对高重频PD雷达的舍脉冲干扰

高重频PD雷达是为解决测速模糊而在机载雷达中广泛采用的一种PD雷达工作模式,从PD雷达的特性来讲,由于带宽比较窄使得噪声干扰能量利用效率不是很高。采用DRFM精确获取雷达信号实施干扰是当前干扰的发展方向,但是对占空比接近50%的高重频PD雷达,采用对低重频PD及中重频PD可行的距离拖引,速度拖引等一系列在雷达信号脉冲串间隔内产生复杂调制的干扰方法是不合适的。主要针对高重频PD雷达重频高、占空比大的特点,提出了一种舍脉冲干扰方法,对DRFM截获的雷达信号进行快速部分转发,间隔一定脉冲数舍弃一个脉冲,改变原雷达信号的脉冲重复周期,使得在频域上产生多个速度欺骗性干扰信号,并通过仿真验证了干扰的有效性。

Jamming HPRF PD Radar Using Partial Pulse Remained Method

High pulse repetition frequency(HPRF) pulse Doppler(PD) radar is widely adopted in the air-borne radar to solve the problem of velocity ambiguity.Affected by the characteristics of PD radar,the utilization rate of noise interference energy is not high for the bandwidth of PD radar is so narrow.Digital radio frequency memory(DRFM) is the current development trend of accurate radar signal interference,but it is unfeasible to use the jamming method for the case which is complex in modulation in the intervals of the burst radar signals,such as the range gate pull-off and velocity dragging for the duty cycle near 50 percent.A partial pulse remained method for jamming HPRF PD radar is proposed after analyzing the features of PD radar which is special in its high frequency and wide duty cycle.Where the radar signal intercepted with DRFM method is transmitted partially and quickly and a pulse is discarded after certain pulses which change the original radar pulse repetition frequency,and several speed-deceptive false targets are generated.The effectiveness for jamming HPRF PD radar proves to be effective through the simulation.