Committee |
Date Time |
Place |
Paper Title / Authors |
Abstract |
Paper # |
AP |
2016-05-20 15:40 |
Hyogo |
kobe Univ. |
Simulation Evaluation of Cell Quality by Beam Control on Active Array Antenna System Masayuki Nakano, Toru Kitayabu (KDDI R&D Labs.), Keisuke Sato, Ichiro Oshima (DKK) AP2016-30 |
Active array antenna system (AAS) is considered as the base station of the next generation. In order to reduce the inter... [more] |
AP2016-30 pp.77-82 |
AP |
2016-02-19 14:45 |
Fukushima |
Iwaki (Spa Resort Hawaiians) |
Propagation Characteristics Analysis of Orthogonal Polarized MIMO in Street Cell Model Daichi Matsuoka, Hiroyasu Ishikawa (Nihon Univ.), Toru Kitayabu, Masayuki Nakano (KDDI R&D Labs.) AP2015-202 |
In this research, analysis and comparison of computer simulation results and field experimental results for orthogonal p... [more] |
AP2015-202 pp.65-70 |
AP, RCS, WPT, SAT (Joint) |
2015-11-04 15:55 |
Okinawa |
Okinawa Prefectural Museum & Art Museum |
[Invited Lecture]
Path Loss Characteristics of Wideband Channels at 4.5 GHz Toru Kitayabu, Lin Ho-Yu, Masayuki Nakano (KDDI Labs.) AP2015-122 RCS2015-204 |
[more] |
AP2015-122 RCS2015-204 pp.71-76(AP), pp.85-90(RCS) |
MW, AP (Joint) |
2015-09-18 12:45 |
Tochigi |
Oyama National College of Tech. |
Field Evaluation of Cell Quality by Beam Control with Active Array Antenna System Masayuki Nakano, Toru Kitayabu (KDDI R&D Labs.), Shohei Natori, Keisuke Sato, Ichiro Oshima (DKK), Koji Miyata, Hisahiro Hayashi, Kazuhiro Gosui (KDDI) AP2015-90 |
Active array antenna system (AAS) is considered as the base station of the next generation. In order to reduce the inter... [more] |
AP2015-90 pp.59-64 |
AP, SANE (Joint) |
2015-08-27 14:35 |
Ibaraki |
Ibaragi Univ. Mito Campus |
Active Array Antenna System for Cellular Base Station Keisuke Sato, Shohei Natori, Ichiro Oshima (Denkikogyo), Toru Kitayabu, Masayuki Nakano (KDDI Lab.), Kouji Miyata, Hisahiro Hayashi, Kazuhiro Gosui (KDDI) AP2015-65 |
In 5th generation mobile networks, the introduction of active array antenna system (AAS) is considered for energy effici... [more] |
AP2015-65 pp.25-30 |
AP, RCS (Joint) |
2014-11-13 14:40 |
Yamagata |
Yamagata University, Yonezawa Campus |
Restoring Directivity of Active array Antenna System in the case of Antenna Element Failure Yukitaka Takahashi, Shohei Natori, Keisuke Sato, Ichiro Oshima (Denki Kogyo), Toru Kitayabu, Masayuki Nakano (KDDI R&D LABS) AP2014-143 |
Active array Antenna System (AAS) is expected for base station antenna of mobile communication system. AAS has the phase... [more] |
AP2014-143 pp.81-86 |
AP, RCS (Joint) |
2014-11-14 09:30 |
Yamagata |
Yamagata University, Yonezawa Campus |
Propagation Characteristics Analysis of Orthogonal Linearly Polarized MIMO in Street Cell Model Hirofumi Saito, Fumiya Ohba, Hiroyasu Ishikawa (Nihon Univ.), Toru Kitayabu, Masayuki Nakano (KDDI R&D Labs.) AP2014-146 |
Orthogonal linearly polarized antenna combined with MIMO technology has been researched and applied to mobile communicat... [more] |
AP2014-146 pp.97-102 |
AP, RCS (Joint) |
2014-11-14 09:55 |
Yamagata |
Yamagata University, Yonezawa Campus |
Propagation Analysis of Orthogonal Circularly Polarized MIMO in Street Cell Model Fumiya Ohba, Hirofumi Saito, Hiroyasu Ishikawa (Nihon Univ.), Toru Kitayabu, Masayuki Nakano (KDDI R&D Labs.) AP2014-147 |
Circular polarization is one of the polarization methods of radio waves that rotate the polarized wave proceeding with t... [more] |
AP2014-147 pp.103-108 |
AP, WPT (Joint) |
2014-10-16 12:55 |
Hokkaido |
Hokkaido University, Clark Memorial Student Center |
Frequency Characteristics of Path Loss in Street Cell Environment Toru Kitayabu, Hiromi Matsuno, Yoshiaki Amano, Masayuki Nakano, Akira Yamaguchi (KDDI Labs.) AP2014-116 |
In this paper, path losses are measured in 3.5 GHz, 870 MHz and 2115 MHz, respectively. The measurement results are comp... [more] |
AP2014-116 pp.43-47 |
AP, WPT (Joint) |
2014-10-17 13:55 |
Hokkaido |
Hokkaido University, Clark Memorial Student Center |
