2007 Fiscal Year Final Research Report Summary
Research on Electromagnetic Wave Propagation Prediction for Advanced Ubiquitous Information Communications
| Project/Area Number |
17560349
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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 |
Communication/Network engineering
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| Research Institution | Chuo University |
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Principal Investigator |
SHIRAI Hiroshi Chuo University, Faculty of Science and Engineering, Professor (00196594)
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| Co-Investigator(Kenkyū-buntansha) |
MAKINO Mitsunori Chuo University, Faculty of Science and Engineering, Professor (90238890)
SATO Ryoichi Niigata University, Faculty of Education and Human Sciences, Associate Professor (00293184)
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| Project Period (FY) |
2005 – 2007
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| Keywords | Mobile communication / Electromagnetic wave propagation / Visualization / Ubiquitous Communication / SBR Method / Shooting bouncing rays method |
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| Research Abstract |
For future advanced ubiquitous information communications, it would be expected to use higher frequency for wireless communication, where detail surrounding environment would affect for electromagnetic wave propagation. Therefore effective analytical propagation prediction method should be needed for proper installation for wireless access points. By our investigation, Shooting and Bouncing Rays (SBR) method is found to be a powerful tool for such purpose.
SBR method is one of the high frequency methods and discretized radiating rays will be traced from an antenna to the propagating space with experiencing reflections and transmissions through walls and diffraction at corners of the surrounding buildings. Since it would be impossible to take into account all multiple scattering processes, one has to find an efficient algorithm for extracting dominant contribution from them.
It is found that direct, multiply reflected and primary edge diffracted waves play important roles to the total field for high frequency outdoor propagation environment, whereas multiply reflected and transmitted waves are important components for indoor propagation.
Special attention has been made for ray tracing through lossy dielectric medium such as concrete walls, where the proper definition of the propagation direction has to be found.
Wave propagation is difficult to understand since one cannot see it We have also studied visualization methods of the electromagnetic field quantities such as electric, magnetic, and energy flow vector field by coloring and expressing graphically.
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