基于主动感知辅助的车联网波束赋形

Beamforming Scheme in Vehicular Communications Assisted byActive Sensing

毫米波大规模多入多出系统具有提升车联网系统服务质量的潜力,但现有的系统设计无法充分发挥该潜力。针对该问题,通过分析毫米波频段通信信道与感知信道的相似特性,论证了在车联网系统中使用感知功能对通信功能进行辅助的可行性。在此基础上,以波束管理为核心,阐述了具有更低导频开销的帧结构方案和使用感知功能辅助通信功能的信号处理一般流程。最后,讨论并总结了基于感知辅助的车联网通信系统中的若干开放问题。

The millimeter-wave massive multiple-input multiple-output systems have the potential to improve the service quality of vehicleto-infrastructure(V2I)networks,but existing system designs cannot fully exploit this potential.In response to this problem,the feasibility of using the sensing function to assist the communication function in the V2I networks is demonstrated by analyzing the similar characteristics of the communication channel and the sensing channel in the millimeter wave system.On this basis,a general design framework,the physical layer data-frame structure,and the signal processing pipeline are elaborated.Finally,several open problems in sensing-assisted V2I networks are summarized and discussed.