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检索条件"任意字段=2009 2nd Asian-Pacific Conference on Synthetic Aperture Radar（APSAR2009）"

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Omega-K Algorithm for Bistatic Spotlight SAR Imaging

Omega-K Algorithm for Bistatic Spotlight SAR Imaging

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2009 2nd asian-pacific conference on synthetic aperture radar（apsar2009）

作者： HU Huachao,JIA Xin,CHEN Yingying,WU Wei Academy of Equipment Command&Technology Beijing,P.R.China

Bistatic spotlight synthetic aperture radar（SAR）which uses a separated transmitter and receiver has been studied intensively due to its *** paper introduces omega-k algorithm for bistatic spotlight SAR imaging in the parallel track *** the principle of stationary phase（POSP）and the point scattering response（PSR）of bistatic spotlight SAR,an omega-k algorithm is derived,which is based on the geometry of bistatic spotlight ***,the algorithm is validated through point target simulations.

关键词： Bistatic Spotlight synthetic aperture radar(SAR) Omega-K Algorithm radar Imaging

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Envelope Simulation by MATLAB-Compatible Models of a SAR system

Envelope Simulation by MATLAB-Compatible Models of a SAR sys...

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2009 2nd asian-pacific conference on synthetic aperture radar（apsar2009）

作者： Xiaoyang Jiang 1 2 Yunhua Zhang 1 1Center for Space Science and Applied Research CAS Beijing China 100190 2Graduate School of the Chinese Academy of Sciences Beijing China 100039

Fast and accurate system behavior simulation is an important technique for developing advanced radar system,Envelope simulation has been proved to be an efficient tool for analyzing and simulating narrow bandwidth system,such as communication system and radar *** this work a common model for the envelope simulation of the transmitter and receiver of a SAR system is *** results validate the reliability and efficiency of the proposed simulation method.

关键词： envelope simulation narrow bandwidth signal radar system SAR

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Realization and Comparison of QRD Algorithms for STAP

Realization and Comparison of QRD Algorithms for STAP

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2009 2nd asian-pacific conference on synthetic aperture radar（apsar2009）

作者： Shang Bin Li Shaohong Ren Yi Li Jingsheng (BeiHang University Beijing 100191 China Aviation Industry Corporation I Beijing 100022)

For space time adaptive processing of airborne multi-channel array radar,the computation load of calculating weighting vector is the *** sample matrix inversion（SMI）algorithm,QR decomposition usually is used to calculate weighting *** types of QR decomposition algorithm,Gram-Schmidt,modified Gram-Schmidt,Householder transform and Givens rotation,were studied in this *** realization with ADSP-TS201,the computation efficiency and numerical stability of these four algorithms were *** realization results were validated with simulated multi-channel echo data.

关键词： Multi-Channel Array radar STAP QR decomposition

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A New Method of SAR Images Geometric Rectification Under Undulate Areas Based on the Application of Navigation

A New Method of SAR Images Geometric Rectification Under Und...

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2009 2nd asian-pacific conference on synthetic aperture radar（apsar2009）

作者： Sanhai Ren,Wenge Chang School of Electronic Science and Engineering,National University of Defence Technology Changsha,410073,P.R.China

The guidance precision can be improved greatly when the synthetic aperture radar(SAR)is used in the navigation system of aircraft or ***,the inherent geometric distortion of SAR images under undulate areas makes the matching navigation error to be ***,it is necessary to research geometric rectification methods for SAR images under undulate areas.A new method of SAR image geometric correction under undulate areas based on the application of navigation is presented in the ***,it rectifies the range position error caused by elevation in the slant range ***,it corrects the position error caused by the scale difference between slant range and ground range in the ground ***,it transforms the reference frame of the real-time image to the map according to the course *** the end,a simulation using the DEM data of GUIZHOU of China is given,which gets perfect results,to testify the validity and accuracy of the method.

关键词： synthetic aperture radar SAR image geometric rectification matching navigation

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A New Method of ISAR Motion Compensation Based on Genetic Algorithm

A New Method of ISAR Motion Compensation Based on Genetic Al...

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2009 2nd asian-pacific conference on synthetic aperture radar（apsar2009）

作者： Xiang Long 1 Liu Runhua 2 Peng Shibao 1 1 Department of Graduate Management AFRA Wuhan 430019 China 2 Research Center of radar Imaging Technique AFRA Wuhan 430019 China

Based on genetic algorithm,a new method of ISAR motion compensation is presented in this *** to guarantee that GAMIC（genetic algorithm of maximum image contrast）and GAMIE（genetic algorithm of minimum image entropy）converge on the optimum solution,the optimum individual preserved tactical is *** to reduce the heavy computation of GAMIC and GAMIE,the minimum distance and the minimum entropy of the range profile after motion compensation are taken as the fitness functions of genetic *** improvements described above,two new ISAR motion compensation approaches,named as GAMRD and GAMRE,are proposed in this *** two new approaches have been verified by simulation data and measurement ISAR data.

关键词： ISAR Motion Compensation Genetic Algorithm Minimum Entropy Minimum Distance

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A Novel Algorithm for Repeated Trajectory Bistatic Spotlight SAR Imaging

A Novel Algorithm for Repeated Trajectory Bistatic Spotlight...

