Search Results 1-20 of 1233

  • Emergency Warning System Integrating Proximity Services for Broadcasting Early Warnings to UEs Outside eNB Coverage  [in Japanese]

    六平 豊 , 中村 嘉隆 , 稲村 浩

    … ホップD2D通信システムを検討する.さらに,同報メッセージの拡散において,ETWSの配信エリアの構成とgeocastを活用した拡散経路最適化方式も検討する.本提案システムについて,ネットワークシミュレータを用いて震災時の環境を再現し,災害・耐性ネットワーク・システムとしての有効性を示す.Japanese mobile carriers are distributing early warning such as earthquake early warning, tsunami warning or disaster evacuation information to user …

    情報処理学会論文誌 60(2), 514-526, 2019-02-15

    IPSJ

  • An Application of 5G to Truck Platooning  [in Japanese]

    吉野 仁

    自動車技術 = Journal of Society of Automotive Engineers of Japan 73(2), 51-56, 2019-02

  • RF-Drone: Multi-tag System for RF-ID Enables Drone Tracking in GPS-denied Environments

    LU Xiang , CHEN Ziyang , WANG Lianpo , LI Ruidong , ZHAI Chao

    … <p>In resent years, providing location services for mobile targets in a closed environment has been a growing interest. … The passive RFID tags, no battery equipped, have an ultra-high resolution of millimeter level. …

    IEICE Transactions on Communications, 2019

    J-STAGE

  • Mode Selective Active Multimode Interferometer Laser Diode — Mode Selection Principle, and High Speed Modulation —

    HAMAMOTO Kiichi , JIANG Haisong

    … 1) lasing at a selected space mode, and 2) high modulation bandwidth. … Based on these, it is expected to enable high speed interconnection into future personal and mobile devices. … In this paper, we explain the mode selection, and the high speed modulation principles. …

    IEICE Transactions on Electronics E102.C(4), 364-370, 2019

    J-STAGE

  • Bandwidth-Efficient Blind Nonlinear Compensation of RF Receiver Employing Folded-Spectrum Sub-Nyquist Sampling Technique

    KIMURA Kan , YAMAO Yasushi

    … <p>Blind nonlinear compensation for RF receivers is an important research topic in 5G mobile communication, in which higher level modulation schemes are employed more often to achieve high capacity and ultra-broadband services. … Proposed technique achieves almost same compensation performance in EVM as the conventional compensation scheme, while reducing sampling speed of analog to digital convertor (ADC) to less than half the normal sampling frequency. …

    IEICE Transactions on Communications E102.B(3), 632-640, 2019

    J-STAGE

  • Fabrication and Evaluation of Integrated Photonic Array-Antenna System for RoF Based Remote Antenna Beam Forming

    HIRASAWA Takayoshi , AKIBA Shigeyuki , HIROKAWA Jiro , ANDO Makoto

    … Firstly, we described details of fabrication of an integrated photonic array-antenna (IPA), where a 60GHz patch antenna 4×2 array and high-speed photo-diodes were integrated into a substrate. … We evaluated RF transmission efficiency as an IPA system for Radio-over-Fiber (RoF)-based mobile front hall architecture with remote antenna beam forming capability. …

    IEICE Transactions on Electronics E102.C(3), 235-242, 2019

    J-STAGE

  • High Speed Mobility Experiments on Distributed MIMO Beamforming for 5G Radio Access in 28-GHz Band

    Kitayama Daisuke , Simonsson Arne , Ökvist Peter , Tateishi Kiichi , Kurita Daisuke , Harada Atsushi , Inomata Minoru , Imai Tetsuro , Kishiyama Yoshihisa , Murai Hideshi , Itoh Shoji

    … <p>This paper describes the results of outdoor mobility measurements and high-speed vehicle tests that clarify the 4-by-8 multiple-input multiple-output (MIMO) throughput performance when applying distributed MIMO with narrow antenna-beam tracking in a 28-GHz frequency band in the downlink of a 5G cellular radio access system. …

    IEICE Transactions on Communications, 2019

    J-STAGE

  • Design and prototype of mobile access point based on node arrangement  [in Japanese]

