雷达通信一体化信号调制技术综述

Review on Signal Modulation Techniques for Joint Radar-Communication Systems

雷达通信一体化是指利用一个发射平台发射同一频段的调制信号,同时实现雷达与通信功能。从通信角度看,雷达与通信信号融合可以缓解频谱资源紧缺的压力,因为有限的频谱资源已经成为5G、6G通信技术发展中需要面对的关键问题。从雷达角度看,雷达与通信信号波形融合可以减小雷达电子设备体积,降低电磁干扰,提高电路集成度,这正是下一代雷达设计需要解决的难题。此外,雷达与通信信号融合可以解决雷达与通信在应用中对频谱资源的竞争问题,提高频谱资源利用效率及信息交互效率。全面梳理了雷达通信一体化调制技术,提出了在不同的雷达通信一体化应用场景中选择不同的一体化调制技术,并重点介绍了几种不同场景下的雷达通信一体化调制技术,同时,讨论了设计雷达与通信一体化信号需要面对的一些关键问题。

The joint Radar-Communication(RadCom)system refers to a system that provides radar and communication functions on a single hardware platform using the same frequency band modulated waveforms.From the perspective of communication,considering the limited availability of spectrum resource has been a tough problem for the development of communications of 5G and 6G,the pressures from the limited availability of spectrum resources can be alleviated by using the joint waveforms for radar and communication applications.While from the perspective of radar,the joint waveforms for radar and communication can reduce radar electronic device size,suppress electromagnetic interference and improve circuit integration.All these are the problems that need to be solved on in the design of the next generation radar.Moreover,the joint waveforms for radar and communication can address the spectrum competition problem between radar and communication applications and improve the spectrum resource utilization efficiency and the information interaction efficiency.The modulation techniques for the joint radar-communication are comprehensively summarized.The concept of different modulation techniques for the joint radar-communication should be selected in different application scenarios.The modulation techniques for the joint radar-communication in several different scenarios are introduced.Finally,some key problems needed to be considered for designing the RadCom signals are discussed.