摘要
针对基于数字射频存储(DRFM)技术的转发式欺骗干扰难以检测和抑制问题,该文根据DRFM的延时量化会导致干扰信号产生细微的中心频率频移及谐波分量寄生的特性,提出一种基于奇异谱分析(SSA)的抗距离波门拖引干扰方法。该方法首先提取干扰信号谐波分量与目标回波经SSA分解后奇异值能量的分布差异特征,实现对有源欺骗干扰的检测,然后依据干扰中心频率频移特性,通过划分合适的奇异值子空间重构目标信号,实现对欺骗干扰的抑制。该方法不需要估计噪声参数,在干扰检测阶段具有恒虚警特性。Monte Carlo仿真结果验证了该方法的有效性。
Countering the active deception jamming which is repeated by a Digital Radio Frequency Memory(DRFM) has been a challenging problem. Utilizing the characteristics that the Range Gate Pull Off(RGPO) jamming has a slightly different center frequency from the input radar signal and evenly spaced harmonics, a novel anti-jamming approach is proposed based on Singular Spectrum Analysis(SSA). First, the singular values energy distribution diversity between jamming harmonics and target echo, which are pretreated through SSA decomposition, is extracted for jamming detection. Then according to the center frequency diversity, a suitable subspace of singular values is divided for recovering the target echo, which means the jamming is mitigated simultaneously. The proposed approach does not need to estimate noise parameter, and has the precious property of a Constant False-Alarm Rate(CFAR) in the jamming detection stage. The validity of the proposed method is evaluated using experimental data via Monte Carlo simulation.
出处
《电子与信息学报》
EI
CSCD
北大核心
2016年第3期600-606,共7页
Journal of Electronics & Information Technology
基金
国家自然科学基金(61271297
61272281
61301284)
博士学科点科研专项基金(20110203110001)~~
关键词
抗干扰
距离波门拖引干扰
奇异谱分析
延时量化
Anti-jamming
Range Gate Pull Off(RGPO) jamming
Singular Spectrum Analysis(SSA)
Time delay quantization
作者简介
通信作者:卢云龙yllu@stu.xidian.edu.cn.卢云龙:男,1986年生,博士生,研究方向为抗干扰、雷达目标检测.
李明:男,1965年生,博士,教授,博士生导师,从事雷达图像处理与分析、宽带信号处理与微弱目标检测、高速并行信号处理、高性能DSP应用系统设计、雷达抗干扰技术等.
陈洪猛:男,1986年生,博士,研究方向为雷达成像、目标检测.
王泽玉:女,1990年生,博士,研究方向为微弱目标检测.
左磊:男,1984年生,博士,研究方向为时频分析与合成、雷达海杂波抑制、目标检测.