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：
多普勒调频率估计是SAR成像处理中的一个重要步骤。针对聚束、滑动聚束SAR采用全孔径算法进行成像时的调频率估计问题,该文提出一种改进的平移相关（SAC）算法。将距离Keystone变换引入到SAC算法中,去除了互相关峰值位置与目标距离间的耦合关系,从而消除了聚焦深度的限制。由于没有时域补零操作,调频率估计过程中将会出现模糊,针对此,给出了一种基于最小熵准则的模糊数估计方法。仿真及实测数据处理结果验证了所提方法的有效性。
英文摘要：
Doppler rate estimation is an essential procedure in Synthetic Aperture Radar（SAR） signal processing.For the Doppler rate estimation in spotlight and sliding spotlight SAR focused with the full-aperture imaging algorithm,this paper proposes an improved Shift-And-Correlation（SAC） approach.The range-Keystone transform is introduced into the original SAC algorithm to eliminate the coupling effect between the cross-correlation peak position and the target’s distance.Thus,the constraint of the focus depth can be avoided.Due to no zero padding in the proposed approach,aliasing will occur in the Doppler rate estimation.For this problem,an ambiguity number estimation method based on minimum entropy is presented.Finally,both simulation and results of real data are provided to demonstrate the effectiveness of the proposed approach.
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
A 2-D Space-Variant Chirp Scaling Algorithm Based on the RCM Equalization and Subband Synthesis to P
Sandglass transformation for synthetic aperture radar detection and imaging of ship at low signal-to
Experimental research of unsupervised Cameron/maximum-likelihood classification method for fully pol
Unambiguous Reconstruction and High-Resolution Imaging for Multiple-Channel SAR and Airborne Experim
期刊信息
位置：