基于数字对消的跟踪干扰抑制方法  

Follower jamming suppression method via digital cancellation

作　　者：范新峰 谭志良 FAN Xinfeng;TAN Zhiliang(National Key Lab on Electromagnetic Environment Eff ects,Shijiazhuang Campus of Army Engineering University,Shijiazhuang 050003,China)

机构地区：[1]陆军工程大学石家庄校区电磁环境效应国家级重点实验室,河北石家庄050003

出　　处：《系统工程与电子技术》2020年第6期1235-1240,共6页Systems Engineering and Electronics

基　　金：国防科技重点实验室基金(9140C87030413JB34001)资助课题。

摘　　要：抗跟踪干扰已逐渐成为跳频通信中的研究热点和难点。针对跳频通信抗跟踪干扰难以实现的问题,采用数字对消方法实现跟踪干扰抑制。首先,基于跟踪干扰信号特点及战术背景,提出跟踪干扰信号估计方法,完成数字对消中参考信号的提取;然后,将干扰信号与混合信号进行对消完成干扰抑制;最后,基于现场可编程门阵列(field programmable gate array,FPGA)开发板,搭建了半实物仿真实验平台。实验结果表明,所提方法能够有效抑制跟踪干扰。对于不同的干扰频点,信干比(signal to interference ratio,SIR)提升不同,干扰抑制效果受干扰信号强度的影响。当干扰信号方差σ^2w在0.75~1.5时,SIR提升的平均值能达到10dB,当σ^2w=0.25或2时,则小于8dB。Auti-follower jamming becomes a hot and difficult topic in frequency hopping(FH)communications.In order to solve the difficult problem of FH communications in achieving anti-follower jamming,this paper uses the digital cancellation method to mitigate follower jamming.According to the characteristics of follower jamming signals and tactics background,a method to estimate follower jamming signals is proposed to extract reference signals in digital cancellation.And then,a further cancellation about jamming signal and mixed signals is conducted to mitigate follower jamming signals.Finally,a hardware-in-the-loop simulation platform is built by using field programmable gate array(FPGA).Experiment results show that the proposed method is effective to mitigate follower jamming.Signal-to-interference ratio(SIR)promotion degrees are different with different jamming frequencies,and the jamming mitigation performance is affected by the interference intensity.The SIR promotion average can reach 10 dB when the variance of jamming signals varies from 0.75 to 1.5.When the variance is 0.25 or 2,the SIR promotion average is less than 8 dB.

关 键 词：跟踪干扰 数字对消 信号估计 仿真验证 

分 类 号：TN975[电子电信—信号与信息处理]