基于ACMD与频谱感知的铁路无线通信阻塞干扰识别方法  

Identification Method of Blocking Interference for Railway Wireless Communication Based on ACMD and Spectrum Sensing

作　　者：酒昀洋 刘金朝 孟景辉 杨树忠 李润雷 段贺辉 JIU Yunyang;LIU Jinzhao;MENG Jinghui;YANG Shuzhong;LI Runlei;DUAN Hehui(Postgraduate Department,China Academy of Railway Sciences,Beijing 100081,China;Infrastructure Inspection Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;INMAI Railway Technology Co.,Ltd.,Beijing 100081,China)

机构地区：[1]中国铁道科学研究院研究生部,北京100081 [2]中国铁道科学研究院集团有限公司基础设施检测研究所,北京100081 [3]北京铁科英迈技术有限公司,北京100081

出　　处：《铁道学报》2025年第1期82-90,共9页Journal of the China Railway Society

基　　金：中国国家铁路集团有限公司科技研究开发计划(K2021T015)。

摘　　要：针对公众无线网对铁路专用无线网造成阻塞干扰的问题,基于实时频谱动态检测数据,提出一种基于自适应啁啾模态分解(ACMD)和频谱感知的阻塞干扰自动识别方法。采用阈值法和能量重心法,实现三维图像数据降维,提取频谱包络和密度脊线等二维波形。利用ACMD对包络曲线进行模态分解,降低原始波形的非平稳性,再基于曲线特征进行频段划分和频段信号分类。通过频谱感知算法识别阻塞干扰并判断造成干扰的信号类型及其频率信息。实验结果表明:本文所提方法能够自动识别公众无线网对铁路专用无线网造成的阻塞干扰,并准确判断干扰信号带宽类型,同时检测出干扰信号和被干扰信号的频率值或频率范围,有效提高阻塞干扰的检出效率。In response to the problem of blocking interference caused by public wireless networks on railway wireless communication networks,this paper proposed an automatic identification method for blocking interference for railway wireless communication based on real⁃time spectrum dynamic inspection data,combining adaptive chirp mode decompo⁃sition(ACMD)and spectrum sensing.Data dimensionality reduction was achieved using thresholding and energy centroid methods to extract 2D waveforms such as spectral envelope and density ridge from original 3D image data.AC⁃MD was used as mode decomposer on the envelope waveform to reduce the non⁃stationarity nature of the original wave⁃form.Frequency band division and signal classification were carried out based on waveform features.The spectrum sens⁃ing algorithm was used to identify blocking interference,and accurately determine the type of blocking signal and its fre⁃quency information.The results show that the proposed method can automatically identify blocking interference caused by public wireless networks on railway wireless communication networks,accurately determine the bandwidth type of inter⁃fering signal,and detect the frequency value or range of the interfering and interfered signals,effectively improving the efficiency of blocking interference detection.

关 键 词：铁路无线通信 动态检测 阻塞干扰 自适应啁啾模态分解 频谱感知 

分 类 号：U285[交通运输工程—交通信息工程及控制]