Search Results 1-20 of 46

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  • Optimized Power Allocation Scheme for Distributed Antenna Systems with D2D Communication

    LI Xingquan , HE Chunlong , ZHANG Jihong

    … <p>In this paper, we investigate different power allocation optimization problems with interferences for distributed antenna systems (DAS) with and without D2D communication, respectively. … The first objective problem is maximizing spectral efficiency (SE) of the DAS with D2D communication under the constraints of the minimum SE requirements of user equipment (UE) and D2D pair, maximum transmit power of each remote access unit (RAU) and maximum transmit power of D2D transmitter. …

    IEICE Transactions on Communications E102.B(5), 1061-1068, 2019

    J-STAGE 

  • Orientation Recognition among Proximate Terminals for Ad Hoc Co-located Cooperative Work Involving Information Sharing  [in Japanese]

    塩見 和則 , 高田 秀志

    スマートフォンやタブレット端末を持ち寄って行う対面協調作業では,端末内の文書ファイルや検索をして得たWebページをその場で相手と共有したくなるような場面がある.端末のタッチパネル上で共有相手の方向へフリック操作などのジェスチャを行うことによって情報共有を行う方法は,直感的であり有用であるが,ジェスチャが行われた方向にどの端末が存在するのかを認識できる必要がある.本論文では,前触れなく発生するアドホ …

    情報処理学会論文誌 58(1), 143-152, 2017-01-15

    IPSJ 

  • Activation of a Co-located Meeting by Visualizing Conversation and Facilitating Participant's Behavior

    Adachi Hiroyuki , Myojin Seiko , Shimada Nobutaka

    … <p>Although there are a lot of opportunities to have a multi-party conversation such as decisionmaking meeting and brainstorming, we do not always have a good communication. …

    Transactions of the Institute of Systems, Control and Information Engineers 30(11), 427-438, 2017

    J-STAGE 

  • Hardware Oriented Low-Complexity Intra Coding Algorithm for SHVC

    KATAYAMA Takafumi , SONG Tian , SHI Wen , FUJITA Gen , JIANG Xiantao , SHIMAMOTO Takashi

    … Secondly, the redundant calculation of R-D optimization is reduced by adaptively using the information of the neighboring coding units and the co-located units in the base layer. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E100.A(12), 2936-2947, 2017

    J-STAGE 

  • B-1-103 Influence of Element Shape of FSR on Radiation Pattern of Co-located Antenna in Multi-band Reflector Backed Dipole Antenna Using FSR  [in Japanese]

    Tanizawa Yusuke , Cho Keizo , So Hideya , Ando Atsuya

    Proceedings of the Society Conference of IEICE 2015年_通信(1), 103, 2015-08-25

  • A Performance Evaluation of Beam Resource Utilization for Cellular Communication Systems  [in Japanese]

    SUZUKI Haruka , FUKUI Noriyuki , TAKE Keijiro , OKAMURA Atsushi

    次世代移動通信システムでは高速大容量通信を実現するため,スモールセル基地局が活用され,既存の低周波数帯マクロセルと高周波数帯スモールセルとが重畳する構成となることが予想される.現在のスモールセル基地局は主にオムニアンテナの利用が想定されているが,高周波数帯使用時の課題である電波伝搬損失の増大の解決を目的として,ビームフォーミング技術を実現可能なアレーアンテナの利用が考えられている.スモールセル基地 …

    Technical report of IEICE. RCS 114(490), 285-290, 2015-03-04

  • Investigation of Polarization Defciencies in SIMO Systems in Random-LOS Propagation Channels

    Aidin Razavi , Andres Alayon Glazunov , Per-Simon Kildal , Jian Yang

    IEICE Proceeding Series (37), S2.8.2, 2015

    DOI 

  • HoVerTable: Combining Dual-sided Vertical Mid-air Images with a Horizontal Tabletop Display  [in Japanese]

    Kim Hanyuool , Yamamoto Hiroki , Koizumi Naoya , Maekawa Satoshi , Naemura Takeshi

    … <p>Tabletop displays serve as shared displays and co-located workspaces for multiple people. … People often place physical objects such as mockup models on the table as an intuitive communication tool for tabletop displays. …

    The Transactions of Human Interface Society 17(3), 275-286, 2015

    J-STAGE 

  • HoVerTable: Combining Dual-sided Vertical Mid-air Images with a Horizontal Tabletop Display

    Kim Hanyuool , Yamamoto Hiroki , Koizumi Naoya , Maekawa Satoshi , Naemura Takeshi

    … Tabletop displays serve as shared displays and co-located workspaces for multiple people. … People often place physical objects such as mockup models on the table as an intuitive communication tool for tabletop displays. …

    Information and Media Technologies 10(4), 509-520, 2015

    J-STAGE 

  • Poster Presentation : Optimum Number of Transmit Antennas for STTD in MC-CDMA Distributed Antenna Network (Smart Radio)

    MORI Yumeto , INOSHITA Shohei , MIYAZAKI Hiroyuki , ADACHI Fumiyuki

    … Many transmit antennas are spatially distributed in DAN while they are co-located at the same base station in CAN. …

    IEICE technical report. SR, Smart radio 114(284), 15-20, 2014-10-30

  • B-1-101 Influence of Co-Located Parasitic Element Arrangement on Bandwidth Improvement of MSA  [in Japanese]

