弹载相控阵高重频阶梯变频雷达主瓣干扰抑制

针对弹载高重频阶梯变频雷达、相控阵单脉冲测角体制以及主瓣内干扰源数目为2的情况,提出了一种干扰抑制方法以及干扰背景中的目标角度参数估计方法.该方法在修正的方位俯仰坐标系上进行波束形成,实现了方向图函数在方位、俯仰方向上的可分离性;在各子阵输出信号的基础上利用数字处理形成和通道、方位差通道、俯仰差通道、其他辅助通道等8个独立的通道;采用多通道相关对消技术形成修正的和、差通道,在抑制干扰的同时保持单脉冲比不变.理论分析及仿真结果证实了该方法的有效性.

Main-lobe Jamming Suppression for Missile-borne Phased Array High-Repetition Stepped Frequency Radar

Aiming at the case of two jamming sources, a new method of main-lobe jamming suppression and target angle parameter estimation was presented for missile-borne mono-pulse high-repetition stepped-frequency radar application. In this method, beam-forming in modified azimuth-elevation coordinate system was done in order to obtain separable pattern function; eight channels, including sum, azimuth-difference, elevation-difference and other auxiliary channels, were constructed by the use of digital processing of sub-array output signals; and modified sum channels and modified difference channels were formed by using multi-channel cancellation technology. This method can suppress main-lobe jamming and meanwhile preserve undistorted mono-pulse ratio. Theoretical analysis and simulation results have proved its effectiveness.