基于孪生网络的电磁目标跨模式识别算法  

Cross-Modal Recognition Algorithm of Electromagnetic Targets via Siamese Network

作　　者：张伟 王沙飞[3] 林静然 利强 邵怀宗 ZHANG Wei;WANG Sha-fei;LIN Jing-ran;LI Qiang;SHAO Huai-zong(School of Information and Communication Engineering,University of Electronic Science and Technology of China,Chengdu,Sichuan 611731,China;Science and Technology on Electronic Information Control Laboratory,Chengdu,Sichuan 610036,China;Northern Institute of Electronic Equipment of China,Beijing 100191,China;Peng Cheng Laboratory,Shenzhen,Guangdong 518055,China)

机构地区：[1]电子科技大学信息与通信工程学院,四川成都611731 [2]电子信息控制重点实验室,四川成都610036 [3]北方电子设备研究所,北京100191 [4]鹏城实验室,广东深圳518055

出　　处：《电子学报》2022年第6期1281-1290,共10页Acta Electronica Sinica

基　　金：国家自然科学基金(No.U19B2028,No.G0562171110)。

摘　　要：以深度学习为代表的人工智能技术是解决电磁目标识别问题的一种有效方法.然而,在识别多模式电磁目标时,目标内部不同模式间数据的差异可能掩盖目标个体间的差异,当某种模式训练样本缺失或稀少时,该模式下的目标识别性能会显著下降.为此,提出一种基于孪生网络的电磁目标跨模式识别算法,在度量学习框架下通过优化设计网络结构和损失函数,引导网络在分类学习过程中拉近同一目标各模式数据间的距离,拉远不同目标数据间的距离,并结合邻近判决准则实现多模式电磁目标在非均衡数据集上的跨模式识别.基于实际数据的测试结果表明,在相同数据集和网络规模条件下,所提方法的跨模式识别率较经典卷积神经网络方法和数据增强方法提升20%.The artificial intelligence technology(e.g.,deep learning) is an effective approach to electromagnetic target(ET) recognition.However,in the recognition of multi-mode ETs,when the training samples with a certain mode are missing or rare,the recognition rate with this mode will be significantly degraded.The reason mainly lies in that the data distance between different modes of the same ET may exceed the data distance between different ETs.To remedy this,a crossmodal ET recognition approach via Siamese network is developed in this paper.Following the framework of metric learning,we design the network structure and the loss function carefully,so that the recognition training process intentionally drives the Siamese network to enlarge the data distance between different ETs while shorten the distance between different modes of the same ET.Consequently,the multi-mode ETs can still be successfully recognized by employing certain distance-based decision criterion,even with imbalanced training data sets for different modes.The numerical results based on realistic data show that with same data sets and network size,the cross-modal recognition rate of the proposed approach is 20% higher than that of the classical convolutional neural network approach,and that of the popular data-enhancement approaches.

关 键 词：电磁目标 跨模式识别 孪生网络 度量学习 非均衡数据集 

分 类 号：TN911[电子电信—通信与信息系统] TP181[电子电信—信息与通信工程]