Search Results:　 1-20 of 272

1

Characterization of DBF/channelizer with Deployable Reflector for Satellite/Terrestrial Integrated Mobile Communication System (Satellite Telecommunications)

Fujino Yoshiyuki , Tsuji Hiroyuki , Orikasa Teruaki 他

電子情報通信学会技術研究報告 : 信学技報 112(255), 95-99, 2012-10-24
2

Research and Development of Satellite Terrestrial Integrated Mobile Communication System as a Disaster Countermeasure [in Japanese]

藤野義之

電子情報通信学会技術研究報告 : 信学技報 112(192), 67-72, 2012-08-30
3

Research and Development of Satellite Terrestrial Integrated Mobile Communication System as a Disaster Countermeasure [in Japanese]

藤野義之

電子情報通信学会技術研究報告 : 信学技報 112(191), 19-24, 2012-08-30
4

B-1-197 Optimization of Monopulse Beamformer for Digital Array Radar [in Japanese]

Takahashi Ryuhei , Hara Teruyuki

Proceedings of the IEICE General Conference 2012年_通信(1), 197, 2012-03-06

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5

Hierarchical MFMO Circuit Modules for an Energy-Efficient SDR DBF

MAR Jeich , KUO Chi-Cheng , WU Shin-Ru , LIN You-Rong

… The paper emphasizes that the designed hierarchical MFMO circuit modules can be used to develop a power-efficient software-defined radio (SDR) digital beamformer (DBF). … The hierarchical MFMO circuit modules are scalable to the changing number of array branches employed for the SDR DBF to achieve the purpose of power saving. … The efficient reuse of the common MFMO circuit modules in the SDR DBF can also lead to energy reduction. …

IEICE Transactions on Information and Systems 95(2), 413-425, 2012-02-01

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6

Fractionally-Spaced Equalizer Based on High-Order Statistics in Nonlinear Fiber Optics

KOIKE-AKINO Toshiaki , DUAN Chunjie , PARSONS Kieran , KOJIMA Keisuke , YOSHIDA Tsuyoshi , SUGIHARA Takashi , MIZUOCHI Takashi

光ファイバ通信において超高速通信を実現するには非線形歪を補償することが重要である.非線形歪は送信信号データに依存することが知られており,本稿ではこれを利用した等化方式を提案している.本方式は光ファイバ入出力応答の多次元高次統計量(平均・分散・歪度など)を適応的に学習し,データ依存のある非線形歪を効率よく補償する分数間隔等化を適用している.提案方式の利用により40Gbpsの伝送速度・5,230kmの …

Technical report of IEICE. OCS 111(411), 17-22, 2012-01-19

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7

Experimental Results of Multibeam DBF Antenna Using Multi-port Amplifiers [in Japanese]

KIHIRA Kazunari , NAKANISHI Takayuki , TAKAHASHI Toru , KONISHI Yoshihiko

… ,ハイブリッド回路を介して複数の素子を接続するマルチポート増幅器(Multi-port Amplifer: MPA)がある.本報告では,MPAを適用したディジタルビームフォーミング(DBF)アンテナによるマルチビーム伝送を検討しており,3ビーム伝送において,すべての受信点でSINRが35dB程度を達成することを実験により確認した.その他,送信電力や帯域幅,周波数配置の制御といった機能についてもDBFアンテナの有効性を確認した. …

IEICE technical report. Antennas and propagation 111(231), 13-18, 2011-10-06

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8

B-3-5 Development of basic circuit on onboard channelizer and DBF for satellite terrestrial integrated communication system [in Japanese]

Komiyama Norio , Fujino Yoshiyuki , Tsuji Hiroyuki , Hamamoto Naokazu , Wakana Hiromitsu

Proceedings of the Society Conference of IEICE 2011年_通信(1), 287, 2011-08-30

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9

The growing role of the Hippo-NDR kinase signalling in neuronal development and disease

EMOTO Kazuo

Journal of Biochemistry 150(2), 133-141, 2011-08-01

Ichushi Web References (103)
10

Dendrite remodeling in development and disease

EMOTO Kazuo

Development, growth & differentiation 53(3), 277-286, 2011-04-01

Ichushi Web References (88)
11

B-3-5 Development of basic circuit on onboard channelizer and DBF for satellite terrestrial integrated communication system [in Japanese]

Komiyama Norio , Fujino Yoshiyuki , Miura Amane , Tsuji Hiroyuki , Hamamoto Naokazu , Suzuki Ryutaro

Proceedings of the Society Conference of IEICE 2010年_通信(1), 276, 2010-08-31

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12

B-1-221 An Experimental Result of DBF Antenna Using Multi-port Amplifiers [in Japanese]