    古堅 智仁 , 矢守 恭子

    … Wireless networks represented by wireless LAN can be used everywhere, and users can utilize high-speed communication services anytime anywhere. … However, since the number of users of the wireless network has increased too rapidly, the communication quality has deteriorated. … Then, we describe prototype using autonomous mobile AP using Raspberry Pi. …

    朝日大学大学院経営学研究科紀要 (18), 13-18, 2018-03

    IR

  • Bandwidth-Efficient Blind Nonlinear Compensation of RF Receiver Employing Folded-Spectrum Sub-Nyquist Sampling Technique

    KIMURA Kan , YAMAO Yasushi

    … <p>Blind nonlinear compensation for RF receivers is an important research topic in 5G mobile communication, in which higher level modulation schemes are employed more often to achieve high capacity and ultra-broadband services. … Proposed technique achieves almost same compensation performance in EVM as the conventional compensation scheme, while reducing sampling speed of analog to digital convertor (ADC) to less than half the normal sampling frequency. …

    IEICE Transactions on Communications, 2018

    J-STAGE

  • Energy-Efficient Mobile Video Delivery Utilizing Moving Route Navigation and Video Playout Buffer Control

    KANAI Kenji , TAKENAKA Sakiko , KATTO Jiro , MURASE Tutomu

    … <p>Because mobile users demand a high quality and energy-friendly video delivery service that efficiently uses wireless resources, we introduce an energy-efficient video delivery system by applying moving route navigation and playout buffer control based on the mobile throughput history data. … The proposed system first determines the optimal travel route to achieve high-speed and energy-efficient communications. …

    IEICE Transactions on Communications E101.B(7), 1635-1644, 2018

    J-STAGE

  • Energy-efficient Mobile Video Delivery utilizing Moving Route Navigation and Video Playout Buffer Control

    Kanai Kenji , Takenaka Sakiko , Katto Jiro , Murase Tutomu

    … <p>Because mobile users demand a high quality and energyfriendly video delivery service that efficiently uses wireless resources, we introduce an energy-efficient video delivery system by applying moving route navigation and playout buffer control based on the mobile throughput history data. … The proposed system first determines the optimal travel route to achieve high-speed and energy-efficient communications. …

    IEICE Transactions on Communications, 2018

    J-STAGE

  • Research and Development of the Overhead-Less Ultra-High Efficiency Transmission scheme with the Aim of Next Generation 5G Wireless Communication Systems(Researches and Overseas Activities)--(Research Reports)  [in Japanese]

    平栗 健史 , 森野 善明

    … In recent years, advances in wireless local area network (WLAN) systems have led to large increases in the transmission speed. … The massive MIMO transmission has attracted attention as a new technology for wireless communication in 5th-generation mobile communication systems (5G). … We propose a novel access control scheme for multi-beam massive MIMO technology called overhead-less ultra-high efficiency transmission scheme. …

    日本工業大学研究報告 = Report of researches, Nippon Institute of Technology 47(2), 58-59, 2017-09

    IR

  • An Estimation of Human Moving Patterns for Call Detail Records  [in Japanese]

    小林 直 , 石塚 宏紀 , 南川 敦宣 , 村松 茂樹 , 小野 智弘

    … 582名の1カ月分のCDRsを用い,同時取得したGPSから推定した移動滞在状態を正解として精度検証を行った.評価結果から,提案手法は既存手法より高精度に状態推定が可能であることが明らかとなった.Researches on user behavior analysis have attracted huge attention recently due to the popularity of smart mobile devices and the availability of high-speed mobile communication

    情報処理学会論文誌データベース(TOD) 10(1), 13-23, 2017-03-22

    IPSJ

  • Experimental study of incoming waves separating adaptive array for ISDB-T mobile reception

    Tabata Takanobu , Fujimoto Mitoshi , Hori Satoshi , Wada Tomohisa , Asato Hirokazu

    … However, the communication quality could be seriously deteriorated at the high speed mobile reception (Ex. … Furthermore, most of the mobile reception system, 4 antennas are mounted on a vehicle (Front: 2 antennas, Rear: 2 antennas).</p><p>The authors proposed a new combing method (Incoming waves separating system by adaptive array antenna). …

    IEICE Communications Express 6(11), 627-632, 2017

    J-STAGE

  • Numerical modeling and analysis of glass fiber drawing process from large sized silica preform

