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    • 2. 发明公开
    • WAVELET DOMAIN INSAR INTERFEROMETRIC PHASE FILTERING METHOD IN COMBINATION WITH LOCAL FREQUENCY ESTIMATION
    • 结合局部频率估计的小波域干涉干涉相位滤波法
    • EP3229038A1
    • 2017-10-11
    • EP15865192.7
    • 2015-09-08
    • Institute of Electronics, Chinese Academy of Sciences
    • DING, ChibiaoLI, FangfangLEI, BinLIN, XueHU, DonghuiQIU, Xiaolan
    • G01S7/02
    • G01S13/9023
    • The present disclosure provides a method for InSAR interferometric phase filtering in a wavelet domain in conjunction with local frequency estimation. The method for InSAR interferometric phase filtering in a wavelet domain enables distinction of the useful information sub-bands from the noise sub-bands in the wavelet coefficients of the complex interferometric phase by using the local frequency estimation. With characteristics of the good noise removal performance for the general threshold shrinkage method and the strong detail maintenance capability for the neighborhood threshold shrinkage method, respectively, the neighborhood threshold shrinkage is performed on the wavelet coefficients of the sub-bands in which the useful information is located, while the general threshold shrinkage is performed on the wavelet coefficients of other sub-bands. In this way, the noise may be removed as much as possible, while the detail information of the interferometric fringes may be kept from being destroyed, thereby achieving a highly accurate interferometric phase filtering and providing foundations for the highly accurate interferometric measurement.
    • 本公开提供了一种用于结合本地频率估计的小波域中的InSAR干涉相位滤波的方法。 用于小波域中的InSAR干涉相位滤波的方法使得能够通过使用本地频率估计来区分来自复合干涉相位的小波系数中的噪声子带的有用信息子带。 针对一般阈值收缩方法具有良好的噪声去除性能和邻域阈值收缩方法具有较强的细节维护能力的特点,对有用信息为子带的小波系数进行邻域阈值收缩 定位,而对其他子带的小波系数执行一般阈值缩小。 以这种方式,尽可能多地去除噪声,同时可以防止干涉条纹的细节信息被破坏,由此实现高度精确的干涉相位滤波并且为高精度干涉测量提供基础。
    • 4. 发明公开
    • Inversion method and apparatus based on polarimetric interferometric synthetic aperture radar
    • 根据一个极化干涉合成孔径雷达反转处理和设备
    • EP2784537A1
    • 2014-10-01
    • EP14162311.6
    • 2014-03-28
    • Institute of Electronics, Chinese Academy of Sciences
    • Deng, YunkaiXu, LiyingWang, YuWang, ChuncleYu, WeidongZhang, ZhiminZhao, FengjunNi, Jiang
    • G01S13/90
    • G01S13/9023G01S13/9035G01S2013/9076
    • An inversion method based on Polarimetric Interferometric Synthetic Aperture Radar (PoLInSAR) is provided, which includes: acquiring a set of PoLInSAR image data of an object to be measured, and performing line fitting on a correlation coefficient estimation value acquired from the PoLInSAR image data by using total least squares to determine a ground surface phase estimation value of the object to be measured; acquiring a volume scattering decorrelation coefficient through a correlation regional boundary acquired from the PoLInSAR image data and a fitted line; performing inversion on the object to be measured by establishing a lookup table to acquire an inversion parameter of the object to be measured as a parameter estimation value of the object to be measured. An inversion apparatus based on Polarimetric Interferometric Synthetic Aperture Radar (PoLInSAR) is provided accordingly. By adopting technical solutions of the disclosure, inversion precision can be improved, and the technical solutions of the disclosure are particularly applicable to the inversion of a forest parameter.
    • 提供了一种基于极化干涉合成孔径雷达(极化干涉SAR)的反转方法,该方法包括:获取一组对象的极化干涉SAR图像数据的要被测量,并通过由PoLInSAR的imageData中获取的相关系数估计值进行直线拟合 利用整体最小二乘确定性矿对象的地表相位估计值被测量; 获取体积通过由PoLInSAR图像数据和拟合线获取的相关区域边界散射去相关系数; 在对象上执行反通过建立的查找表以获取在所述物体的反转参数被测定作为对象的参数估计值进行测量来测量。 相应地提供了一种基于极化干涉合成孔径雷达(极化干涉SAR)的反转装置。 通过采用本发明的技术方案,反演精度可以得到改善,并且本公开的技术方案是特别适用于森林参数的反转。
    • 6. 发明公开
    • SAR RADAR SYSTEM
    • SAR雷达系统
    • EP2359159A1
    • 2011-08-24
    • EP08878158.8
    • 2008-11-11
    • Saab AB
    • HELLSTEN, Hans
    • G01S13/90
    • G01S13/9029G01S13/72G01S13/9017G01S13/9023
    • The invention provides a method for detecting targets comprising moving and stationary targets with a radar system equipped with Synthetic Aperture Radar, SAR, on board a SAR platform, comprising navigation equipment for accurate determination of the position of the SAR platform. The SAR platform is transversing a stationary ground region and targets in the said ground region, in which the SAR platform obtains radar data by means of at least one antenna. The radar system further comprises a SAR processor recording the radar data and the position of the antenna or antennas for each transmitted radar pulse. Wherein radar data within synthetic sub-apertures, are : successively merged in Niteration steps into SAR images of increasing resolution of the surveyed region and where each iteration step consists of forming a new SAR image at a new iteration level by a linear combination of neighbouring SAR images in the previous iteration step. The invention also provides a corresponding radar system and a SAR processor is further used for calculating the detection and positioning of targets comprising moving and stationary targets.