杂波对空中平台侦察的影响分析

An Impact Analysis of Clutter on Reconnaissance Using Aerial Platforms

为从功率角度说明杂波对空中侦察设备的影响,提出一种新的杂波功率计算方法,该方法将杂波功率计算从单散射块的简单模型扩展到全向散射空间的精确模型。首先,选取合适的杂波后向散射系数模型;其次,构建空中平台与机载雷达的几何模型,详细地推导了等距离环数学表达式,在考虑距离模糊情况下推导了杂波功率数学表达式;最后,仿真结果表明:该方法比文献杂波功率计算方法更加准确,从功率角度说明了杂波对侦察的影响,为后面研究杂波抑制奠定了基础。

This thesis attempts to propose a new algorithm of clutter power and proceeds to analyze the impact of clutters on reconnaissance equipments from the perspective of power. Calculation of clutter power is extended to the accurate model of the omnidirectional scattering space from the simple model of the single scattering block. First,the authors of the present thesis select an appropriate backscattering coefficient model of clutters. Then,the geometric model of aerial platform and airborne radar is constructed. Afterwards,the mathematical expressions of the equal-distance ring are derived. The mathematical expressions of clutter power in the case of range ambiguity is derived. The simulation results show that the algorithm proposed in the present thesis is superior to previous ones. This thesis analyzes the impact of clutters on reconnaissance from the perspective of power. The conclusion of this thesis paves way for the further study of clutter suppression.