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星载SAR的多普勒中心频率估计的新探索
A NEW STUDY FOR THE DOPPLER CENTROID FREQUENCY ESTIMATE FROM THE SAR ECHOES
【摘要】 本文对几种经典的多普勒中心频率估计算法的从滤波的角度加以分析,分析了符号相关算法的实质,并提出一种了简单适用的非线性滤波方法,对雷达回波方位功率谱周期图进行平滑,在满足成象要求下,可以快速估计出多普勒中心频率。
【Abstract】 Different approaches of the Doppler Centroid Estimation from the SAR echoes are compared.The Sign Correlation Estimate(SDE)is discussed in detail.A nonlinear filtering method is put forword to reduce the influctuation of nonhomogeneous scence and fade in echoes,It yield a fast algorithm and an adequate accurate estimate result.
- 【文献出处】 宇航学报 ,JOURNAL OF ASTRONAUTICS , 编辑部邮箱 ,1994年01期
- 【分类号】TN959.6
- 【被引频次】7
- 【下载频次】213