Quantum sensing, built upon fundamental quantum phenomena like entanglement and squeezing, is revolutionizing precision and sensitivity across diverse domains, including quantum metrology and imaging. Its impact is now stretching into radar and LiDAR applications, giving rise to the concept of quantum radar. Unlike traditional radar systems relying on classical electromagnetic, quantum radar harnesses the potential of the quantum properties of photon states like entanglement and quantum superposition to transcend established boundaries in sensitivity and accuracy. This comprehensive review embarks on an exploration of quantum radar and quantum LiDAR, guided by two primary objectives: enhancing sensitivity through quantum resources and refining accuracy in target detection and range estimation through quantum techniques. We initiate our exploration with a thorough analysis of the fundamental principles of quantum radar, which includes an evaluation of quantum illumination protocols, receiver designs, and their associated methodologies. This investigation spans across both microwave and optical domains, providing us with insights into various experimental demonstrations and the existing technological limitations. Additionally, we review the applications of quantum radar protocols for enhanced accuracy in target range determination and estimation. This section of our review involves a comprehensive analysis of quantum illumination, quantum interferometry radar, and other quantum radar protocols, providing insights into their contributions to the field. This review offers valuable insights into the current state of quantum radar, providing a deep understanding of key concepts, experiments, and the evolving landscape of this dynamic and promising field.

量子传感建立在纠缠和挤压等基本量子现象的基础上，正在彻底改变包括量子计量和成像在内的不同领域的精度和灵敏度。它的影响现已延伸到雷达和激光雷达应用，从而催生了量子雷达的概念。与依赖经典电磁的传统雷达系统不同，量子雷达利用光子态的量子特性（如纠缠和量子叠加）的潜力来超越灵敏度和准确性的既定界限。这篇全面的综述开始了对量子雷达和量子激光雷达的探索，以两个主要目标为指导：通过量子资源增强灵敏度，以及通过量子技术提高目标检测和距离估计的准确性。我们从对量子雷达基本原理的彻底分析开始我们的探索，其中包括对量子照明协议、接收器设计及其相关方法的评估。这项研究跨越微波和光学领域，为我们提供了对各种实验演示和现有技术限制的见解。此外，我们回顾了量子雷达协议的应用，以提高目标距离确定和估计的准确性。我们评论的这一部分涉及对量子照明、量子干涉测量雷达和其他量子雷达协议的全面分析，深入了解它们对该领域的贡献。这篇综述提供了对量子雷达当前状态的宝贵见解，提供了对关键概念、实验以及这个充满活力和前景的领域的不断发展的前景的深入理解。