| Project/Area Number |
13650399
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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 | Tokyo Institute of Technology |
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Principal Investigator |
TAKADA Jun-ichi Tokyo Institute of Technology, Graduate School of Engineering, Associate Professor, 大学院・理工学研究科, 助教授 (90222083)
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| Co-Investigator(Kenkyū-buntansha) |
ARAKI Kiyomichi Tokyo Institute of Technology, Graduate School of Engineering, Professor, 大学院・理工学研究科, 教授 (90016668)
SAKAGUCHI Kei Tokyo Institute of Technology, Graduate School of Engineering, Research Associate, 大学院・理工学研究科, 助手 (80323799)
PHONGCHAROENPANICH Chuwong KMITL, Thailand, Lecturer, Lecturer
KRAIRIKSH Monai KMITL, Thailand, Associate Professor, Associate Professor
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| Project Period (FY) |
2001 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 2002: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2001: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | Spatio-temporal channel model / Fading simulator / Ray-tracing method / Channel sounder / Mobile communications / Adaptive array antenna / International cooperation / Thailand / アダフティフアレーアンテナ |
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| Research Abstract |
This study aimed at the development of the standard spatio-temporal channel model for indoor and outdoor environments. Two approaches are taken for the purpose : the spatio-temporal channel sounding that measures the spatio-temporal channel parameters in the real environment, and the ray-tracing simulation that predicts the channel properties based on the building database. Both approaches separate the channels into geometrical paths and estimate the directions of departure and arrival, delay time, doppler frequency, and path gain. Statistical behavior of these paths are focused in the study to obtain the standard channel model.
The ray-tracing simulator has been validated in the suburban microcell, urban microcell and indoor environments by comparing with the experiments. A new method has been developed to treat the case when the road and the direction of arrival are close to parallel.
The spatio-temporal channel sounder has been expanded to the multiple-input multiple-output (MIMO) architecture, and the prototype has been fabricated at 2.45 GHz for the test operation. Simultaneously, another simplified channel sounder using a vector network analyzer and an antenna position controller has been built. It has been used for the indoor and short-range wireless channels to find the geometrical paths. It has been also used to study the non-specular scattering from the wall surface.
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