    KIM Yong Ki , CHOI Jin Su , KWAK Ho Sang , KIM Kyoungjin

    … <p>As fiberoptics industries have been attempting to use a silica preform of larger diameter in order to reduce facility down time and increase optical fiber manufacturing productivity, this computational study investigates how the use of large sized preform in sized up draw furnace affects high speed glass fiber drawing process. … This study also shows that fine control of heating condition is necessary to maintain proper amount of draw tension in high precision glass fiber drawing.</p> …

    Journal of Thermal Science and Technology 12(2), JTST0030-JTST0030, 2017

    J-STAGE

  • Image Retrieval Framework Based on Dual Representation Descriptor

    YOSHIDA Yuichi , TOYOFUKU Tsuyoshi

    … The real value of the dual representation descriptor is aggregated into a VLAD in order to achieve high accuracy in the image retrieval, and the binary one is used to find correspondences in the <i>geometric verification</i> … on three datasets (holidays, ukbench and Stanford mobile visual search). … In addition, the experiments show that the image retrieval speed and storage requirements of our framework are as efficient as those of a framework that uses ORB.</p> …

    IEICE Transactions on Information and Systems E100.D(10), 2605-2613, 2017

    J-STAGE

  • Where, When, and How mmWave is Used in 5G and Beyond

    SAKAGUCHI Kei , KIM Junhyeong , KEUSGEN Wilhelm , WEILER Richard J. , TAKINAMI Koji , CECI Elena , SADRI Ali , XIAN Liang , MALTSEV Alexander , TRAN Gia Khanh , OGAWA Hiroaki , HAUSTEIN Thomas , MAHLER Kim , HEATH Jr. Robert W. , BARBAROSSA Sergio , STRINATI Emilio Calvanese , CLEMENTE Antonio , DESTINO Giuseppe , PÄRSSINEN Aarno , KIM Ilgyu , CHUNG Heesang

    … The second deployment example is a 60 GHz unlicensed indoor access system at the Tokyo-Narita airport, which is combined with Mobile Edge Computing (MEC) to enable ultra-high speed content download with low latency. … The last example is mmWave based Vehicular-to-Vehicular (V2V) and Vehicular-to-Everything (V2X) communications system, which enables automated driving by exchanging High Definition (HD) dynamic map information between cars and Roadside Units (RSUs). …

    IEICE Transactions on Electronics E100.C(10), 790-808, 2017

    J-STAGE

  • Radio Access Technologies for Broadband Mobile Communications

    SAWAHASHI Mamoru , HIGUCHI Kenichi

    … <p>This paper describes the broadband radio access techniques for Universal Mobile Terrestrial Systems (UMTS)/Wideband Code Division Multiple Access (W-CDMA), High-Speed Downlink Packet Access (HSDPA)/High-Speed Uplink Packet Access (HSUPA), Long Term Evolution (LTE), and LTE-Advanced. …

    IEICE Transactions on Communications E100.B(9), 1674-1687, 2017

    J-STAGE

  • Acquisition accuracy enhancement of high-speed storage interface signals

    Kim Hyunwoo , Song Yong Ho

    … <p>As storage interfaces have begun to employ high-speed signals and complex protocols, it has become increasingly difficult to ensure correct interactions between hosts and their storage. …

    IEICE Electronics Express 14(15), 20170634-20170634, 2017

    J-STAGE

  • Experimental Trial of 5G Super Wideband Wireless Systems Using Massive MIMO Beamforming and Beam Tracking Control in 28GHz Band

    OBARA Tatsunori , OKUYAMA Tatsuki , INOUE Yuki , AOKI Yuuichi , SUYAMA Satoshi , LEE Jaekon , OKUMURA Yukihiko

    … <p>This paper presents some results of an experimental trial for the 5th generation (5G) wireless communication systems using 28GHz band. … In order to tackle rapidly increasing traffic for 2020 and beyond, new radio access networks for the 5G mobile communication systems will introduce the use of higher frequency bands such as spectra higher than 10GHz to achieve higher capacity and super high bit rate transmission of several tens of Gbps. …

    IEICE Transactions on Communications E100.B(8), 1256-1268, 2017

    J-STAGE

Page Top