分布式相参雷达技术通过多节点高性能信号同步实现跨平台的信号级相参融合,可大幅提升雷达探测、跟踪和抗干扰等能力,是雷达领域的重要发展方向之一。随着雷达频率范围的拓展、瞬时带宽的增大和搭载平台的多样化,分布式相参雷达技术对节点间信号的时间、空间、频率、相位同步性能提出了越来越高的要求,这使得传统电学信号同步技术面临巨大挑战。文中介绍了分布式相参雷达对信号时、空、频、相同步的性能要求和国内外相关技术的研究进展,重点总结了微波光子同步技术的基本原理和代表性成果;构建了微波光子分布式相参探测原理验证系统,验证了微波光子分布式相参的可行性,为推动分布式相参雷达的前沿发展与工程化应用提供了关键技术支撑。

Based on high-performance signal synchronization among multiple radars, distributed coherent radar can realize signallevel coherent fusion, significantly enhancing radar detection, tracking, and anti-jamming capabilities, which represents one of the important development directions in the field of radar. As the frequency range and instantaneous bandwidth continue to expand,and platform forms diversify, distributed coherent radar technology demands increasingly precise signal synchronization in terms of time, space, frequency, and phase. This poses significant challenges to traditional electrical signal synchronization technologies.The performance requirements of signal synchronization technologies and reviews of the research progresses are presented in this paper.Then, the basic principles and representative achievements of microwave photonic synchronization technologies which address synchronization challenges in time, space, frequency, and phase domains are summarized. Finally, a proof-of-concept system for microwave photonic distributed coherent detection is constructed, verifying the feasibility of distributed coherent detection. Microwave photonic signal synchronization provides an important technological pathway for advancing the frontier development and engineering applications of distributed coherent radar.

TN957

国家自然科学基金资助项目(62075095,62271249)