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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| RCS, SR, SRW (Joint) |
2022-03-02 13:55 |
Online | Online | A Study on Cloud-Assisted Low-Speed Mobilities Using Post 5G Networks Tomofumi Hoshi, Ryoma Kondo, Yoshiki Okano, Yoshiaki Narusue, Hiroyuki Morikawa (The Univ. of Tokyo)  RCS2021-266 |
In order to realize mobility services that contribute to solving social and community issues in Japan, we are investigat... [more] | RCS2021-266 pp.80-84 |
| AP | 2012-01-18 13:20 |
Fukuoka | Kyushu Inst. of Tech. | Experimental Study on Spatio-Temporal Channel in Indoor Environments Koshiro Kitao, Tetsuro Imai, Kentaro Saito, Yoshiki Okano, Hiroki Harada, Shunji Miura (NTT DOCOMO) AP2011-152 |
This paper describes characteristics of direct and scattered waves which are extracted from the measurement channel data... [more] | AP2011-152 pp.37-42 |
| AP, SAT (Joint) |
2011-07-15 13:00 |
Nagano | Fac. Eng., Shinshu Univ. | The Modeling Methods of time varying MIMO channels using Particle Filter Kentaro Saito, Koshiro Kitao, Tetsuro Imai, Yoshiki Okano, Shunji Miura (DOCOMO) AP2011-41 |
Ray-based channel models parameterized from measured data such as 3GPP Spatial Channel Model has been widely used as the... [more] | AP2011-41 pp.81-86 |
| SR | 2011-01-27 13:25 |
Fukuoka | Kyushu Institute of Technology | Experimental Evaluation of Cyclostationarity-Based Multiple Signal Identification Method by using Spatial Channel Emulator Hiroki Harada, Hiromasa Fujii, Shunji Miura, Hidetoshi Kayama, Yoshiki Okano, Tetsuro Imai (NTT DOCOMO) SR2010-70 |
The problem with conventional cyclostationarity-based feature detection is that the detection probability of weak sign... [more] |
SR2010-70 pp.7-12 |
| AP, RCS (Joint) |
2010-11-12 09:55 |
Fukui | Fukui Univ. | The DoA estimation method using EM/SAGE algorithm and Extended MODE algorithms with array interpolation Kentaro Saito, Koshiro Kitao, Tetsuro Imai, Yoshiki Okano, Shunji Miura (NTT DOCOMO) AP2010-108 |
MIMO transmission technologies have been investigated and are expected to realize the wide-band and high-speed radio com... [more] | AP2010-108 pp.97-102 |
| AP | 2010-03-08 09:50 |
Saitama | Saitama University | The estimation of time-variant behavior of propagation parameters using the particle filter and modeling the dynamic MIMO channel Kentaro Saito, Koshiro Kitao, Yoshiki Okano, Tetsuro Imai, Shunji Miura (NTT DOCOMO) AP2009-206 |
[more] | AP2009-206 pp.7-12 |
| AP | 2010-02-18 15:00 |
Tokyo | Toshiba | Estimation accuracy using ray-tracing for spatio-temporal dynamic channel properties Koshiro Kitao, Kentaro Saito, Tetsuro Imai, Yoshiki Okano, Shunji Miura (NTT DOCOMO) AP2009-195 |
Dynamic control techniques such as rank adaptation are studied for LTE (Long Term Evolution) and IMT-Advanced which are ... [more] | AP2009-195 pp.65-70 |
| AP | 2010-02-19 15:25 |
Tokyo | Toshiba | Theoretical Analysis on Spatial Correlation Characteristics Based on Fourier Spectrum of Arrival Wave Distribution and Key Properties of Bessel Function Tetsuro Imai, Yoshiki Okano, Koshiro Kitao, Kentaro Saito, Shunji Miura (NTT DOCOMO) AP2009-202 |
In mobile communication system design, spatial correlation of received signals is an important metric for predicting the... [more] | AP2009-202 pp.107-112 |
| AP, SAT (Joint) |
2009-07-10 15:40 |
Hokkaido | Otaru city, Hokkaido | The resolution improvement of DoA estimation using SAGE algorithm and Extended Root-MUSIC algorithm with Array Interpolation Kentaro Saito, Koshiro Kitao, Tetsuro Imai, Junichiro Hagiwara, Yoshiki Okano (DOCOMO) AP2009-75 |
MIMO transmission technologies have been investigated and are expected to realize the wide-band and high-speed radio com... [more] | AP2009-75 pp.183-188 |
| AP | 2009-05-22 09:30 |
Kumamoto | Kumamoto Univ. | A Study on Construction of Spatial Channel Emulator for MIMO Performance Evaluation of Mobile Terminals Tetsuro Imai, Yoshiki Okano, Koshiro Kitao, Kentaro Saito, Junichiro Hagiwara (NTT DOCOMO) AP2009-25 |