Experimental Investigation of Glass Loss for Indoor-to-outdoor Propagation Hiromi Matsuno, Toru Kitayabu, Yoshiaki Amano, Masayuki Nakano, Akira Yamaguchi (KDDI R&D Labs) AP2014-125 |
In this paper, the experimental evaluation of indoor-to-outdoor propagation in 3.5GHz, 2.115GHz, and 870MHz is employed.... [more] |
AP2014-125 pp.93-97 |
AP, WPT (Joint) |
2014-10-17 14:20 |
Hokkaido |
Hokkaido University, Clark Memorial Student Center |
Field Experiments on MIMO Antennas for Small Cell Base Stations in 3.5GHz Band Yoshiaki Amano, Toru Kitayabu, Hiromi Matsuno, Masayuki Nakano, Akira Yamaguchi (KDDI R&D) AP2014-126 |
Small cells have attracted a lot of attention to improve data throughput and frequency utilization efficiency for the 4t... [more] |
AP2014-126 pp.99-103 |
MICT, WBS |
2014-07-29 12:30 |
Osaka |
Osaka City Univ. (Umeda Satellite) |
[Poster Presentation]
Evaluation on Propagation Characteristics of Circularly Polarized MIMO in Street Cell Simple Model Fumiya Ohba, Hiroyasu Ishikawa (Nihon Univ.), Toru Kitayabu, Masayuki Nakano (KDDI R&D Labs.) WBS2014-17 MICT2014-31 |
Circular polarization is one of the polarization methods of radio waves that rotate the polarized wave proceeding with t... [more] |
WBS2014-17 MICT2014-31 pp.45-50 |
AP |
2014-03-11 13:35 |
Fukushima |
Koriyama City Rodo Fukushi Kaikan |
Evaluation on Propagation Characteristics of Circularly Polarized MIMO in Street Cell Model Fumiya Ohba, Hiroyasu Ishikawa (Nihon Univ.), Toru Kitayabu, Masayuki Nakano (KDDI R&D Labs.) AP2013-197 |
Circular polarization is one of the transmission techniques that rotates the polarized wave proceeding with time. The ci... [more] |
AP2013-197 pp.69-74 |
AP |
2014-02-07 10:00 |
Aichi |
Kojima Industries Corporation, Kojima Research Center |
[Invited Lecture]
Study of Measurement Method of Transmitter Characteristecs of Active Array Antenna for Cellular Base Station Yukitaka Takahashi, Shohei Natori, Keisuke Sato, Ichiro Oshima (DKK), Toru Kitayabu, Masayuki Nakano (KDDI Lab.) AP2013-177 |
Active array Antenna System (AAS) is expected for base station antenna of next generation mobile communication system (I... [more] |
AP2013-177 pp.63-68 |
AP |
2014-01-22 14:25 |
Kagoshima |
Hozan Hall (Kagoshima Prefectural Culture Center) |
Dual Frequency and Polarized Self-Diplexing Antenna Keisuke Sato, Ichiro Oshima (Denki Kogyo), Toru Kitayabu, Masayuki Nakano (KDDI Labs.) AP2013-141 |
Currently, multi-frequency band and dual-polarized antennas are often used as a base station antenna in mobile communica... [more] |
AP2013-141 pp.43-48 |
RCS |
2013-04-18 15:15 |
Okinawa |
Ishigaki City Hall |
JT-CoMP performance evaluation in different cell densities Takahiro Hayashi, Toru Kitayabu, Shinobu Nanba (KDDI R&D Labs) RCS2013-10 |
[more] |
RCS2013-10 pp.55-59 |
AP (2nd) |
2012-12-21 15:00 |
Okinawa |
KDDI Naha Building 6F |
Study of Measurement Method of Transmitter Characteristics of Active Array Antenna for Cellular Base Station Yukitaka Takahashi, Keisuke Sato, Ichiro Oshima (Denkikogyo), Yoshiaki Amano, Toru Kitayabu, Masayuki Nakano (KDDI Lab.) |
[more] |
|
RCS |
2011-06-23 11:10 |
Okinawa |
Ryukyu Univ. |
A Study of Cross-Carrier Precoding for Carrier Aggregation System Yuji Ikeda, Issei Kanno, Toru Kitayabu, Hiroyasu Ishikawa (KDDI Lab.) RCS2011-41 |
[more] |
RCS2011-41 pp.37-42 |
SR |
2010-07-30 13:20 |
Kyoto |
ATR (Kyoto) |
[Technology Exhibit]
Development of Muiti-mode SDR Terminal with Energy Efficient Radio Access Network Selection Algorithm Yuji Ikeda, Kosuke Yamazaki, Toru Kitayabu, Issei Kanno, Hiroyasu Ishikawa (KDDI Lab) SR2010-39 |
[more] |
SR2010-39 pp.133-136 |
RCS, SAT (Joint) |
2009-12-18 15:30 |
Tokyo |
Kikai-Shinko-Kaikan Bldg. |
A Study on Quantization Noise Reduction of Delta-Sigma Modulator with Nonuniform Quantization Mao Hagiwara (Chuo Univ.), Toru Kitayabu, Hiroyasu Ishikawa (KDDI R&D Labs.), Hiroshi Shirai (Chuo Univ.) RCS2009-197 |
In this paper, a novel delta-sigma modulator which has a non-uniform quantizer is proposed. A delta-sigma modulator is u... [more] |
RCS2009-197 pp.179-184 |