聚束式合成孔径雷达系统设计中PRF的优化选取  

Optimization of PRF Selection in Spotlight SAR System Design

作　　者：许春蕾[1] 宋红军[2] 

机构地区：[1]中国科学院研究生院,北京100039 [2]中国科学院电子研究所,北京100080

出　　处：《现代雷达》2006年第5期1-4,共4页Modern Radar

摘　　要：在聚束式合成孔径雷达系统设计中,脉冲重复频率PRF的选择至关重要。在论述SAR系统设计中PRF的限制条件的基础上进一步指出,由于聚束式SAR和条带式SAR在工作模式上存在着本质的区别,两者的方位模糊度的计算方法也有所不同。文中详细地介绍了聚束式SAR的方位模糊度计算函数,阐述了聚束式合成孔径雷达PRF的选取在满足基本限制条件的基础上,可以利用其方位模糊度计算曲线进行进一步的优化。仿真结果表明,这一优化在聚束式SAR系统设计中具有重要意义。In spotlight SAR system design, PRF selection is very important. The article introduces the limitations of PRF selection and pointed that because there are essential differences between strip-map SAR and spotlight SAR, the traditional method to analyze the azimuth ambiguity in strip-map SAR does not match the situation in spotlight mode. The article introduces the calculation function of spotlight SAR in details, and expounds that in spotlight SAR system design, on the base of satisfying basic limitations, using the simulation curves of azimuth ambiguities can optimize PRF selection. Simulation results indicate that this optimization is very important for spotlight SAR system design.

关 键 词：合成孔径雷达 脉冲重复频率 距离模糊 方位模糊 

分 类 号：TN958[电子电信—信号与信息处理]