基于CNN-LSTM神经网络的前视成像算法 |
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作者姓名: | 孙晓翰 李凉海 张彬 |
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作者单位: | 1.北京遥测技术研究所 北京 100076;2.中国航天电子技术研究院 北京 100094 |
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摘 要: | 雷达前视成像作为雷达成像领域的难点与重点,在自动驾驶、导航、精确制导等方面具有广阔的应用前景。传统的前视成像算法受限于天线孔径的宽度,无法实现高分辨率的成像,本文使用卷积神经网络(Convolutional Neural Networks, CNN)与长短期记忆(Long Short-Term Memory,LSTM)网络相结合实现前视成像中方位向的预测,首先介绍了扫描前视成像信号的类卷积模型及其病态性,利用脉冲压缩以及距离徙动校正对回波信号预处理,输入CNN-LSTM神经网络逐距离单元进行方位向估计。仿真结果表明:算法能有效提高前视成像的方位分辨率,实现前视成像的超分辨。
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关 键 词: | 前视成像 深度学习 卷积神经网络 病态性逆问题 |
收稿时间: | 2023/12/25 0:00:00 |
修稿时间: | 2024/1/3 0:00:00 |
Forward-looking Imaging Algorithm Based on CNN-LSTM Neural Network |
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Authors: | SUN Xiaohan LI Lianghai ZHANG Bin |
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Institution: | 1.Beijing Research Institute of Telemetry, Beijing 100076, China;2.China Academy of Aerospace Electronics Technology, Beijing 100080, China |
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Abstract: | As a difficulty and focus in the field of radar imaging, radar forward-looking imaging has broad application prospects in automatic driving, navigation, precision guidance and so on. The traditional forward-looking imaging algorithm is limited by the width of the antenna aperture and cannot achieve high-resolution imaging. In this paper, CNN ( Convolutional Neural Networks ) neural network and LSTM ( Long Short-Term Memory ) neural network are combined to realize the prediction of azimuth in forward-looking imaging. Firstly, the convolution-like model of the scanning forward-looking imaging signal and its ill-posedness are introduced. The echo signal is preprocessed by pulse compression and range migration correction, and input into the CNN-LSTM neural network to perform azimuth estimation by range unit. The simulation results show that the algorithm can effectively improve the azimuth resolution of forward-looking imaging and realize the super-resolution of forward-looking imaging. |
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Keywords: | Forward-looking imaging Deep learning Convolutional neural network Ill-posed inverse problem |
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