2010 Fiscal Year Final Research Report
Blind array calibration for precise location estimation of wireless terminal
| Project/Area Number |
20560349
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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 | Niigata University |
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Principal Investigator |
YAMADA Hiroyoshi Niigata University, 自然科学系, 教授 (20251788)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAGUCHI Yoshio 新潟大学, 自然科学系, 教授 (50115086)
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| Project Period (FY) |
2008 – 2010
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| Keywords | アレーアンテナ / アレーキャリブレーション / 到来方向推定 / 位置推定 |
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| Research Abstract |
Precise indoor wireless terminal location estimation is necessary to provide context awareness service in Ubiquitous network. For the terminal location estimation, array antenna is often adopted. In this research, we have proposed several key algorithms for antenna array calibration. For a blind calibration technique, we develop iterative method with Hermitian condition of the calibration matrix, which estimate the calibration matrix as well as direction-of-arrival of the incident waves. Two new calibration methods with reference calibration waves, the extended calibration method by using virtual array and the method in multipath environment, have also proposed. Availability of these methods is evaluated numerically and experimentally. In addition, a terminal location estimation algorithm in the multipath environments has proposed, which utilize reflected waves in the room as well as direct wave(s).
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