4 pp. 566-574 Type of Manuscript: PAPER Category: Antennas and Propagation Keyword: ray-tracing, 5G wireless network system, microcellular environment, SHF, EHF,
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Path Loss Model for Outdoor-to-Indoor Corridor Up to 40GHz Band in Microcell Environments Minoru INOMATA Motoharu SASAKI Wataru YAMADA Takeshi ONIZAWA Masashi NAKATSUGAWA Nobutaka OMAKI Koshiro KITAO Tetsuro IMAI Yukihiko OKUMURA
Publication: Publication Date: 2017/02/01 Vol. E100-B No. 2 pp. 242-251 Type of Manuscript: Special Section PAPER (Special Section on Antenna and Propagation Technologies Contributing to Realization of Next Generation Wireless Systems) Category: Keyword: propagation, 5G, outdoor-to-indoor path loss model, millimeter wave, high frequency bands, microcell environments,
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Cluster Power Variation Characteristics for 3GHz-Band MIMO Communication System in a Crowded Indoor Environment Kentaro SAITO Tetsuro IMAI Koshiro KITAO Yukihiko OKUMURA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2016/05/01 Vol. E99-B No. 5 pp. 1131-1142 Type of Manuscript: PAPER Category: Antennas and Propagation Keyword: MIMO channel model, crowded environment, human body shadowing, indoor environment, quasi-static environment,
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Joint Processing of Analog Fixed Beamforming and CSI-Based Precoding for Super High Bit Rate Massive MIMO Transmission Using Higher Frequency Bands Tatsunori OBARA Satoshi SUYAMA Jiyun SHEN Yukihiko OKUMURA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2015/08/01 Vol. E98-B No. 8 pp. 1474-1481 Type of Manuscript: Special Section PAPER (Special Section on 5G Radio Access Networks―Part I: Radio Access Technologies and System Design) Category: Keyword: 5G, higher frequency bands, Massive MIMO, analog fixed beamforming, CSI-based precoding,
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Model for Estimating Effects of Human Body Shadowing in High Frequency Bands Ngochao TRAN Tetsuro IMAI Yukihiko OKUMURA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2015/05/01 Vol. E98-B No. 5 pp. 773-782 Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Radio Propagation) Category: Keyword: human body shadowing, high frequency bands, KE, UTD,
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Experimental Study on Ray Based Spatio-Temporal Channel Characteristics in Indoor Environment Koshiro KITAO Tetsuro IMAI Kentaro SAITO Yukihiko OKUMURA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2015/05/01 Vol. E98-B No. 5 pp. 798-805 Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Radio Propagation) Category: Keyword: indoor channel model, spatio - temporal channel, vector channel sounder,
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Dynamic Channel Modeling Using Particle Filtering for Wireless MIMO Systems in Urban Environment Kentaro SAITO Koshiro KITAO Tetsuro IMAI Yukihiko OKUMURA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2013/10/01 Vol. E96-B No. 10 pp. 2372-2379 Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2012) Category: Radio Propagation Keyword: MIMO, channel model, time-variant channel, cluster-based channel model, particle filter,
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Investigation of Inter-Cell Interference Coordination Applying Transmission Power Reduction in Heterogeneous Networks for LTE-Advanced Downlink Akihito MORIMOTO Nobuhiko MIKI Yukihiko OKUMURA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2013/06/01 Vol. E96-B No. 6 pp. 1327-1337 Type of Manuscript: Special Section PAPER (Special Section on Heterogeneous Networks for Future Cellular Systems) Category: Keyword: LTE-Advanced, heterogeneous network, inter-cell interference coordination, cell range expansion, transmission power reduction,
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Performance Evaluation of Interference Rejection Combining Receiver in Heterogeneous Networks for LTE-Advanced Downlink Yusuke OHWATARI Akihito MORIMOTO Nobuhiko MIKI Yukihiko OKUMURA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2013/06/01 Vol. E96-B No. 6 pp. 1265-1276 Type of Manuscript: Special Section PAPER (Special Section on Heterogeneous Networks for Future Cellular Systems) Category: Keyword: LTE-Advanced, heterogeneous network, interference rejection combining, inter-cell interference,
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Investigation on Transmission Power Control Suitable for Heterogeneous Network Employing Cell Range Expansion in LTE-Advanced Uplink Akihito MORIMOTO Nobuhiko MIKI Hiroyuki ISHII Daisuke NISHIKAWA Yukihiko OKUMURA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2013/04/01 Vol. E96-B No. 4 pp. 1051-1060 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: LTE-advanced, heterogeneous network, transmission power control, cell range expansion,
