研究者詳細 - 山田　寛喜

論文 - 山田　寛喜

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相関波到来時におけるKhatri-Rao積拡張アレーを用いた信号パラメータ推定に関する検討

白井智史, 山田寛喜, 山口芳雄

電子情報通信学会技術研究報告 AP2012-34 ( 7 ) 23 - 28 2012年7月

SAR Tomographyの高度推定分解能向上に関する実験的検討

山田敏弘, 山田寛喜, 山口芳雄

電子情報通信学会技術研究報告 AP2012-35 ( 7 ) 29 - 34 2012年7月

RESOLUTION ENHANCEMENT OF MULTI-BASELINE SAR TOMOGRAPHY WITH SPARSE SAMPLES 査読

Hiroyoshi Yamada, Toshihiro Yamada, Ryoichi Sato, Yoshio Yamaguchi

Electronic Proc. of IGARSS 2012 2012年7月

Fundamental Study on Semi-blind Scattering Component Decomposition for POLSAR data using ICA 査読

H. Yamada, Y. Yamaguchi, R. Sato

Electronic Proc. of EUSAR 2012 2012年4月

Investigation of Polarimetric Scattering Charac te - ristics For Accurate Classification of Oblique Wetland Boundary 査読

R. Sato, Y. Yamaguchi, H. Yamada

Electronic Proc. of EUSAR 2012 2012年4月

多入射角合成開口レーダを用いた植生・土壌の誘電率測定法について

渡邉卓磨, 山田寛喜, 有井基文, 小林弘一, 山口芳雄

電気学会計測研究会 IM-12-017 ( 12 ) 1 - 4 2012年3月

カトリ・ラオ積拡張アレーを用いたDOA推定誤差と改善法に関する一検討

青柳岳泰, 山田寛喜, 山口芳雄

電子情報通信学会技術研究報告 AP2011-167 ( 1 ) 119 - 124 2012年1月

SCATTERING POWER DECOMOOSITION USING FULLY POLARIMETRIC INFORMATION 査読

Yoshio Yamaguchi, Gulab Singh, Sang-Eun Park, Hiroyoshi Yamada

2012 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS) 91 - 94 2012年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

There exist 9 independent polarization parameters in the coherency or covariance matrix as the second order statistics. Various decomposition methods have been presented based on the physical scattering model using these parameters. However, none of them accounts for all polarimetric information, typically leaving T-13 element un-accounted in the coherency matrix. This paper presents a complete four-component scattering power decomposition method using all polarimetric information. Using double unitary transformation of measured coherency matrix, it is possible to eliminate T-23 element, which results in a reduction of polraization parameters from 9 to 7. Then by unitary transformation of expansion matrices, it becomes possible to account for T-13 term, which has never been accounted for in the physical model-based decomposition. By the double unitary transformations to minimize the T-33 component, all polarimetric parameters are accounted. This methodology also reduces the negative power problem significantly. This method is a further extension of the existing four-component decomposition. The four scattering powers (surface, double bounce, volume, helix) are assigned to blue, red, green, and yellow to compose full-color image. An example image of San Francisco area acquired with ALOS-PALSAR is shown to validate the decomposed result.

DOI： 10.1109/IGARSS.2012.6351629

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MODEL EXPERIMENT OF PERMITTIVITY RETRIEVAL METHOD FOR FORESTED AREA BY USING BREWSTER'S ANGLE 査読

Takuma Watanabe, Hiroyoshi Yamada, Motofumi Arii, Sang-Eun Park, Yoshio Yamaguchi

2012 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS) 1477 - 1480 2012年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

The moisture content of terrain or forest, which is highly related to the permittivity, is a key parameter to understand global water cycle. This study is focused on retrieving permittivity from radar backscattering measurements. The basic concept of the proposal is to utilize Brewster's angle effect of double-bounce backscattering. If the Brewster's angle is known, it is possible to estimate the permittivity of medium directly. In order to demonstrate the Brewster's angle effects on the backscattering of forested area, the authors have carried out a simple laboratory experiment and the results are shown in this paper.

