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Estimation of wall parameters based on range profiles

Science China(Information Sciences) 2011年第10期54卷 2178-2189页

作者： LI Xin 1 ,AN DaoXiang 1,HUANG XiaoTao 1 & PENG ShiRui 2 1 College of Electronic Science and Engineering,National Uniersity of Defense Technology,Changsha 410073,China 2 Department of Information Counter Measurement Airforce Radar Academy,Wuhan 430019,China College of Electronic Science and Engineering National University of Defense Technology

Compensation of wall effects is of main concern in SAR through-wall *** parameters are essential for the compensation,which are normally not known a priori.A model of SAR working in sidelooking strip mode for through-wall imaging is established,with the path of signal due to refraction taken into *** analyzing the echo configuration in time domain,a new procedure for estimating wall parameters using high range resolution profiles is *** extracting time delay of target counterpart,the thickness and permittivity of wall are figured out exactly by employing numerical equation method and intersecting of searching *** the estimated parameters,focused image of targets in a room is acquired after wall effects are compensated in imaging processing with back projection *** results verify the validity of the theoretical analysis and imaging algorithm.

关键词： synthetic aperture radar (SAR) range profiles parameters estimation wall compensation

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AUTOMATIC TARGET RECOGNITION OF RADAR HRRP BASED ON HIGH ORDER CENTRAL MOMENTS FEATURES

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Journal of Electronics(China) 2009年第2期26卷 184-190页

作者： Luo Si Li Shaohong School of Electronics and Information Engineering Beijing University of Aeronautics and Astronautics Beijing 100191 China

The paper addresses the problem of target recognition using High-resolution Radar range profiles(HRRP).A novel approach of feature extraction and dimension reduction based on extended high order central moments is proposed in order to reduce the dimension of range *** extracted from radar HRRPs are normalized and smoothed,and then comparative analysis of the similar approaches is *** range profiles are obtained by step frequency technique using the two-dimensional backscatters distribution data of four different aircraft *** template matching method by nearest neighbor rules,which is based on the theory of kernel methods for pattern analysis,is used to classify and identify the range profiles from four different *** simulation results show that the proposed approach can achieve good performance of stability,shift independence and higher recognition *** is helpful for real-time identification and the engineering implements of automatic target recognition using *** number of required templates could be reduced con-siderably while maintaining an equivalent recognition rate.

关键词： High Resolution Radar(HRR) range profiles Feature extraction High Order Central Moments(HOCM)

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