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Link Performance Modeling of Interference Rejection Combining Receiver in System Level Evaluation for LTE-Advanced Downlink Yousuke SANO Yusuke OHWATARI Nobuhiko MIKI Akihito MORIMOTO Yukihiko OKUMURA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2012/12/01 Vol. E95-B No. 12 pp. 3739-3751 Type of Manuscript: Special Section PAPER (Special Section on Coding and Coding Theory-Based Signal Processing for Wireless Communications) Category: Keyword: LTE-Advanced, interference rejection combining, inter-cell interference, system level simulation, link performance modeling, turbo equalizer,
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Impact on Inter-Cell Interference of Reference Signal for Interference Rejection Combining Receiver in LTE-Advanced Downlink Yousuke SANO Yusuke OHWATARI Nobuhiko MIKI Yuta SAGAE Yukihiko OKUMURA Yasutaka OGAWA Takeo OHGANE Toshihiko NISHIMURA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2012/12/01 Vol. E95-B No. 12 pp. 3728-3738 Type of Manuscript: Special Section PAPER (Special Section on Coding and Coding Theory-Based Signal Processing for Wireless Communications) Category: Keyword: LTE-Advanced, interference rejection combining, inter-cell interference, reference signal, turbo equalizer,
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Performance Investigation on Cell Selection Schemes Associated with Downlink Inter-Cell Interference Coordination in Heterogeneous Networks for LTE-Advanced Yuya SAITO Jaturong SANGIAMWONG Nobuhiko MIKI Satoshi NAGATA Tetsushi ABE Yukihiko OKUMURA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2011/12/01 Vol. E94-B No. 12 pp. 3304-3311 Type of Manuscript: Special Section PAPER (Special Section on Cooperative Communications for Cellular Networks) Category: Keyword: LTE-advanced, heterogeneous network, cell selection, reference signal received power, reference signal received quality,
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Investigation on Data Signal Muting to Improve Channel Estimation Accuracy in Downlink Coordinated Multiple-Point Transmission in LTE-Advanced Yusuke OHWATARI Nobuhiko MIKI Tetsushi ABE Satoshi NAGATA Yukihiko OKUMURA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2011/12/01 Vol. E94-B No. 12 pp. 3321-3334 Type of Manuscript: Special Section PAPER (Special Section on Cooperative Communications for Cellular Networks) Category: Keyword: coordinated multipoint transmission/reception, data signal muting, LTE-Advanced,
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1. 92 Mbps Data Transmission Experiments over a Coherent W-CDMA Radio Link Koichi OKAWA Yukihiko OKUMURA Mamoru SAWAHASHI Fumiyuki ADACHI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1998/07/25 Vol. E81-B No. 7 pp. 1330-1336 Type of Manuscript: Special Section PAPER (Special Issue on Third Generation Land Mobile Communication Systems) Category: Keyword: wideband CDMA, mobile radio, orthogonal multicode transmission,
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Variable-Rate Data Transmission with Blind Rate Detection for Coherent DS-CDMA Mobile Radio Yukihiko OKUMURA Fumiyuki ADACHI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1998/07/25 Vol. E81-B No. 7 pp. 1365-1373 Type of Manuscript: Special Section PAPER (Special Issue on Third Generation Land Mobile Communication Systems) Category: Keyword: DS-CDMA, variable-rate transmission, blind rate detection,
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Further Results on Field Experiments of Coherent Wideband DS-CDMA Mobile Radio Tomohiro DOHI Yukihiko OKUMURA Fumiyuki ADACHI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1998/06/25 Vol. E81-B No. 6 pp. 1239-1247 Type of Manuscript: PAPER Category: Mobile Communication Keyword: DS-CDMA, mobile radio, reverse link, transmit power control, antenna diversity, Rake combining,
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Experiments on Coherent Multicode DS-CDMA Tomohiro DOHI Yukihiko OKUMURA Akihiro HIGASHI Koji OHNO Fumiyuki ADACHI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1996/09/25 Vol. E79-B No. 9 pp. 1326-1332 Type of Manuscript: Special Section PAPER (Special Issue on Personal Communications) Category: CDMA and multiple access technologies Keyword: DS-CDMA, pilot symbol-aided coherent RAKE, interference power measurement based power control, orthogonal multicode transmission, test-bed, field test,
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Coherent Multicode DS-CDMA Mobile Radio Access Fumyuki ADACHI Koji OHNO Akihiro HIGASHI Tomohiro DOHI Yukihiko OKUMURA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1996/09/25 Vol. E79-B No. 9 pp. 1316-1325 Type of Manuscript: Special Section PAPER (Special Issue on Personal Communications) Category: CDMA and multiple access technologies Keyword: DS-CDMA, mobile raido access, cellular system,
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