宽带LFM信号的子带脉冲干扰技术

宽带线性调频信号具有高的处理增益,与信号不相关的噪声干扰难以奏效,而利用全脉冲信息形成的应答式延迟转发干扰或移频干扰虽然具有与雷达信号极高的相关性,并能得到很高的处理增益,但需要雷达信号的精确参数,且最少延迟目标回波一个脉冲宽度,在大脉宽情况下容易造成干扰失效。为此,提出了子带脉冲相关干扰技术,利用部分相干的子带脉冲干扰信号可以获得一定的处理增益,同时有降低了干扰延迟时间。理论分析和仿真试验都说明该方法可以对宽带LFM信号形成有效的干扰,具有较好的应用前景。

Jamming Wideband LFM Signal with Sub-band Pulse

It is very difficult to jamming the wide band LFM signal with incoherent noise beeause of the very high processing gain of the radar signal. The repeated jamming of both time delaying and frequency shifting need the information of the full pulse. In this way, the jamming signal will lag the echo at least one pulse wide. The jam will ineffective when the pulse wide is large enough. Here a novel method is brought forward which jamming the wide band LFM signal with a subband pulse jamming signal. The novel method can get a proportional gain and at the same time reduce the time delay of the jamming signal. The analysis and the simulation both proved the novel method can jam the LFM signal effectively.