电子通信突变非线性多频干扰检测方法  

Nonlinear Multi-Frequency Interference Detection Methods for Electronic Communication Mutations

作　　者：孔婷 蒋欣欣 张婕[2] KONG Ting;IANG Xin-xin;ZHANG Jie(School of Mathematics and Computer Science,Yuzhang Normal University,Nanchang Jiangxi 330103,China;School of Computer Information Engineering,Jiangxi Normal University,Nanchang Jiangxi 330227,China)

机构地区：[1]豫章师范学院数学与计算机学院,江西南昌330103 [2]江西师范大学计算机信息工程学院,江西南昌330227

出　　处：《计算机仿真》2024年第3期154-157,303,共5页Computer Simulation

基　　金：江西省教育厅科学技术研究项目(GJJ191213)。

摘　　要：电子通信中同频段窄带信号通常含有多种不同频谱的非线性信号,对通信造成突发性干扰。此类非线性信号干扰的多频段表现性强且特征种类多,检测难度较大。为此提出一种考虑动态特征的突变非线性多频干扰检测方法。构建电子通信模型,采集信号样本,根据时域逐步增加的关系完成信号的扩频。计算扩频前和扩频后的幅度差值,根据信号跟随时间变化的递推关系推导出每个源点区域的实时状态特征。采用DFT多级模型按照特征大小顺序逐一检测,若信号超过门限值,则输入到下一级检测层中;若信号低于门限值,直接输出非线性多频干扰检测结果。实验证明:研究方法能够高精度检测电子通信突变非线性多频干扰的时域和频域幅值,说明上述方法的应用性能更好,研究价值较高。In electronic communication,the narrow-band signals in the same frequency band usually contain a variety of nonlinear signals with different frequency spectrums,causing sudden interference to communication.Therefore,a method for detecting abrupt nonlinear multi-frequency interference based on dynamic characteristics was proposed.Firstly,we built an electronic communication model to collect signal samples,and thus to complete the spread spectrum of signal according to the increasing relationship in the time domain.Secondly,the amplitude difference before and after the spread spectrum was calculated.Thirdly,the real-time state characteristics of the source area were deduced according to the recursive relationship that the signal changed with time.Moreover,the DFT multilevel model was used to detect features in order.If the signal exceeded the threshold value,it was input to the next layer.If the signal was lower than the threshold value,the detection result of nonlinear multi-frequency interference was output directly.The experiment shows that the proposed method can detect the amplitude of abrupt nonlinear multi-frequency interference in the time domain and frequency domain accurately,and has better application performance as well as research value.

关 键 词：电子通信 突变非线性 递推关系 多级模型 多频干扰检测 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论]