FDA-SAR高分辨宽测绘带成像距离解模糊方法

由于多普勒模糊和距离模糊的制约，星载合成孔径雷达（SAR）成像方位高分辨率和宽测绘带成像之间存在严重的矛盾.针对这一问题，该文提出了基于频率分集阵列（FDA）SAR系统的高分辨宽测绘带成像距离解模糊方法.该方法基于FDA的距离维可控自由度，利用FDA发射导向矢量的距离和角度二维依赖性，在空间频率域实现距离模糊回波的分离并对不同距离模糊区域分别进行成像处理，解决了星载SAR成像测绘带宽对方位高分辨率的制约问题.仿真实验验证了所提方法的正确性和有效性.

Range Ambiguity Resolving Method for High-Resolution and Wide-Swath Imaging with FDA-SAR

In space-borne synthetic aperture radar (SAR),severe conflicts exists between azimuth high resolution and wide swath due to Doppler and range ambiguity.To solve this problem,a range ambiguity resolving method for high-resolution and wide-swath (HRWS) imaging with frequency diversity array (FDA) SAR is proposed in this paper.Based on the extra degrees-of-freedom in range domain,FDA is capable of distinguishing the range ambiguous signal in spatial frequency domain.The proposed method first separates the range ambiguous signal in spatial frequency domain,and then performs imaging processing separately on different range ambiguous region to achieve HRWS imaging.Simulation results validate the effectiveness of the proposed method.