欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
针对三维地面场景合成孔径雷达回波仿真中存在计算量巨大的问题，提出了一种基于图形处理单元的合成孔径雷达回波快速仿真方法．首先，采用分形布朗运动模型对数字高程模型数据进行分形插值处理；再对插值后的数据进行小面元剖分并计算了剖分后小面元的后向散射系数；接着利用改进的下视角比较法对三维场景的阴影遮挡进行快速判断；最后详细分析了回波仿真过程中的3个并行层次，设计了核函数，并利用线程外推和归约相加的计算方法，实现了图形处理单元编程架构下三维场景合成孔径雷达回波的快速仿真．利用这种方法对实测数字高程模型数据进行了回波仿真和成像处理，验证了该方法的正确性和高效性．
英文摘要：
Due to huge calculation of SAR echo simulation of a three-dimensional （3D） ground scene, a fast simulation method is proposed. First, the data of a 3D ground scene are fractionally interpolated based on the Fractional Brownian Motion （FBM） model. Second, the data interpolated are divided into lots of small facets whose precision meets the simulation requirement, the backscattering coefficients of the small facets are calculated. Third, the shaded area is judged by the comparison method of overlook angles. Three parallel levels are analyzed and the kernel function is designed. Finally, the computing method of reduction adding and external thread are also utilized under the framework of GPU in order to get high efficiency. With the methods mentioned above, the imaging result of experimental DEM data verifies the validity and superiority of the proposed method.
同期刊论文项目
同项目期刊论文
Robust Clutter Suppression and Moving Target Imaging Approach for Multichannel in Azimuth High-Resol
A novel modified Omega-K algorithm for circular trajectory scanning SAR imaging using series reversi
Interesting components detection for space satellites from inverse synthetic aperture radar image vi
High-resolution inverse synthetic aperture radar imaging of manoeuvring targets with sparse aperture
An Azimuth Frequency Non-Linear Chirp Scaling (FNCS) Algorithm for TOPS SAR Imaging With High Squint
Imaging algorithm for circular trace scanning synthetic aperture radar using modified hyperbolic ran
Sparse Regularization of Interferometric Phase and Amplitude for InSAR Image Formation Based on Baye
A Novel Moving Target Imaging Algorithm for HRWS SAR Based on Local Maximum-Likelihood Minimum Entro
Azimuth Resampling Processing for Highly Squinted Synthetic Aperture Radar Imaging With Several Mode
Multichannel HRWS SAR Imaging Based on Range-Variant Channel Calibration and Multi-Doppler-Direction
期刊信息
位置：