基于SET-CNN的紧凑型地波雷达弱目标检测方法  

Weak Target Detection Method Based on SET-CNN for Compact HFSWR

作　　者：李发瑞 纪永刚 任继红 程啸宇 王心玲 LI Farui;JI Yonggang;REN Jihong;CHENG Xiaoyu;WANG Xinling(College of Oceanography and Space Informatics,China University of Petroleum(East China),Qingdao 266580,China;Technology Innovation Center for Maritime Silk Road Marine Resources and Environment Networked Observation,MNR,Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)海洋与空间信息学院,山东青岛266580 [2]自然资源部海上丝路海洋资源环境组网观测技术创新中心,山东青岛266580

出　　处：《海洋科学进展》2023年第4期753-764,共12页Advances in Marine Science

基　　金：国家自然科学基金项目(62271507和62031015);山东省自然科学基金项目(ZR2022MF235)。

摘　　要：紧凑型高频地波雷达发射功率较低且采用小孔径阵列,导致雷达回波中的弱目标增多,进而引起基于距离-多普勒谱的目标检测方法性能降低,目标探测能力减弱。为提高紧凑型地波雷达对弱目标的检测性能,本文提出一种基于同步提取变换-卷积神经网络(Synchroextracting Transform-Convolutional Neural Network,SET-CNN)的紧凑型地波雷达弱目标检测方法:首先在时频谱处理中,利用信噪比方法抑制信号中的海杂波,减少杂波时频脊线对目标检测的影响;然后基于SET时频谱构建时频脊线样本数据库,再通过卷积神经网络进行时频脊线分类,并基于分类结果的后处理完成船只目标检测。通过仿真和实测数据验证提出的目标检测方法,结果表明,本文提出的方法能够有效检测到弱目标,提高紧凑型地波雷达的目标检测性能。Compact High-Frequency Surface Wave Radar(HFSWR)with low transmit power and small aperture array leads to an increase of weak targets in the radar echoes,which in turn degrades the performance of range-Doppler spectrum-based target detection method,and weakens the target detection capability.In order to improve the detection performance of compact HFSWR on weak target signals,this paper proposes a weak target detection method for HFSWR based on Synchroextracting Transform-Convolutional Neural Network(SET-CNN).Firstly,the Signal-to-Noise Ratio(SNR)method is used to suppress the sea clutter in the signal and reduce the influence of the clutter time-frequency ridges on the target detection.Then the time-frequency ridge sample database is conducted based on the SET time-frequency spectrum,and then the time-frequency ridges are classified through the CNN.Thereafter the vessel targets are detected by the post-processing of the classification results.The proposed target detection method is validated by simulation and measured data,and the results show that the method proposed can effectively detect weak targets and improve the up-to-target detection performance of compact high-frequency surface wave radar.

关 键 词：紧凑型高频地波雷达 同步提取变换-卷积神经网络(SET-CNN) 弱目标检测 时频脊线样本数据库 

分 类 号：TN958.93[电子电信—信号与信息处理]