At the present, techniques for evaluating MIMO performance of mobile terminals in laboratories are investigated. Spatial... [more] | AP2009-25 pp.81-86 |
| AP | 2009-05-22 09:55 |
Kumamoto | Kumamoto Univ. | Relation Between Angle Spread of Arriving Waves and Alignment of Scatterer antennas for Spatial Channel Emulator Yoshiki Okano, Tetsuro Imai, Koshiro Kitao, Kentaro Saito, Junichiro Hagiwara (NTT DOCOMO) AP2009-26 |
It is noted that the OTA (Over-The-Air) performance of MIMO mobile terminals employing multi-antennas must be evaluated ... [more] | AP2009-26 pp.87-92 |
| AP | 2009-05-22 10:20 |
Kumamoto | Kumamoto Univ. | A study on spatio-temporal dynamic channel properties based on channel sounder measurements Koshiro Kitao, Kentaro Saito, Yoshiki Okano, Tetsuro Imai, Junichiro Hagiwara (NTT DOCOMO) AP2009-27 |
Lately, a lot of channel models for MIMO system evaluation based on measurement data are studied. Moreover, dynamic prop... [more] | AP2009-27 pp.93-97 |
| AP | 2009-05-22 14:55 |
Kumamoto | Kumamoto Univ. | Over-the-air performance testing system for MIMO antennas employoing reverberation chamber Daisuke Kurita, Yoshiki Okano, Shin Nakamatsu, Takashi Okada (NTT DOCOMO) AP2009-34 |
MIMO (Multiple-Input-Multiple-Output) is ones of key techniques to improve throughput performance and therefore, the MIM... [more] | AP2009-34 pp.135-140 |
| AP | 2009-01-23 15:15 |
Fukuoka | Fukuoka University | A study on multi-antenna measurement system aimed at evaluation of angular dependency for transmission performance Yoshiki Okano, Daisuke Kurita, Shin Nakamatsu, Takashi Okada (docomo) AP2008-186 |
It is noted that OTA (Over-The-Air) performance of mobile terminals employing multi-antennas for a diversity and MIMO mu... [more] | AP2008-186 pp.209-214 |
| AP | 2009-01-23 15:50 |
Fukuoka | Fukuoka University | Study on multi-antenna measurement system using reverberation chamber Daisuke Kurita, Yoshiki Okano, Shin Nakamatsu, Takashi Okada (DOCOMO) AP2008-187 |
Receive diversity and MIMO (Multiple-Input-Multiple-Output) is ones of key techniques to improve throughput performance ... [more] | AP2008-187 pp.215-220 |
| AP | 2009-01-23 16:15 |
Fukuoka | Fukuoka University | Evaluation of mean effective gain for mobile terminal antennas considering practical usage situation and propagation properties Shin Nakamatsu, Daisuke Kurita, Yoshiki Okano, Takashi Okada (DOCOMO) AP2008-188 |
Effective gain of mobile terminal antenna depends on the practical usage situation of the mobile terminals by users and ... [more] | AP2008-188 pp.221-226 |
| AP | 2007-12-13 15:40 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Dependency of MIMO Channel Capacity on Power Azimuth Spectrum for Multi-band Multi-antenna Mounted on Handheld Device Yoshiki Okano, Keizo Cho (DoCoMo) AP2007-121 |
In this report, we investigate the dependency of the MIMO channel capacity on the power azimuth spectrum for the multi-b... [more] | AP2007-121 pp.35-40 |
| AP | 2007-09-06 11:35 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Dependency of MIMO Channel Capacity on Power Azimuth Spectrum for Monopole Array Antenna Mounted on Card-Type Terminal Yoshiki Okano, Keizo Cho (DoCoMo) AP2007-79 |
In this report, we investigate the dependency of the MIMO channel capacity on the power azimuth spectrum for the monopol... [more] | AP2007-79 pp.31-36 |
| AP | 2007-06-21 14:15 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Performance of Multiple Antennas Employing Quarter-wavelength Monopole Array for Card-type Terminal Yoshiki Okano, Keizo Cho (DoCoMo) AP2007-40 |
This paper presents the performance of monopole array antennas installed on wireless PC-card for 2 GHz band, which is ex... [more] | AP2007-40 pp.53-58 |
| AP | 2007-02-08 13:25 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Fundamental Study on 3-D Antenna Pattern Measurement with High-speed and High-Accuracy for Mobile Terminals Yoshiki Okano, Keizo Cho (DoCoMo) AP2006-137 |
The three dimensional (3-D) antenna pattern measurement have received a lot of attention recently, because CTIA and COST... [more] | AP2006-137 pp.7-12 |
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