一种SAR分布目标可分辨概率精确计算方法

A Precise Method for Calculating the Resolution of SAR Distribution Targets

可分辨概率是用来衡量SAR分布目标分辨特性的重要指标。该文在细化目标可分辨条件的基础上,结合SAR分布目标统计特性,提出一种新的目标可分辨判断准则,给出一种可分辨概率精确计算方法。同时为了简化计算,给出计算复杂度更小的近似计算方法。仿真结果表明,该文提出的可分辨概率计算方法符合实际情况,能够更真实地反映SAR分布目标统计特性对分辨特性的影响,可为SAR图像质量评估和系统参数设计等提供理论支撑。

The separable probability is a significant criterion to evaluate the resolution characteristics of SAR distribution targets. On the basis of refining the separable condition of targets and taking the statistic characteristic of SAR distribution targets into consideration, a new separable judgment criterion for targets is proposed, and a precise calculation method of the separable probability is deduced. Besides, in order to simplify the calculation, the approximate calculation method with less computational complexity is presented. It is shown in the simulation results that the proposed method is in accordance with the actual situation, which and reflect the effect of the statistic characteristic of SAR distribution target on the resolution characteristic, and can provide theoretical support for the SAR image quality evaluation and system parameter design.