一种新的基于点目标的SAR成像质量评估方法  

Research on a New SAR Imaging Quality Evaluation Method Based on Point Target

作　　者：陆洪涛 汤博 范江涛 

机构地区：[1]63891部队

出　　处：《战术导弹技术》2013年第5期31-34,48,共5页Tactical Missile Technology

摘　　要：针对基于点目标的SAR成像质量传统评估方法中强目标会影响评估结果这一问题,研究了图像对比度、IRW(冲激响应的3dB主瓣宽度)、多普勒调频率三者对应关系,提出了一种SAR成像质量指标的推算方法,实现了从有强目标场景到无强目标场景相关图像指标的等效推算,大大减小了强目标对评估结果的影响。Aiming to the problem that the strong target will affect the evaluation result by using traditional SAR imaging quality evaluate algorithm based on point target, the relationship among image contrast, IRW and Doppler rate is analyzed. A new SAR imaging quality evaluation method is put forward, and equivalent calculation about image index is achieved when strong target is existent or not. The results show that the influence of strong target in evaluation result is reduced.

关 键 词：SAR成像质量评估 多普勒调频率 自聚焦算法 图像对比度 

分 类 号：TN957.52[电子电信—信号与信息处理]