关于圆周合成孔径雷达目标成像质量优化仿真  

The Optimization Simulation of Quality Imaging about the Circular Synthetic Aperture Radar Target

作　　者：张月 李斌兵[1] 宋德鹏 ZHANG Yue;LI Bin-bing;SONG De-peng(Information Engineering Department, Engineering College of CAPF, Xi＇ an Shanxi 710086, China)

机构地区：[1]武警工程大学信息工程系,陕西西安710086

出　　处：《计算机仿真》2017年第11期7-11,共5页Computer Simulation

基　　金：国家自然科学基金项目(41171224)

摘　　要：为了合成孔径雷达能够360°全方位获取信息实现三维成像,针对调频连续波圆周合成孔径雷达(Frequency Modulation Continue Wave Circular Synthetic Aperture Radar,FMCW CSAR)特殊的圆对称谱,普通加窗处理后对圆环对称谱展宽了主瓣宽度且旁瓣未有明显抑制的问题,提出了利用空间变迹法(Spatially Variant Apodization,SVA)不断调整窗函数系数,使其自动适应信息的需要,最终达到在保持主瓣宽度不变的情况下压低旁瓣的效果,进一步提高成像分辨率。最后将改进后的算法与加窗方法做了对比仿真处理,通过仿真证明,上述算法能够有效抑制圆周合成孔径雷达成像的旁瓣。In order to improve the target imaging quality for special circular symmetry spectrum of Frequency Mod- ulation Continue Wave Circular Synthetic Aperture Radar （FMCW CSAR）, an optimization algorithm is put forward by using SVA （Spatially Variant Apodization） to adjust window function. This algorithm achieves the effect of side- lobe suppression when the main-lobe width is unchanged, which improves the imaging resolution. Finally, the pro- posed algorithm is simulated and compared with the traditional windowing algorithm. Simulation results show that the proposed algorithm can effectively restrain the sidelobe of circular synthetic aperture radar.

关 键 词：圆周合成孔径雷达 空间变迹法 旁瓣抑制 

分 类 号：TN955[电子电信—信号与信息处理]