    Ikabata Munenori , Cho Keizo

    Proceedings of the Society Conference of IEICE 2014年_通信(1), 101, 2014-09-09

  • Enhancing Gaming Experience System Using See-Through Head Mounted Display and Posture Detection of Users  [in Japanese]

    KAJIYAMA HAYATO , INOUE AKIFUMI , HOSHI TOHRU

    本論文ではオフラインのコンソールゲームをするユーザに透過型ヘッドマウントディスプレイ(HMD)を装着してもらい,ゲームエクスペリエンスを拡張するシステムを提案する.本システムでは,ユーザ同士で共有する映像を共有画面に表示し,個々のユーザに対してのみ表示する映像を透過型HMD上に表示する.共有画面や共有画面周辺の実空間と,透過型HMDに表示した映像を重畳しつつゲームをすることで,複数人でのゲームプレ …

    IEICE technical report. MoNA, Mobile network and applications 113(495), 31-37, 2014-03-14

  • HARQ Throughput of Single-carrier MIMO Communication with Adaptive Multiplexing Order  [in Japanese]

    NAGAOKA Ryo , KUMAGAI Shinya , ADACHI Fumiyuki

    複数の送受信アンテナを用いるmultiple-input multiple-output(MIMO)通信は,空間多重を行うことで最大伝送レートの向上,空間ダイバーシチを行うことで受信信号対雑音電力比(SNR)の向上が可能となる.しかしながら基地局にアンテナが集中配置されている従来のセルラネットワーク(CAN)では,自セルにおける周波数選択性フェージングや伝搬損失,シャドウイング損失に加え,同一周波 …

    Technical report of IEICE. RCS 113(456), 463-468, 2014-03-03

  • A Hypothesis Testing Framework For Elevation Beamforming

    SOUIHLI Oussama , HATAKAWA Yasuyuki , KONISHI Satoshi

    … If two co-located receivers are sufficiently spaced in elevation, 3D BF allows a base station (BS) to simultaneously serve them by focusing dedicated narrow beams on each receiver's vertical position. …

    Technical report of IEICE. RCS 113(386), 65-70, 2014-01-23

  • A Hypothesis Testing Framework For Elevation Beamforming

    SOUIHLI Oussama , HATAKAWA Yasuyuki , KONISHI Satoshi

    … If two co-located receivers are sufficiently spaced in elevation, 3D BF allows a base station (BS) to simultaneously serve them by focusing dedicated narrow beams on each receiver's vertical position. …

    IEICE technical report. Signal processing 113(385), 65-70, 2014-01-16

  • Increasing Willingness to Communicate in Co-located Presentation Meetings using Augmented Reality

    Almeida Igor de Souza , Yamamoto Goshiro , Taketomi Takafumi , Miyazaki Jun , Kato Hirokazu

    … In this paper we present a web-based Augmented Reality (AR) meeting support system aiming at improving communication in a co-located (face-to-face) meeting. …

    Transactions of the Virtual Reality Society of Japan 19(1), 55-67, 2014

    J-STAGE 

  • Uplink Capacity of DS-CDMA Distributed Antenna Network  [in Japanese]

    INOSHITA Shohei , MIYAZAKI Hiroyuki , ADACHI Fumiyuki

    複数アンテナを無線セル内に分散配置する分散アンテナネットワーク(DAN)では,伝搬損失,シャドウィング損失および周波数選択性フェージングの影響を同時に低減でき,無線セル全域で優れた伝送品質を実現できる.ところで,マルチアクセス(MA)には直交MAと非直交MAとがある.直交MAとして知られている時間分割マルチアクセス(TDMA)や周波数分割マルチアクセス(FDMA)を用いる場合,チャネル割り当てが複 …

    Technical report of IEICE. RCS 113(194), 1-6, 2013-08-29

  • HARQ Throughput of Adaptive Single-carrier MIMO Transmission with Joint Tx/Rx Filtering in Distributed Antenna Network  [in Japanese]

    KUMAGAI Shinya , OBARA Tatsunori , YAMAMOTO Tetsuya , ADACHI Fumiyuki

    アンテナが無線セル中央の基地局に集中配置されている従来のセルラネットワーク(CN)では,セル端に近づくに連れて受信信号電力が低下するため,セル端付近のユーザのスループットが極端に低下してしまう.多数のアンテナを無線セル内に分散配置する分散アンテナネットワーク(DAN)はこの問題を解決できる.DANでは,移動端末の近傍に高確率でアンテナが存在するため,セル全域で高い受信信号電力を達成できる.したがっ …

    Technical report of IEICE. RCS 113(8), 81-86, 2013-04-18

  • High Port Isolation Co-Located Patch Antenna

    W. W. Li , B. Zhang , Y. H. Liu , B. Q. You

    IEICE Proceeding Series (54), FP-P-26, 2013

    DOI 

  • Encoder-Unconstrained User Interactive Partial Decoding Scheme

    LIU Chen , JIN Xin , ZHANG Tianruo , GOTO Satoshi

    … The decoded partial area (DPA) adaptation, the reference block relocation (RBR) and co-located temporal Intra prediction (CTIP) methods are proposed to improve the visual quality for the DPA with low complexity. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 95(8), 1288-1296, 2012-08-01

    J-STAGE  References (11)

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