超宽带虚拟孔径雷达非正交旁瓣抑制方法

Non-orthogonal Sidelobes Reduction for Virtual Aperture UWB Radar

在超宽带雷达成像中,雷达图像存在非正交旁瓣,影响图像质量。该文通过分析虚拟孔径成像的空间谱支撑区分布与点扩展函数的关系,提出一种基于虚拟子孔径的雷达图像非正交旁瓣抑制方法。该方法通过分离主瓣和旁瓣,在保持分辨率的同时有效抑制旁瓣,仿真数据处理结果验证了该文方法的有效性。

In ultra-wideband radar imaging applications, there exist non-orthogonal sidelobes which would affect the image. The relationship between point spread function and spatial spectrum supporting region is analyzed in this paper. To improve the image quality, an approach based on virtual sub-aperture radar images is proposed to reduce the non-orthogonal sidelobes. This approach separates the mainlobe from the sidelobes, which suppresses the sidelobes and keeps the mainlobe simultaneously. The simulation results show significant reduction of the sidelobe level.