基于Partial FFT的间歇采样转发干扰抑制方法  

Interrupted Sampling Repeater Jamming Suppression Method Based on Partial FFT

作　　者：李欣[1] 王春阳[1] 包磊 付孝龙[1] LI Xin;WANG Chunyang;BAO Lei;FU Xiaolong(Air and Missile Defence College,Air Force Engineering University,Xi an 710051,China)

机构地区：[1]空军工程大学防空反导学院,陕西西安710051

出　　处：《探测与控制学报》2018年第6期43-49,共7页Journal of Detection & Control

摘　　要：针对现有的干扰对抗方法难以有效抑制间歇采样转发干扰的现状,提出了基于Partial FFT的间歇采样转发干扰抑制方法。该方法在分析了间歇采样转发干扰与OFDM通信系统中载波间干扰的相似性的基础上,参考OFDM通信系统中的Partial FFT解调算法,对雷达接收的信号进行分段处理,通过推导得到了分段后雷达信号和干扰信号的频谱表达式,并根据分段后的频谱特征,对每一个分段设计了干扰抑制滤波器,实现了干扰抑制。仿真结果表明,该方法对间歇采样转发干扰能够获得5～10dB的干扰抑制增益,并且经过干扰抑制后,可以大幅度降低雷达的检测代价。A method based on Partial FFT was proposed to counter interrupted sampling repeater jamming,which is an effective jamming type to linear frequency moudlation signal.By analyzing the similiarity between interrupted sampling repeater jamming and inter-carrier interference in OFDM communication system,the received signal was divided into segments according to the principle of Partial FFT method in OFDM communication system.The spectrum expression of radar signal and jamming signal after segmentation was derived respectively,and then according to the spectrum characteristics after segmentation,the jamming suppression filter for each segments was designed to suppress jamming.The simulation results show that this method can obtain 5-10 dB jamming suppression gain for interrupted sampling repeater jamming,and after jamming suppression,the detection cost of radar could be greatly reduced.

关 键 词：间歇采样转发干扰 PartialFFT 干扰抑制滤波器 检测代价 

分 类 号：TN974[电子电信—信号与信息处理]