Progress of deep learning-based target recognition in radar images

Abstract

Radar detection is an effective earth observation means, and target recognition in radar images is its important research direction. Deep learning has been successfully applied to many fields but training deep neural networks requires a mass of data. The lack of samples has become the major factor that impedes the application of deep learning approaches to target recognition in radar images. This paper reviews the research progress of deep learning based target recognition in radar images, with representative methods being combed and summarized. First, data augmentation and neural network models designed for the task of radar image target recognition are introduced. The paper then presents in detail the target recognition methods based on transfer learning, metric learning, and semi-supervised learning in radar images with few samples, which are proposed by our research group. Finally, existing problems and future development trends are discussed.