哈尔滨工业大学电子与信息工程学院,黑龙江哈尔滨 150001
[ "张 云 女,1975年11月出生于黑龙江省虎林市.现为哈尔滨工业大学教授、博士生导师.主要研究方向为雷达信号处理、SAR成像、机器学习和遥感模式分析.E-mail: zhangyunhit@hit.edu.cn" ]
[ "化青龙 男,1995年2月出生于安徽省阜阳市.现为哈尔滨工业大学博士.主要研究方向为雷达图像处理和深度学习网络框架.E-mail: huaqinglong_hit@163.com" ]
[ "姜义成 男,1964年11月出生于黑龙江省哈尔滨市.现为哈尔滨工业大学教授、博士生导师.主要研究方向为雷达信号处理.E-mail:jiangyc@hit. edu. cn" ]
[ "徐 丹 女,1996年4月出生于黑龙江省七台河市.主要研究方向为数据分析与智能图像处理.E-mail: xudanhit@hit.edu.cn" ]
收稿:2021-09-13,
修回:2022-02-20,
纸质出版:2022-05-25
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张云,化青龙,姜义成等.基于混合型复数域卷积神经网络的三维转动舰船目标识别[J].电子学报,2022,50(05):1042-1049.
ZHANG Yun,HUA Qing-long,JIANG Yi-cheng,et al.Recognition of 3D Rotating Ship Based on Mix-CV-CNN[J].ACTA ELECTRONICA SINICA,2022,50(05):1042-1049.
张云,化青龙,姜义成等.基于混合型复数域卷积神经网络的三维转动舰船目标识别[J].电子学报,2022,50(05):1042-1049. DOI: 10.12263/DZXB.20211255.
ZHANG Yun,HUA Qing-long,JIANG Yi-cheng,et al.Recognition of 3D Rotating Ship Based on Mix-CV-CNN[J].ACTA ELECTRONICA SINICA,2022,50(05):1042-1049. DOI: 10.12263/DZXB.20211255.
在较高海情下,由于舰船目标处于随机摆动的非平稳运动状态,常规合成孔径雷达(Synthetic Aperture Radar, SAR)成像处理会使得目标散焦、方位模糊,从而导致三维转动舰船目标识别准确率低.本文提出一种混合型复数域卷积神经网络(Mix-type Complex-Valued Convolutional Neural Network,Mix-CV-CNN),并推导Mix-CV-CNN前向传播与反向传播算法.三维转动舰船目标经过SAR成像处理后存在剩余相位信息,Mix-CV-CNN能充分利用SAR复数域图像的幅度和相位信息,在不进行目标重聚焦的情况下,较好完成SAR复杂运动舰船目标的识别.实验表明,Mix-CV-CNN相较于具有相同自由度的实数域卷积神经网络(Real-Valued Convolutional Neural Network,RV-CNN)识别性能有所提高,实测数据识别平均准确率提高3.85%.
Because the ship targets are in a non-stationary motion state of random swing
conventional synthetic aperture radar(SAR) imaging processing will make the targets defocused and azimuth blurred
resulting in the recognition accuracy of three-dimensional rotating ship. This paper proposes a mixed-type complex-valued convolutional neural network(Mix-CV-CNN) and derives the Mix-CV-CNN forward propagation and backpropagation algorithms. The three-dimensional rotating target has residual phase information after SAR imaging processing. The Mix-CV-CNN could make full use of the amplitude and phase information of the complex SAR image and could better complete the recognition of SAR three-dimensional rotating targets without target refocusing. The experimental results show that Mix-CV-CNN has improved recognition performance compared with the real-valued convolutional neural network(RV-CNN) with the same degree of freedom. The average accuracy is increased by 3.85%.
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