Tetsuro IMAI


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: 
propagation5Goutdoor-to-indoor path loss modelmillimeter wavehigh frequency bandsmicrocell environments
 Summary | Full Text:PDF(2.7MB)

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 modelcrowded environmenthuman body shadowingindoor environmentquasi-static environment
 Summary | Full Text:PDF(2.8MB)

5G Radio Access: Requirements, Concept and Experimental Trials
Takehiro NAKAMURA Anass BENJEBBOUR Yoshihisa KISHIYAMA Satoshi SUYAMA Tetsuro IMAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/08/01
Vol. E98-B  No. 8  pp. 1397-1406
Type of Manuscript:  INVITED PAPER (Special Section on 5G Radio Access Networks―Part I: Radio Access Technologies and System Design)
Category: 
Keyword: 
next generation mobile communications system5G4GLTELTE-advanced
 Summary | Full Text:PDF(3.6MB)

Interference Reduction Characteristics by Circular Array Based Massive MIMO in a Real Microcell Environment
Ryochi KATAOKA Kentaro NISHIMORI Ngochao TRAN Tetsuro IMAI Hideo MAKINO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/08/01
Vol. E98-B  No. 8  pp. 1447-1455
Type of Manuscript:  Special Section PAPER (Special Section on 5G Radio Access Networks―Part I: Radio Access Technologies and System Design)
Category: 
Keyword: 
massive MIMOcircular arraymicrocellmaximum ratio combiningzero forcingchannel sounder
 Summary | Full Text:PDF(4.8MB)

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 shadowinghigh frequency bandsKEUTD
 Summary | Full Text:PDF(2.6MB)

Path Loss Variation Characteristics at 26GHz Band in Street Microcell Environment
Motoharu SASAKI Wataru YAMADA Takatoshi SUGIYAMA Tetsuro IMAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/05/01
Vol. E98-B  No. 5  pp. 783-789
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Radio Propagation)
Category: 
Keyword: 
propagationmillimeter wavestreet micro-cellfading
 Summary | Full Text:PDF(2MB)

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 modelspatio - temporal channelvector channel sounder
 Summary | Full Text:PDF(2.3MB)

Polarization Dispersion Characteristics of Propagation Paths in Urban Mobile Communication Environment
Tetsuro IMAI Koshiro KITAO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/10/01
Vol. E96-B  No. 10  pp. 2380-2388
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: 
MIMOpolarizationpropagation modelmobile propagation
 Summary | Full Text:PDF(2.8MB)

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: 
MIMOchannel modeltime-variant channelcluster-based channel modelparticle filter
 Summary | Full Text:PDF(3MB)

Interference Rejection Characteristics by Adaptive Array at User Equipment Using Measured K-Factor in Heterogeneous Networks
Kentaro NISHIMORI Keisuke KUSUMI Misaki HORIO Koshiro KITAO Tetsuro IMAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/06/01
Vol. E96-B  No. 6  pp. 1256-1264
Type of Manuscript:  Special Section PAPER (Special Section on Heterogeneous Networks for Future Cellular Systems)
Category: 
Keyword: 
heterogeneous networksadaptive arrayuser equipmentK-factorzero forcing
 Summary | Full Text:PDF(1.9MB)

Development and Experimental Evaluation of Cyclostationarity-Based Signal Identification Equipment for Cognitive Radios
Hiroki HARADA Hiromasa FUJII Shunji MIURA Hidetoshi KAYAMA Yoshiki OKANO Tetsuro IMAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/04/01
Vol. E95-B  No. 4  pp. 1100-1108
Type of Manuscript:  Special Section PAPER (Special Section on Cognitive Radio and Heterogeneous Wireless Networks in Conjunction with Main Topics of CrownCom2011)
Category: 
Keyword: 
cognitive radiospectrum sharingcyclostationarity-based signal identificationtest bed experimentspatial channel emulator
 Summary | Full Text:PDF(2.3MB)

Evolution Trends of Wireless MIMO Channel Modeling towards IMT-Advanced
Chia-Chin CHONG Fujio WATANABE Koshiro KITAO Tetsuro IMAI Hiroshi INAMURA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/09/01
Vol. E92-B  No. 9  pp. 2773-2788
Type of Manuscript:  INVITED SURVEY PAPER
Category: 
Keyword: 
channel modelIMT-AdvancedMIMOmultipathspatial diversityspatial multiplexing
 Summary | Full Text:PDF(1.1MB)

Analysis of Incoming Wave Distribution in Vertical Plane in Urban Area and Evaluation of Base Station Antenna Effective Gain
Koshiro KITAO Tetsuro IMAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/06/01
Vol. E92-B  No. 6  pp. 2175-2181
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
mobile radiopower angle profileangle spreadmean angleantenna effective gain
 Summary | Full Text:PDF(1.3MB)

Analysis of Electromagnetic Wave Scattering by a Conducting Thin Plate and Image Coefficient for Ray Tracing Method
Kazunori UCHIDA Hiroshi MAEDA Tetsuro IMAI Teruya FUJII Masaharu HATA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1998/06/25
Vol. E81-C  No. 6  pp. 993-999
Type of Manuscript:  PAPER
Category: Electromagnetic Theory
Keyword: 
Wiener-Hopf techniquescatteringline sourceray tracing method
 Summary | Full Text:PDF(532.3KB)

Analysis of Plane Wave Scattering by a Conducting Thin Plate and a Criterion for Ray Tracing Method
Kazunori UCHIDA Tetsuro IMAI Teruya FUJII Masaharu HATA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1998/04/25
Vol. E81-C  No. 4  pp. 618-621
Type of Manuscript:  LETTER
Category: Electromagnetic Theory
Keyword: 
Wiener-Hopf techniquenear and far fieldsray tracing method
 Summary | Full Text:PDF(238.6KB)