基于正弦信号调制的灵巧干扰技术

摘要

线性调频雷达在接收信号时采用脉冲压缩处理，使传统的压制式干扰在进入雷达接收机时无法获得脉冲压缩增益，从而造成干扰效果大幅下降。针对这一问题，建立了时域卷积调制的灵巧干扰信号的数学模型，根据这一模型设计了基于非完全正弦函数卷积调制的灵巧干扰信号，来实现对线性调频信号的干扰，对这一干扰信号的干扰效果进行了仿真分析。仿真结果表明：这一干扰信号可以产生假目标群来实现对一定距离单元的遮盖性干扰，并能利用脉冲压缩时旁瓣的非线性叠加覆盖真实目标回波，解决了卷积干扰信号滞后于真实目标回波的缺陷。%Aimed at a decline in interference effect,a smart noise mathematical model is buit up based on si-nusoidal modulation in accordance with convolution modulation in the time domain,and then a smart noise j amming is designed based on incomplete sinusoidal convolution modulation to realize interference with lin-ear frequency modulation signal.The result of simulation shows that the interference signals can produce false targets group to cover the real echo signals of a certain distance unit,which can also be easily covered by the nonlinear superposition sidelobe.By so doing,the defect of convolution j amming signal being behind the real target echo is overcomed.