LFM脉压雷达间歇采样调相干扰研究  

Research on Intermittent-Sampling Jamming to LFM Pulse Compression Radar Based on Phase Modulation

作　　者：杨少奇[1] 田波[1] 

机构地区：[1]空军工程大学防空反导学院,陕西西安710051

出　　处：《计算机仿真》2016年第10期9-13,共5页Computer Simulation

基　　金：国家自然科学基金(61501500)

摘　　要：传统的脉压雷达间歇采样直接转发干扰存在两类缺点,一是次假目标幅度下降过快,导致有效假目标数量较少;二是主假目标与真实目标距离较近,导致真实目标增强。目前通过减小工作比来解决此类问题,但会增加干扰机的发射功率。针对上述缺点,提出了采用相位调制的间歇采样转发干扰,通过对雷达信号的间歇采样技术与多种相位调制方式的结合,在雷达匹配滤波输出端能够在工作比最大化的前提下增加主假目标与真实目标的距离,同时减弱了次假目标的衰减速度,减小了干扰机的发射峰值功率。推导了干扰的匹配滤波输出形式,分析了干扰参数对干扰效果的影响。通过对干扰参数的调整,能够改变有效假目标的数量和密集度,可以形成以欺骗干扰为主或压制干扰为主的干扰效果。仿真结果验证了改进方法的正确性。There exist two shortcomings in the traditional interrupted sampling repeater jamming. Firstly,the rapidly decreasing in hypo- jamming amplitude results in effective jamming number reducing; secondly,the main- jamming which is too close with target results in target strengthening. In this paper,a novel repeat jamming method was proposed based on multi phase modulation in allusion to linear frequency modulation（ LFM） pulse compression radar. By the combination of under- sampling and phase modulation,at the maximum duty,the distance between main jamming and target was augmented and hypo- jamming decay rate was lower. The output of matched filters of jamming was deduced and the effect of key parameters on the jamming effectiveness was discussed emphatically. It can give priority to deception effectiveness or suppression effectiveness by jamming parameters adjusting. Finally,the theoretical analysis was verified by the simulation results.

关 键 词：脉压雷达 间歇采样 相位调制 转发干扰 

分 类 号：TN972[电子电信—信号与信息处理]