海面背景下弱目标RCS估计及特性分析

雷达截面积(radar cross section, RCS)可以为武器装备设计提供支撑。因此,许多国家都建立了标准测试场,可以满足大多数目标RCS测量的需要。对于海面背景下的非合作弱目标而言,只能依赖实际测试来获取目标RCS,但有时会面临多径干扰和信号弱的问题。针对该问题,在海上外定标和目标信杂比改善基础上,提出了一种目标RCS估计方法。设计并开展了海上目标RCS测量试验,并对测试数据进行了分析,验证了新方法的有效性,同时给出了弱目标RCS起伏特性的定性描述。

RCS estimation and characteristic analysis of weak target under sea background

The radar cross section(RCS) can provide a support for the design of weapons. Therefore, standard test sites have been established by many countries for the needs of most target RCS measurements. In terms of the non-cooperative weak target in a sea background, it can only rely on actual tests to obtain the target RCS for the problems of multipath interference and weak signal. In response to the current problem, a target RCS estimation method is proposed based on the offshore external calibration and the signal to clutter ratio improvement of the target. Meanwhile, an RCS experiment is designed and carried out on the sea surface. From the analysis of the measured RCS data, the results verify the effectiveness of the new method. Moreover, a qualitative description on the fluctuation characteristics of weak target RCS based on the coherent accumulation gain is given.