| Project/Area Number |
13650425
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
情報通信工学
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| Research Institution | Chuo University |
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Principal Investigator |
SHIRAI Hiroshi Chuo University, Faculty of Science and Engineering, Professor, 理工学部, 教授 (00196594)
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| Co-Investigator(Kenkyū-buntansha) |
SATO Ryoichi Niigata University, Faculty of education and Human Science, Associate Professor, 教育人間科学部, 助教授 (00293184)
MAKINO Mitsunori Chuo University, Faculty of Science and Engineering, Associate Professor, 理工学部, 助教授 (90238890)
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| Project Period (FY) |
2001 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2003: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2002: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2001: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | Mobile communication / Electromagnetic wave propagation / Visualization / Reflection coefficient / GTD / Ray tracing / Polygonal approximation / SBR Method / SBR / 等価インピーダンス / 多角形導体近似 / 等価インピーダンス近似 |
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| Research Abstract |
Electromagnetic scattering by the building walls has been analyzed first, since this is one of the important factors for predicting the wave propagation in urban area enclosed by tall buildings. For the analysis of crack scattering, we could establish the depth estimation method from back scattering response for cracks on the metal surfaces.
Next, Adaptive shooting and Bouncing Rays (Adaptive SBR) method has been proposed to analyze electromagnetic wave propagation effectively, by 2Dcross sectional analysis, our method has been tested in detail how many multiple reflections and diffractions should be included, and how many samples should be taken to estimate the global field distribution.
In order to check the accuracy of the method, the results are compared with those obtained by the Finite Difference Time Domain (FDTD) Method. Test measurements are also done for signal strength from base station for 1.9GHz (PHS) band. Good agreement has been found to show the validity of our method. We have also tried to find more efficientalgorithm and fast calculation method to handle more karger sample data.
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