基于单雷达的超分辨电磁成像研究

This project focuses on the study of the super-resolution electromagnetic (EM) imaging based on a single broadband radar. To that end, four main research aspects are carried, in particular, (a)building the theoretical foundation of a single-radar based imaging beyond the Rayleigh limit, (b)developing a more general methodology for designing the spatio-temporal planar lens dedicated for the super-resolution EM imaging, (c)designing real-time EM imaging algorithms for a single broadband radar system in the context of sparse signal processing, and (d)building the experimental flat with the operational frequency ranging from 8GHz to 15GHz. This project will explore the research route, namely, theoretical analysis->numerical simulation->the commerical software based validations ->experimental investigation, which leads finally to the theoretical framework and mature experimental flatform for a single broadband radar imaging system. The appealing advantages of proposed a single broadband imaging system are (a)no requirement on near-field measurements, (b)fully exploiting recent results from both novel man-made electromagnetic materials and advanced signal processing, (c)decreasing the cost of data acquisition. It is expected that the results through this project will surpass some difficulties faced by existing super-resolution imaging systems, and drive down the hardware cost and system complexity, and furthermore improve the imaging resolution.

项目研究基于单雷达的超分辨电磁成像的理论和方法。有四个主要研究内容：(a)基于单雷达的超分辨电磁成像理论，(b)时空色散透镜的设计理论和方法，(c)基于稀疏信号处理方法的单雷达成像系统的快速、稳定成像算法,和(d)搭建8GHz-15GHz波段的实验平台，开展实验研究，完成项目所提理论和方法的实验验证。项目采用"理论分析=>数值模拟=>软件仿真=>实验验证"的研究方式，最终形成系统的单雷达超分辨电磁成像的理论和实现方法。单雷达超分辨电磁成像体制具有如下主要特点：（a）不需要近场测量，实现实时的超分辨成像，(b)综合利用了人工电磁材料(时空色散透镜)和信号处理（稀疏信号处理）的最新研究成果，(c)低的数据获取成本和高的数据获取效率。项目的研究成果将克服现有超分辨电磁成像体制和方法的一些难题，降低硬件成本和系统复杂性，提高探测精度和成像分辨率，形成具有我国自主知识产权的超分辨成像核心技术的基础。

项目开展了单雷达超分辨电磁成像的理论、算法和实验等方面的研究工作，取得的重要成果包括：1）建立了单雷达超分辨电磁成像的超谐振理论，2)建立了系列机器学习驱动的特征增强超分辨电磁成像算法，3）搭建了实验平台，完成了若干超分辨成像的实验测试。研究成果实现了远场超分辨成像，突破了近场扫描超分辨成像在系统复杂性和效率方面的瓶颈，为实时的超分辨提供了新思路。相关研究成果将有望推广于太赫兹等生物医学诊断等领域，也有望用于安全检查、工业无损诊断等军民用领域。.项目已发表SCI期刊论文6篇（已标注），其中1篇Nature Communications论文。出版中文学术专著1部，出版英文章节1章。