一种FMCWSAR成像的副瓣抑制方法

A method of sidelobe suppression for FMCW SAR imaging

调频连续波合成孔径雷达(FMCW SAR)是一种新近提出来的成像雷达体制,它结合调频连续波与合成孔径成像技术,具有体积小、质量轻、成本低、分辨率高等一系列优点。在FMCW SAR成像中,由于副瓣可形成倍增的噪声,并与附近散射体产生干涉,因此,系统响应具有低副瓣是非常重要的。研究了泰勒加权对副瓣的抑制能力,并与其他加权方法进行了比较,之后给出仿真结果,证明了该方法能有效抑制FMCW SAR成像的副瓣。

The frequency modulated continuous wave synthetic aperture radar （FMCW SAR） is a newly proposed radar imaging system,which combining FMCW technique with synthetic aperture imaging methods. FMCW SAR has some advantages such as small cubage, light weight, cost-effective, high-resolution, etc. In FMCW SAR imaging, the sidelobe can form muhiplicative noise and generate interference. So the low-sidelobe system response is very important. The capability of the sidelobe suppression using Taylor weighing is researched. Several weighted methods are compared. Then the simulation results are presented. The results show that the method can validly suppress the sidelobe of FMCW SAR imaging.