2006 Fiscal Year Final Research Report Summary
Investigation on an enhanced S/N array antenna system applied to the battery-free wireless capsule endoscope within a CCD camera
| Project/Area Number |
16560321
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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 | Ibaraki University |
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Principal Investigator |
KAGOSHIMA Kenichi Ibaraki University, The College of Engineering, Professor, 工学部, 教授 (70292472)
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| Co-Investigator(Kenkyū-buntansha) |
OBOTE Shigeki Ibaraki University, The College of Engineering, Associate Professor, 工学部, 助教授 (50323209)
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| Project Period (FY) |
2004 – 2006
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| Keywords | Antenna / Array antenna / Mutual coupling / Maximum directivity / Maximum received power / Element matched load / Reciprocity of directive patterns / CCD |
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| Research Abstract |
The purpose of this research work was to improve the performance of wireless capsule endoscopes by adaptive array antenna technologies. Quality of transmitted inner body images can be improved by array antenna technologies and this is also effective to suppress the negative effects by inner body muscle and bone. Especially, the most important research problem is how to determine antenna allocation and their variable antenna weights.
We have established the theoretical model of a receiving array antenna system considering mutual coupling effect. Furthermore the comparative study between the array antenna with maximum receiving power and the array antenna with maximum transmitting directivity gain has been performed. The weights of the array antenna with maximum receiving power were determined based on Minimum Mean Square Error (MMSE) criteria. By the comparative study, we have arrived at the necessary condition which is required in closely spaced adaptive array antennas.
Furthermore, we have chosen Tapped Delay Line-Adaptive Array Antenna (TDL-AAA) as the most suitable adaptive array antenna system because TDL-AAA is a spacial and temporal equalizer. This equalizer is very effective to reduce the number of antenna elements under a dense multipath environment. We have derived the required number of antenna elements and tap stages based on the zero forcing criteria.
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Research Products
(12 results)
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[Book] エヌ・アィー・エス2006
Author(s)
鹿子嶋憲一, 尾保手茂樹
Total Pages
1.1.2.2
Publisher
次世代ICタグ
Description
「研究成果報告書概要(和文)」より
