SAR非均匀采样信号频谱重构

在常规星载SAR系统中,测绘带宽和分辨率之间存在矛盾,采用方位向多相位中心多波束模式可以很好地解决这个问题。但在方位向多相位中心多波束SAR系统中,要想实现宽幅成像,其方位向上回波的采样时刻大多是不均匀的。文中主要分析和研究如何重构非均匀采样信号的频谱。非均匀采样信号频谱重构的仿真结果证明了该重构算法的正确性。

Reconstruction of Digital Spectrum of Nonuniformly Sampled Signals with SAR

The confliction between swath width and resolution can be solved by Displaced Phase Centers multibeam in Azimuth in the routine spaceborne SAR,but the nonuniformly sampled echo signals in azimuth are usually obtained if we want to image a wide swath.In this paper the reconstruction of digital spectrum from nonuniformly sampled signal is discussed and simulations are used to illustrate the reconstruction method and its correctness.