Kihira Kazunari , Nakanishi Takayuki , Nishino Tamotsu , Konishi Yoshihiko , Chiba Isamu

Proceedings of the Society Conference of IEICE 2010年_通信(1), 221, 2010-08-31

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13

Application of DBF ocean radar observing system: study on influence of surface current upon spreading mechanism of Chattonella antiqa red tide in Ariake bay [in Japanese]

坂井伸一 , 坪野考樹 , 松山昌史他

電力中央研究所報告研究報告 (09031), 1-25,巻頭1〜3, 2010-04-00
14

Practical development of DBF ocean radar: building up a remote real-time monitoring system of surface currents [in Japanese]

松山昌史 , 吉井匠 , 坪野考樹他

電力中央研究所報告研究報告 (09005), 1-13,巻頭1〜3, 2010-03-00
15

ENU Mutagenesis Screening for Dominant Behavioral Mutations Based on Normal Control Data Obtained in Home-Cage Activity, Open-Field, and Passive Avoidance Tests

WADA Yumiko , FURUSE Tamio , YAMADA Ikuko , MASUYA Hiroshi , KUSHIDA Tomoko , SHIBUKAWA Yoko , NAKAI Yuji , KOBAYASHI Kimio , KANEDA Hideki , GONDO Yoichi , NODA Tetsuo , SHIROISHI Toshihiko , WAKANA Shigeharu

… The cutoffs were defined to identify outliers yielding values that deviated from the normal by less than 5% for C57BL/6J, DBA/2J, DBF1, and N2 (DXDB) progenies. … Cutoff values for G1-phenodeviant (DBF1) identification were defined based on values over ± 3.0 SD from the mean of DBF1 for all parameters assessed in the HA and OF tests. …

Experimental Animals 59(4), 495-510, 2010

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16

Sea-breeze and diurnal surface currents around Isahaya Bay mouth measured with DBF marine radar [in Japanese]

坪野考樹 , 吉井匠 , 松山昌史他

Journal of coastal engineering, JSCE 56-1, 401-405, 2009-10-00
17

Tidal currents and tidal fronts around Isahaya Bay mouth measured with DBF Marine Radar [in Japanese]

坪野考樹 , 吉井匠 , 松山昌史他

Journal of coastal engineering, JSCE 55-2, 1006-1010, 2008-10-00
18

Field Observation on Surface Layer's Currents around the Mouth of Isahaya Bay using DBF Ocean Radar [in Japanese]

Tada Akihide , Takenouchi Kenta , Imahayashi Kiyohide , Sakai Shin'ichi , Tsubono Takaki , Mizunuma Michihiro , Nakamura Takehiro

… This study deals with the field observation on surface layer's currents by using ADCP and DBF ocean radar in order to reveal the mechanism of red tide around the mouth of Isahaya Bay. … (1) It is obvious that the current velocity vector detected by DBF ocean radar accords with the one measured by ADCP. … (2) A good correlation was shown by comparison of a drifting buoy's velocity and DBF ocean radar's one. …

Proceedings, ... meeting of Japan Society of Fluid Mechanics 2008, 126, 2008-09-04

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19

Consideration on Adaptive Beamforming with Multiport Parastic Array Radiator Antenna [in Japanese]

MORISHITA Masayuki , YAMADA Hiroyoshi , SUN Chen , TAROMARU Makoto , OHIRA Takashi , YAMAGUCHI Yoshio

… 適応指向性制御を行うDBFアレーはRF回路を複数系統備える必要がある.そのため回路規模や消費電力などが増大するという問題がある.この問題を解決するために,素子の一部をハードウェア構成の容易な素子とした複数給電型パラサイトアレーアンテナを使った適応指向性を行うことを提案する.MuPARアンテナは複数の給電素子とハードウェア構成の容易な可変リアクタを装荷したパラサイト素子から構成されるアンテナで …

The transactions of the Institute of Electronics, Information and Communication Engineers. B J91-B(9), 989-997, 2008-09-01

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20

DOA Estimation Method of VESPA for Coherent Waves [in Japanese]

HARA Rokuzo , MORITA Shinichi , MANIWA Hisakazu

… ESPRIT Algorithm)による測角方式では,アレーアンテナの一部の素子(ガイディングセンサ)についてのみ放射パターンを事前に計測すれば良い.一方,相関性信号が到来する場合,通常のVESPA測角処理では大きな測角誤差が生じる.本稿では,いくつかの素子をDBF(Digital Beam Forming)合成したガイディングセンサを用いて,相関性信号が分離測角できるVESPA測角方式を提案する.計算機シミュレーションにより提案方式の有効性を示した. …

Technical report of IEICE. SANE 108(197), 1-6, 2008-08-22

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