基于频域中值滤波的自适应卫星通信恶意干扰检测  

Adaptive Detection of Malicious Jammers Based on Medium Filtering in Frequency Domain for Satellite Communication

作　　者：刘建成 郝学坤[2] 王赛宇 王超[3] 姜少飞[3] LIU Jiancheng;HAO Xuekun;WANG Saiyu;WANG Chao;JIANG Shaofei(The 54th Research Institute of CETC,Shijiazhuang 050081,China;The 50th Research Institute of CETC,Shanghai 200331,China;Unit 31634 of PLA,Kunming 650217,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]中国电子科技集团公司第五十研究所,上海200331 [3]中国人民解放军31634部队,云南昆明611731

出　　处：《无线电通信技术》2020年第3期339-344,共6页Radio Communications Technology

基　　金：河北省博士后择优资助项目(B2019003033)。

摘　　要：卫星通信在军事领域的应用不可避免地面临人为实施的恶意干扰,针对接收信号的恶意干扰检测问题,提出了基于频域中值滤波的门限自适应调整检测方法。首先对接收的混合信号进行FFT变换,在此基础上对得到的序列进行中值平滑滤波,进而通过滤波输出序列计算判决门限,最后将序列最大值与门限对比,判断是否存在干扰。理论分析和仿真表明,该方法计算简单、易实现,对窄带和部分频带干扰具有优越的检测性能。The malicious jammers are inevitable in military application of satellite communication.Given the malicious jammer detection for received signals,the detection method based on adaptive threshold adjusting via frequency medium filtering is proposed in this paper.Firstly,the mixed received signal is operated by FFT,and then the transformed sequence is passed through medium filter.Secondly,the detection threshold is achieved by the output of medium filter,which is compared with the max value of transformed sequence to decide whether there is a jammer or not.Theoretical analysis and simulations indicate that the proposed detection method is less complicated and simple to implement,providing superior detection performance for narrow band and partial band jammers.

关 键 词：恶意干扰 干扰检测 频域中值滤波 门限调整 

分 类 号：TN961[电子电信—信号与信息处理]