基于距离辅助的超宽带MIMO雷达图像人体姿态重构网络

超宽带多输入多输出（Multiple-input Multiple-output, MIMO）雷达可以获取目标的多维信息，在目标探测和人体动作分类等方面有很大的优势。然而，在实际应用中，超宽带MIMO雷达获取的人体目标成像结果通常分辨率较低，抽象难懂，且目标距离越远雷达图像分辨率越低。针对以上问题，本文提出了一种基于距离辅助的超宽带MIMO雷达图像人体姿态重构网络，首先使用卷积神经网络提取人体目标成像的信号强度和空间位置特征，然后使用反卷积模块重构出人体目标的各个关节点位置。同时，考虑雷达成像结果随着距离的变远而恶化，本文将目标的距离作为辅助信息来选择合适的网络模型参数，进而提高姿态重构的精度。实验结果表明，本方法可以将抽象的人体目标雷达图像转化为易于理解的人体关节姿态，且有较好的姿态重构性能，极大增强了传统雷达图像的可视化性能。同时，距离信息的引入提高了姿态重构精度，有效克服了距离增大带来的影响。 

Human pose reconstruction network based on ultra-wideband MIMO radar image with distance-assisted

Ultra-wideband multiple-input multiple-output (MIMO) radar can obtain multi-dimensional information of the target, and has great advantages in target detection and human motion classification. However, in practical application, the human target imaging results obtained by the ultra-wideband MIMO radar are usually low-resolution, and the farther the target distance is, the lower the resolution of radar image is, which is hard to understand. In response to the above problems, this paper proposes a distance-assisted ultra-wideband MIMO radar image human body pose reconstruction method. First, the convolutional neural network is used to extract the signal strength and spatial position characteristics of the human target imaging, and then the deconvolution modules are used to reconstruct the position of each joint point of the human target. At the same time, considering that the result of radar imaging deteriorates as the distance increases, the distance of the target is used as auxiliary information to select the appropriate network model parameters to improve the accuracy of pose reconstruction. Experimental results show that this method can convert abstract human target radar images into easy-to-understand human joint poses, and has excellent pose reconstruction performance, which greatly enhances the visualization performance of traditional radar images. Meanwhile, the introduction of distance information improves the accuracy of pose reconstruction and effectively overcomes the influence of distance increase.