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《Acta Electronica Sinica》 2005-09
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A New Method for Parametric Estimation of GTD Model

HE Zhi-hua,ZHANG Xu-feng,LI Xiang,ZHUANG Zhao-wen(College of Electronic Science and Engineering,National Univ.of Defense Technology,Changsha,Hunan 410073,China)  
The GTD model which can accurately describe high frequency electromagnetic back scattering,is introduced into the MUSIC algorithm as its signal model to replace the traditional signal model of the MUSIC algorithm,and the MUSIC algorithm is improved in some extent.The paper presents that,in the eigen-analysis method,we can utilize the orthogonal property between signal and noise subspace.The improved MUSIC algorithm can accurately estimate the type of the scattering centers as well as the position of them,and finally results in good effects.We also simulate the impact of the spatial smoothing preprocessing method on the orthogonal property between signal and noise subspace,and point out that the spatial smoothing preprocessing method can affect the structure of the noise subspace and that of the signal subspace,so the preprocessing method can influence the estimation of the type of the scattering centers,we should modify the final result of the scattering centers' type.
【CateGory Index】: TN011
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