基于Radon变换的宽带信号多域参数同时测量方法  

A simultaneous measurement method of multi-domain parameters for wideband signals based on Radon transform

作　　者：于涵 唐莽[1] 刘建[1] 曹霄 鲍成浩[1] Yu Han;Tang Mang;Liu Jian;Cao Xiao;Bao Chenghao(No.8511 Research Institute of CASIC,Nanjing 210007,Jiangsu,China)

机构地区：[1]中国航天科工集团8511研究所,江苏南京210007

出　　处：《航天电子对抗》2024年第3期54-58,共5页Aerospace Electronic Warfare

摘　　要：实际电子监测设备的作战环境复杂多变,辐射源个数、工作频率、工作带宽、到达角度等多域参数信息对于实现工作场景的实时精确感知至关重要。提出一种基于Radon变换的宽带信号多域参数同时测量方法,实现多个宽带信号多域重点工作参数的同时快速测量,大大提升低信噪比条件下监测目标特性的多维实时感知能力。该方法结合数字信道化结构及二重FFT算法实现全侦收频段及全侦收角度的空时域联合功率聚焦,并生成作战场景的空时二维频谱幅度图,利用Radon变换算法实现不同映射角度的线性积分运算,构建合适的检测门限,推导计算全场景多目标多参数测量结果。实验显示,该方法可以有效提升弱信号的参数测量精度,实现多目标多域参数同时测量。The realistic operational environment for electronic monitoring equipment changes complicatedly,and multi-domain parameters,including the number of radiation sources,the working frequency,the working bandwidth,and the direction of arrival,are important for realizing real-time and accurate perception of working scene.A simultaneous measurement method of multi-domain parameters for wideband signals based on Radon transform is proposed,which is able to measure multi-domain major working parameters of multiple wideband sig-nals simultaneously and instantly,and improve the multi-domain and real-time perception ability of monitoring tar-get characteristics under low SNR condition distinctly.The method realizes the combined power focusing in the spatial and time domains of the whole detection frequency range and the whole detection angle range,and produc-es 2D spectrum amplitude diagram in the spatial and time domains,by combining digital channelized structure and cascade FFT.Based on the diagram,Radon transform is applied to compute linear integrations of different map-ping angles,and the multiple parameters of multiple targets in full scene are measured by set the suitable detec-tion threshold.The experiments show that the proposed method is able to promote parameter measurement accu-racy of weak signals and measure multi-domain major working parameters of multiple wideband signals simultane-ously.

关 键 词：宽带信号 多域参数 二维频谱幅度图 RADON变换 同时测量 低信噪比 

分 类 号：TN971.5[电子电信—信号与信息处理]