雷达通信频谱共享及一体化:综述与展望

随着无线通信技术的发展，全球通信产业对于无线频谱的需求日益增加。在此背景下，雷达与通信的频谱共享(RCSS)引起了工业界和学术界的极大关注。其内涵不仅包括促成雷达与通信设备的同频共存、互不干扰，从而高效利用频谱，还包括设计一种兼容二者的新型一体化系统，使得该系统能同时完成信息传输与目标探测两种功能。该文围绕雷达与通信频谱共享的两种解决方案:(1)雷达与通信系统的同频共存(RCC); (2)雷达通信一体化(DFRC)系统设计，进行了深入而系统的综述。具体而言，该文首先讨论雷达通信在多个频段共存的实例，然后简要介绍了雷达通信一体化技术在多个领域的应用场景。进一步地，讨论雷达通信同频共存和一体化系统的研究进展。最后，总结全文并讨论了该领域内的若干开放问题。 

Radar-communication Spectrum Sharing and Integration: Overview and Prospect

The need of extra wireless spectrum is on the rise, given the rapid development of global wireless communication industry. To this end, Radar and Communication Spectrum Sharing (RCSS) has gained considerable attentions recently from both industry and academia. In particular, RCSS aims not only at enabling the spectral cohabitation of radar and communication systems, but also at designing a novel joint system that is capable of both functionalities. In this paper, a systematic overview of RCSS by focusing on the two main research directions are provided, i.e., Radar-Communication Coexistence (RCC) and Dual-Functional Radar-Communication (DFRC). We commence by discussing the coexistence examples of radar and communication at various frequency bands, and then elaborate on the practical application scenarios of the DFRC techniques. As a further step, the state-of-the-art approaches of both RCC and DFRC are reviewed. Finally we conclude the paper by identifying a number of open problems in the research area of RCSS.