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STRICKEN MAN-MADE OBJECT DETECTION USING SCATTERING POWER DECOMPOSITION WITH NNED AND ROTATION OF THE COVARIANCE MATRIX 査読

Ryoichi Sato, Yuta Takahashi, Yoshio Yamaguchi, Hiroyoshi Yamada

2012 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS) 5121 - 5124 2012年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

This paper proposes a simple man-made object detection method by utilizing the nonnegative eigenvalue decomposition (NNED) [1] and a unitary rotation [2] to the covariance matrix. It is observed from the result of the PolSAR image analysis using the proposed method that the double-bounce scattering contribution P-d becomes stronger than that by the conventional scattering power decomposition even when the stricken residential houses are built on rough and slope ground surface. Furthermore, in order to analytically verify the improved effect for the stricken man-made object detection, the Finite-Difference Time-Domain (FDTD) polarimetric scattering analysis is also carried out for a simplified man-made objects model, which consists of quad dielectric rectangular parallelepipeds on finite circular plate with rough surface. The rectangular parallelepipeds are considered as a simplified man-made buildings model. It is cleared from the FDTD result that the enhancement of P-d can be realized by doing the C-22 rotation, in addition to the NNED procedure.

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SENSITIVITY STUDY OF RADAR BACKSCATTER FROM BOREAL FOREST USING DISCRETE SCATTERER MODEL 査読

Motofumi Arii, Takuma Watanabe, Hiroyoshi Yamada

2012 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS) 1425 - 1428 2012年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

Polarimetric SAR decomposition has been expected to be a potential candidate of a tool to measure physical parameters of vegetated fields For this context, it is important to validate theoretical model quantitatively with well controlled experiment. In this paper, simple boreal forest was modeled based on discrete scatterer model. Through sensitivity study by using the model, we propose several useful indexes to infer vegetation parameters such as soil moisture. This study will be validated by X-band indoor full polarimetric SAR in Niigata University.

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屋内新湯検出手法のチャネル行列変動に対する性能評価

小川研, 山田寛喜, 山口芳雄

電子情報通信学会技術研究報告 AP2011-96 ( 11 ) 42 - 44 2011年11月

Fundamental Study on Channel Model of MIMO sensor for Event Detection 査読

Akira Kumakura, Hiroyoshi Yamada, Kentaro Nishimori, Yoshio Yamaguchi

Electronic Proc. Of ISAP 2011 2011年10月

Array Configuration and Channel Model of MIMO Sensor for Home Security 査読

Hiroyoshi Yamada, Kei Tanaka, Yoshio Yamaguchi

Electronic Proc. Of ISAP 2011 2011年10月

Performance Evaluation of MIMO Sensor algorithms for Indoor Intrusion Detection 査読

Ken OGAWA, Hiroyoshi YAMADA, Yuta KUROSAKI, Yoshio YAMAGUCHI

Electronic Proc. Of ISAP 2011 2011年10月

Experimental Study on Permittivity Estimation for Vegetation and Soil by Using Brewster's Angle 査読

Takuma Watanabe, Hiroyoshi Yamada, Motofumi Arii

Electronic Proc. Of ISAP 2011 2011年10月

張型体積散乱モデルの実験的検討

大川平, 山口芳雄, 山田寛喜, 佐藤彰展

電子情報通信学会ソサイエティ大会 ( B-2-3 ) 2011年9月

多入射角PolSARによる植生観測のための角柱ターゲットを用いたモデル実験

渡邉卓磨, 山田寛喜, 有井基文, 小林弘一, 山口芳雄

2011年度電子情報通信学会信越支部大会 ( 4C-4 ) 2011年9月

拡張型体積散乱モデルの有用性に関する実験的検討

大川平, 山口芳雄, 山田寛喜, 佐藤彰展

2011年度電子情報通信学会信越支部大会 ( 4B-2 ) 2011年9月

反復計算を用いたブラインドアレー校正の収束特性に関する検討

高橋善樹, 山田寛喜, 山口芳雄

2011年度電子情報通信学会信越支部大会 ( 4B-1 ) 2011年9月

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