间歇采样延时叠加干扰在雷达对抗领域有着广泛的应用。为形成尽量密集的假目标干扰效果,针对线性调频信号,对间歇采样延时叠加干扰时序设计进行了研究。分析了间歇采样信号形成主次假目标的幅度、相位和位置关系,结合恒虚警检测原理,提出了两种密集假目标干扰策略。一种可以使各主假目标和次假目标都能被检测到;另一种使主假目标和相邻次假目标位置重合,相位相同,同相叠加以增强干扰效果。仿真表明:干扰参数设计不当会导致无法达到预期干扰效果,通过合理设计参数及相位控制,可利用较少的资源取得好的密集假目标干扰效果。

Interrupted sampling interference with time-delay superposition has wide applications in the field of radar countermeasure. Linear frequency modulation signal is discussed in order to get better dense false targets jamming effect and the design methods of jamming time sequence are studied. The interrupted sampling signal can generate primary and secondary false targets, their amplitude, the relationship of phase and position are studied, two kinds of jamming strategies of dense false targets are proposed combined with constant false alarm detection rule. Both primary and secondary false targets can be detected for the first strategy; for the second one, the positions of primary false targets overlap with neighboring secondary false targets, and they are in the same phase, so the jamming effect is enhanced because of in-phase superposition. Simulation shows that expected jamming effect can not be achieved because of the inappropriate jamming parameters, and better dense false targets jamming effect can be gotton with less resources by designing parameters appropriately and controlling the phase.

TN972

武器装备军内科研科学研究项目