摘要
针对欺骗干扰环境中的线性调频(linear frequency modulation,LFM)雷达干扰抑制问题,提出了一种动态环境下性能较好的数字射频存储器(digital radio frequency memory,DRFM)假目标干扰抑制方法。该方法通过自适应滤波从时-频解耦后的信号中估计出干扰信号并对干扰信号进行对消,从而恢复出目标回波信号。该方法无需进行干扰环境下的多分量信号参数估计,运算复杂度低。仿真结果表明,在干扰与目标信号之间的时延差大于0.2μs的情况下,对干扰信号的脉压峰值功率抑制可达50 dB以上,而目标信号脉压峰值功率损失小于1 dB,且算法对干信比不敏感。
This paper presents an adaptive cancellation method to counter the digital radio frequency memory（DRFM） repeat false target in a dynamic situation.With a special reference signal,the echo and the false target signal can be fully separated by applying the stretch processing.Thus,an adaptive notch filtering technique is utilized to estimate the jamming signal,and a cancellation approach is performed to suppress the false target component.This approach does not require parameter estimation of multi-component signals and the computation burden is reduced.Simulations are given to show the effectiveness of the approach.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2011年第8期1760-1764,共5页
Systems Engineering and Electronics
基金
军事电子预研项目资助课题
关键词
电子反对抗
干扰对消
自适应滤波
数字射频存储器
electronic counter-countermeasure（ECCM）
jamming cancellation
adaptive filtering
digital radio frequency memory（DRFM）