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2009 2nd asian-pacific conference on synthetic aperture radar（apsar2009）

作者： He Bosen 1 Zhang Ran 1 Song Meng 1 LI Bingning 2 Xing Meng-dao 1 1.National key Laboratory for radar Signal Processing Xidian University 710071 Xi’an P.R.China 2.PLA 61191 HangZhou 310023 China

This paper makes a detailed analysis on the echo signal of the repeated trajectory bistatic *** to the characteristic of spotlight SAR signal,an algorithm based on Spectrum Analysis（SPECAN）method is *** algorithm removes the azimuth ambiguity,and it also ensures good imaging quality over wildfield scene without defocus caused by spatial variance of target position.

关键词： Bistatic spotlight SAR SPECAN algorithm

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A MTRC correction algorithm in Bistatic ISAR

A MTRC correction algorithm in Bistatic ISAR

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2009 2nd asian-pacific conference on synthetic aperture radar（apsar2009）

作者： Zhu Xiao-peng 1 Zhang Qun 1 2 Zhu Ren-fei 1 Li Hong-wei 1(1.Inst.of Telecommunication Engineering AFEU Xi’an 710077 2.Key Laboratory of Wave Scattering and Remote Sensing Information(Ministry of Education) Fudan University Shanghai 200433)

In conventional ISAR system,when the requested resolution of radar is high,while the size of target is large,it will cause the Migration Through Resolution Cell（MTRC）,it will also exist the same problems in Bistatic ISAR *** paper analyzes and discusses the reason of causing MTRC particularly in the module of Bistatic ISAR,and compares it with the situation in Mono ISAR *** then a correction algorithm based on Keystone transformation is presented in the paper,which eliminates the MTRC in the targer imaging,Finally,some simulation results are given to validate the validity of the algorithm.

关键词： Bistatic ISAR Migration Through Resolution Cell(MTRC) Keystone transformation

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An Image Co-registration Method for Wide-swath and High-resolution Spaceborne InSAR

An Image Co-registration Method for Wide-swath and High-reso...

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2009 2nd asian-pacific conference on synthetic aperture radar（apsar2009）

作者： Ping Wang Zhenfang Li Zhiyong Suo Yanyang Liu National Key Laboratory of Science and Technology on radar Signal Processing Xidian University Xi’an 710071 P.R.China

In this paper,we analyse the issue of SAR image co-registration for wide-swath and high-resolution spaceborne InSAR.A solution to this problem is proposed in which three processing procedures are ***,image co-registration pre-processing is *** are two methods for this step:one is based on InSAR orbit and radar system parameters,and the other is based on the cross-correlation information of the master and the slave ***,coarse co-registration is implemented by block ***,fine co-registration is executed in order to obtain sub-pixel co-registration *** simulation and qualitative analysis of coherence show that this method can provide accurate co-registration for wide-swath and high-resolution spaceborne InSAR,and meet the practical engineering requirement.

关键词： InSAR wide-swath high-resolution image co-registration

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Derivation of Bald Earth Digital Elevation Models with X Band Airborne InSAR

Derivation of Bald Earth Digital Elevation Models with X Ban...

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2009 2nd asian-pacific conference on synthetic aperture radar（apsar2009）

作者： Limin Jiang 1 2 3 Maosheng Xiang 1 2 1 Anational Key Laboratory of Microwave Imaging Technology Beijing China 2 Institute of Electronic Chinese Academy of Sciences Beijing China 3 Graduate University of Chinese Academy of Sciences Beijing China

Interferometric synthetic aperture radar（InSAR）is a powerful instrument for large scale acquisition of height data for bare earth as well as for vegetated areas and artificial above-ground *** many applications,the generation of a bald earth digital elevation model（DEM）is also *** paper introduces the method of generating a bald earth DEM,referred to as the hierarchical surface fitting technique [7],which operates on the digital surface models（DSM）created using the X band InSAR data provided by the Institute of Electronic,Chinese Academe *** a short description of the algorithms,the paper presents the results of this technique applied to several DSM data sets,which are accomplished by VC++program and show that this technique can remove artificial above-ground objects while retaining most of the detail of the original data.

关键词： DEM InSAR Image Pyramid hierarchical fitting

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Unsupervised Polarimetric SAR Image Classification using Fisher linear discriminant

Unsupervised Polarimetric SAR Image Classification using Fis...

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2009 2nd asian-pacific conference on synthetic aperture radar（apsar2009）

作者： Bo Chen Shuang Wang Licheng Jiao Shuang Zhang Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education of China Institute of Intelligent Information Processing Xidian University Xi’an 710071 P.R.China

How to use the POLSAR data to classify and interpret the conditions of the earth is a very important research field of *** this paper,we propose an improved algorithm on the basis of studying and analyzing some common *** technique introduces the fisher criterion in the feature selection and the hierarchical method in the classification of POLSAR image,which can improve Lee’s combination method of the unsupervised classification based on polarimetric target decomposition and the maximum likelihood classifier based on the complex Wishart *** effectiveness of this algorithm is demonstrated using a polerimetric SAR image.

关键词： radar polarimetry synthetic aperture radar feature selection terrain classification

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