| Project/Area Number |
17560337
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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 | Nagoya Institute of Technology |
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Principal Investigator |
WANG Jianqing Nagoya Institute of Technology, Graduate School of Engineering, Professor, 大学院工学研究科, 教授 (70250694)
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| Co-Investigator(Kenkyū-buntansha) |
FUJIWARA Osamu Nagoya Institute of Technology, Graduate School of Engineering, Professor, 大学院工学研究科, 教授 (60135316)
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| Project Period (FY) |
2005 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 2006: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2005: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | On-body communication / Intra-body communication / Channel modeling / UWB / SAR / 人体伝送路 / アンテナ / 変復調方式 |
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| Research Abstract |
The ultra wide band (UWB) system is a promising candidate for the on-body and intra-body communications in view of its features of small power and multi-path compensation. In this study, we have first analyzed the on-body channel characteristics by using the frequency-dependent finite difference time domain (FD^2TD) method together with an anatomically based human model. We have determined the frequency-dependent dielectric properties of human body by measurements, and have incorporated them into the FD^2TD algorithm via Debye approximation. Based on the FD^2TD results, we have derived the channel characteristics (both amplitude and group delay) on human body. We have found that the frequencies below 100 MHz are preferable to the on-body communications, and therefore have proposed a UWB pulse transmission system with a bandwidth of 10-70 MHz. We have further investigated the UWB-IR performance for the UWB pulse transmission system, and have demonstrated that the degradation on the bit error rate (BER) is only 0.1 dB due to the on-body transmission. On the other hand, we have also designed a UWB implanted antenna for intra-body communication at 3-5 GHz band, and have shown its usefulness for medical applications. We have further developed a method for the specific energy absorption (SA) and specific absorption rate (SAR) evaluation of UWB pulses, and have demonstrated the safety of the UWB applications in on-body and intra-body communications.
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