结合运动补偿的波数域算法

波数域算法(简称-k算法)可以很好地解决距离向和方位向的耦合问题，从而有能力处理宽波束SAR数据。由于传统的-k算法无法跟运动补偿方法结合起来，导致图像效果往往比较差。该文对传统-k算法进行了一些改进，通过反卷积的办法将距离徙动校正和方位压缩处理分开进行，并将子孔径和自聚焦办法运用到-k算法中去，从而使-k算法更具有实用性。最后用改进的-k算法对P波段宽波束SAR的实测数据进行处理，图像质量明显提高。

A Wavenumber Domain Algorithm Integrating with the Motion Compensation

The wavenumber domain algorithm (ur-k algorithm for short) has the ability to process wide-beam SAR data because it has the ability to handle the range-azimuth coupling correctly. However, because the traditional nj-k algorithm can not integrate with the motion compensation approach, it sometimes results in bad image. Some improvement of the traditional ra-k algorithm is presented in this paper, that is, the deconvolution is used to separate the range migration correction from the azimuth compression, and then the sub-aperture and autofocus approach are applied to the ro-k algorithm, which makes the improved nj-k algorithm more practicable. At the end of this paper, a set of P-band wide-beam SAR data is processed by the improved tn-k algorithm, and the resultant image quality is obviously increased.