池上 文夫 Ikegami Fumio

ID:1000020093180

拓殖大学工学部 Faculty of Engineering Takushoku University (1997年 CiNii収録論文より)

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Articles:  1-20 of 40

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  • Measurement and Analysis on Multipath Propagation for a Basin Area  [in Japanese]

    TANAKA S. , MIYATA T. , KOSHIO T. , GOTO N. , IKEGAMI F. , AIZAWA T.

    先に1.2[GHz]帯でのパルス幅0.3[μS]台の, TVパルスによる多重波測定系を報告した. これは, 遅延時間10[μS]台の測定を目的としたものであった. 今回, 甲府盆地での山岳反射の測定のため, 諸元を変更し, 長距離の山岳反射の測定を行った.

    Proceedings of the IEICE General Conference 1997年.通信(1), 12, 1997-03-06

  • Bit Error Rate Characteristics of Anti-Multipath Modulation Technique BPSK-RZ in Hilly Areas  [in Japanese]

    MAEYAMA Toshiyuki , TRISILA Heru Laksono , KITANO Yasushi , IKEGAMI Fumio

    山岳・丘陵反射波が顕著なマイクロセルモデルの伝搬環境で,BPSK方式と耐多重波変復調方式BPSK-RZについて128〜1,024 kbpsの高速伝送レートにおけるビット誤り率を測定した.既に測定した多重波構造と比較して,BPSK-RZの誤り率軽減効果は,建物反射波と伝搬構造の異なる丘陵からの散乱反射波に対しても有効であり,ビット誤り率が遅延時間と伝送速度の関係に依存する性質が理論とよく対応すること …

    The Transactions of the Institute of Electronics,Information and Communication Engineers. B-(0xF9C2) 00079(00009), 511-519, 1996-09-25

    References (16) Cited by (1)

  • Physical structure of bit error occurrence on multi-path delay environment in mobile communications  [in Japanese]

    MAEYAMA Toshiyuki , IKEGAMI Fumio

    It was reconfirmed that bit errors are caused by thermal noise when anti-multipath modulation technique PSK-RZ could suppress the effects of multipath distortion. The cause of bit errors is separated …

    IEICE technical report. Antennas and propagation 96(224), 59-65, 1996-08-22

    References (17) Cited by (2)

  • Measurements and Analyses on Multipath Propagation Structure for Small-Cell Digital Mobile Radio in Hilly Areas  [in Japanese]

    LAKSONO Trisila Heru , MAEYAMA Toshiyuki , KITANO Yasushi , IKEGAMI Fumio

    高速ディジタル移動通信における誤り率の特性や軽減方法の研究には,多重波伝搬構造の解明が不可欠である.本研究には,2組の指向性アンテナと,鋭いパルスを挿入したTV映像信号による遅延時間測定法とを組み合わせた測定系を開発し,丘陵のある小セル・モデル地域において多重波伝搬構造を精細に測定した.測定コース周辺の建物反射波および周囲の丘陵から顕著な反射波の他に,遠方の建物からの反射波や建物の多重(複数回)反 …

    The Transactions of the Institute of Electronics,Information and Communication Engineers. B-(0xF9C2) 00079(00003), 168-175, 1996-03-25

    References (12) Cited by (4)

  • 巨星逝く : 前田憲一先生を偲んで  [in Japanese]

    池上 文夫

    The Journal of the Institute of Electronics, Information, and Communication Engineers 78(12), 1203-1204, 1995-12-25

  • Analysis of bit-error structure under multipath environments in digital mobile radio communication  [in Japanese]

    MURATA Hidefumi , MAEYAMA Toshiyuki , IKEGAMI Fumio

    It was reconfirmed that bit-errors are caused by thermal noise when anti-multipath modulation technique (BPSK-RZ) could suppress the effects of multipath distortion. Measurements showed that the stati …

    Technical report of IEICE. RCS 95(390), 57-62, 1995-11-27

    References (6) Cited by (1)

  • A study on spatial probability of error-free transmission in mobile message communication  [in Japanese]

    MAEYAMA Toshiyuki , ONO Daisuke , MURATA Hidefumi , IKEGAMI Fumio

    Realizability of mobile message communication was studied on spatial probability of error-free transmission. Measurement of spatial probability were made by simulation test. The measured spatial proba …

    Technical report of IEICE. RCS 95(390), 51-56, 1995-11-27

    References (10) Cited by (1)

  • Bit error rate characteristics of anti-multipath modulation technique PSK-RZ in hilly areas  [in Japanese]

    MAEYAMA Toshiyuki , H. L. TRISILA , KITANO Yasushi , IKEGAMI Fumio

    Bit error rates (BER) of BPSK and anti-multipath modulation system BPSK-RZ were measured at bit rates up to about 1Mbps, on the test course in the campus of Takushoku University as an example of a sma …

    Technical report of IEICE. SAT 95(161), 1-6, 1995-07-21

    References (12) Cited by (3)

  • Analysis of Multipath Propagation for Small-Cell Digital Mobile Radio Communications  [in Japanese]

    TRISILA HERU LAKSONO , MAEYAMA Toshiyuki , KITANO Yasushi , IKEGAMI Fumio

    Multipath propagation structure was measured on the University Campus, as a model of a small-cell system, by use of a combination of two directive antennas as receiving antenna. Detailed analyses reve …

    IEICE technical report. Antennas and propagation 95(153), 39-46, 1995-07-20

    References (6) Cited by (2)

  • Indoor propagation characteristics of circularly polarized waves for wireless LAN  [in Japanese]

    Kasahara N. , Maeyama T. , Laksono TESILA Heru , Ikegami H.

