Tetsuro IMAI


Performance Evaluation of Massive MIMO with Analog-Digital Hybrid Processing in a Real Microcell Environment
Ryochi KATAOKA Junpei MIYAZAWA Kentaro NISHIMORI Ngochao TRAN Tetsuro IMAI Hideo MAKINO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2015/09/01
Vol. J98-B  No. 9  pp. 967-978
Type of Manuscript:  Special Section PAPER (Special Section on Antenna and Propagation Which Keeps Drawing the Future by the Radio and the Relation System)
Category: 
Keyword: 
massive MIMOmicrocellcylindrical array antennamaximum ratio combiningZero forcingchannel sounder
 Summary | Full Text(in Japanese):PDF(2.5MB)

Evaluation and Proposal on Modified Model for 3GPP Based Indoor Penetration Loss Model
Keisuke KUSUMI Kentaro NISHIMORI Tetsuro IMAI Ngochao TRAN Koshiro KITAO 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2014/09/01
Vol. J97-B  No. 9  pp. 789-792
Type of Manuscript:  Special Section LETTER (Special Section on Antennas and Propagation Technologies Supporting the Foundations of Wireless Systems)
Category: 
Keyword: 
indoor penetration loss3GPP modelinterfering power evaluation
 Summary | Full Text(in Japanese):PDF(510.8KB)

Area Tuning Method for Low Received Level Areas on Upper Floors of Buildings Using Reflector Located Near Base Station Antenna in Mobile Communication Systems
Koshiro KITAO Tetsuro IMAI Kazumichi ISHIKAWA 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2013/09/01
Vol. J96-B  No. 9  pp. 971-980
Type of Manuscript:  Special Section PAPER (Special Issue on Antennas and Propagation Technologies Supporting Fusions of Wireless Systems)
Category: 
Keyword: 
mobile communication systemsreflectorphysical opticsbase station antenna
 Summary | Full Text(in Japanese):PDF(1.6MB)

Error Correction Method Employing Neural Network in Ray-Tracing Propagation Prediction
Atsushi KUNIKATA Tetsuro IMAI 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2012/12/01
Vol. J95-B  No. 12  pp. 1626-1633
Type of Manuscript:  PAPER
Category: 
Keyword: 
ray-tracing methoderror correctionneural network
 Summary | Full Text(in Japanese):PDF(1.3MB)

Performance Evaluation Method for Propagation Loss Prediction Model Based on Wavelet Analysis
Tetsuro IMAI 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2012/10/01
Vol. J95-B  No. 10  pp. 1335-1343
Type of Manuscript:  PAPER
Category: 
Keyword: 
wavelet analysispropagation loss predictionreception power variationmobile propagation
 Summary | Full Text(in Japanese):PDF(1.4MB)

Measurements of Propagation Characteristics on Outdoor, Indoor and Outdoor-Indoor Environment for Evaluation on Interference in Heterogeneous Networks
Kentaro NISHIMORI Sho KOMATSUBARA Koshiro KITAO Tetsuro IMAI 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2012/09/01
Vol. J95-B  No. 9  pp. 1159-1170
Type of Manuscript:  Special Section PAPER (Special Section on Antennas and Propagation Technologies for Progress in Wireless Systems)
Category: 
Keyword: 
heterogeneous networksfemtocellpropagation between indoor and outdoor environmentWINNERII modelSINR
 Summary | Full Text(in Japanese):PDF(2MB)

Development of Spatial Channel Emulator for MIMO OTA and Accuracy Evaluation
Yoshiki OKANO Tetsuro IMAI 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2010/09/01
Vol. J93-B  No. 9  pp. 1267-1275
Type of Manuscript:  Special Section PAPER (Special Issue on Antennas and Propagation Supporting Advanced Wireless System)
Category: 
Keyword: 
antenna correlationMIMOOTA measurementspatial channel emulator
 Summary | Full Text(in Japanese):PDF(1.7MB)

Effects of Shaping Vertical Radiation Pattern of Base Station Antenna on W-CDMA Downlink Capacity -- Evaluation Using Genetic Algorithm --
Junpei MIZUNO Tetsuro IMAI 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2010/01/01
Vol. J93-B  No. 1  pp. 69-79
Type of Manuscript:  PAPER
Category: 
Keyword: 
vertical radiation pattern shapingoptimizationgenetic algorithmW-CDMAsystem capacity
 Summary | Full Text(in Japanese):PDF(933.6KB)

Mobile Radio Propagation Simulation Based on Ray-Tracing Method
Tetsuro IMAI 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2009/09/01
Vol. J92-B  No. 9  pp. 1333-1347
Type of Manuscript:  Special Section PAPER (Special Issue on Simulation and Analysis Methods for Antennas and Propagation Technologies)
Category: 
Keyword: 
ray-tracing methodmobile radio propagation simulationpropagation prediction systemsystem performance
 Summary | Full Text(in Japanese):PDF(3.3MB)

Novel Ray-Tracing Acceleration Technique Employing Genetic Algorithm for Radio Propagation Prediction
Tetsuro IMAI 
Publication:   B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition)
Publication Date: 2006/04/01
Vol. J89-B  No. 4  pp. 560-575
Type of Manuscript:  PAPER
Category: 
Keyword: 
radio propagation predictionray-tracing methodgenetic algorithmray-tracing acceleration technique
 Summary | Full Text(in Japanese):PDF(3.2MB)