    室内無線LANにおいて10Mbps程度の高速、高信頼伝送を実現する方法の1つとして、円偏波の利用が考えられる。その理由の1つは円偏波により、室内の奇数回反射波を抑制して空間的フェージング及び多重波遅延歪みを軽減することにある。もう1つの理由は円偏波で送信し、受信側では垂直、水平の直交偏波で別々に受信して、2つのチャネルをフェージング相関の小さいダイバーシチ枝とすることである。室内の見通し内伝搬にお …

    電子情報通信学会秋季大会講演論文集 1994年.通信(1), 10, 1994-09-26

  • Indoor propagation characteristics of circularly polarized waves  [in Japanese]

    Kasahara Nobumoto , Maeyama Toshiyuki , Laksono Trisila Heru , Ikegami Fumio

    This paper describes briefly the results of the measured indoor propagafion characteristics of circularly polarized waves.Spatial fading is reduced by using circular polarizafion in comparison with li …

    IEICE technical report. Antennas and propagation 93(464), 65-70, 1994-02-17

  • Measurement of Propagation Characteristics of Circularly Polarized Waves in Multipath Propagation Environments  [in Japanese]

    Laksono Trisila Heru , Kitano Yasushi , Ikegami Fumio

    Measurements of circulary polarized wave propagation were made in Hachioji Campus of Takushoku University.Though the reduction of fading was not clear With circular polarization,marked polarization di …

    IEICE technical report. Antennas and propagation 93(464), 57-64, 1994-02-17

  • Analysis of Multipath Propagation Structure and Bit Error Rates in Digital Mobile Radio Communication  [in Japanese]

    TRISILA H. L. , Maeyama Toshiyuki , Kitano Yasushi , Ikegami Fumio

    市街地移動通信においては、多重波伝搬によるフェージングが発生しそれに起因する符号誤りがディジタル移動通信の高速化に対して障害となる。本研究では、拓殖大学構内で求められた平均電界強度の特性及び多重波伝搬構造の測定結果と128kbps、BPSK-RZのビット誤り率特性の関係を分析する。

    信学秋大会, B-347, 1994

    Cited by (3)

  • Bit Error Rate Performance or BPSK-RZ for Long Delayed Multipath Signals  [in Japanese]

    Murata Hidefumi , Maeyama Toshiyuki , Ikegami Fumio

    多重波環境下でディジタルデータ伝送を行う際、耐多重波変調方式BPSK-RZを用いることで、誤り率の改善が確認された。しかし、測定された誤り率は、平均受信電力に対応した誤り率に比べ悪化していた。原因の一つとして、次のことが推測される。BPSK-RZは遅延時間τとシンボル間隔Tsが0.1<τ/Ts<0.8程度の範囲にわたり優れた耐多重波特性を示す。この効果が効かないτ/Tsが1以上でレベル …

    信学秋大会, 1994-09, 344, 1994

    Cited by (2)

  • Measurement of Bit Error Rate in Digital Mobile Communications  [in Japanese]

    Maeyama Toshiyuki , Laksono Trisila Heru , Kitano Yasushi , Ikegami Fumio

    拓殖大学構内において、平均ビット誤り率の野外測定を行った。そこで、耐多重波変調方式BPSK-RZを用いることで誤り率の改善が確認されたので報告する。

    信学秋大会, B-343, 1994

    Cited by (3)

  • Error performance and spatial probability of error-free transmission in mobile message communication  [in Japanese]

    Ono Daisuke , Maeyama Toshiyuki , Toshimitsu Matsutaro , Ikegami Fumio

    Error performances were measured for various propagation and system parameters to obtain the spafial probability of error-free transmission in mobile message communication.BPSK is not good in transmis …

    IEICE technical report. Antennas and propagation, 25-32, 1994

    Cited by (2)

  • Measurment of bit/Packet error performance in mobile message communication  [in Japanese]

    Ono Daisuke , Kasahara Nobumoto , Ikegami Fumio

    Measurement of bit, packet error rates is required to nallyze the spatial probability of error-free transmission in mobile message communication.This paper describes the principle and the composition …

    Technical report of IEICE. RCS, RCS93-74, 1993

    Cited by (3)

  • Attenuation coefficient of Mountain-Reflected signal in Digital Mobile Communications  [in Japanese]

    Maeyama Toshiyuki , Laksono Trisila Heru , Kitano Yasushi , Ikegami Fumio

    This paper describes the results of measurements of attenuation coefficient of mountain reflection for more generalized conditions on the university campus.A modified TV-Pulse method has been develope …

    IEICE technical report. Antennas and propagation, 53-60, 1993

    Cited by (2)

  • Measurement of Propagation Structure in Digital Small-Cell Mobile Radio Communication  [in Japanese]

    TRISILA H. L. , Maeyama Toshiyuki , Kitano Yasushi , Ikegami Fumio

    Measurement of multipath propagation structure were made in the environments where reflection waves from buildings and hills exist. Detailed measurements and analyses revealed apparent reflection poin …

    IEICE technical report. Antennas and propagation, AP93-106, 1993

    Cited by (6)

  • 耐多重波変復調方式について (ディジタル移動通信論文特集) -- (変復調・誤り訂正)  [in Japanese]

    YOSHIDA S. , 池上 文夫 , 竹内 勉

    The Transactions of the Institute of Electronics,Information and Communication Engineers. B-(0xF9C2) 73(11), p668-674, 1990-11

    Cited by (23)

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