智能超表面在波束及信息调控中的应用

Application of reconfigurable intelligent surface in beamforming and information modulation

现代移动通信中无线信道的随机性、不确定性和不可控性是影响通信质量的关键因素,往往会导致接收端信号质量降低,从而限制了信息传输的速率与范围。目前正兴起的6G技术研究中,智能超表面是被积极讨论的研究方向之一,其是由亚波长结构组成的超薄人工表面,具有现场可编程能力和时空信息调制能力,可精准、高效地操控电磁波,可被用于重塑无线传播环境。通过对智能超表面的概念、基于时空调制的波束调控方法、基于智能超表面的无线中继以及通信系统4个方面的综述和分析,展示了智能超表面在辅助移动通信中具有的应用潜力,为6G的发展提供了新的思路。

In modern mobile communications,the randomness,uncertainty,and uncontrollability of wireless channels are the pivotalfactors that affect the communication quality,which often leads to the deterioration of the signal quality at the receiving terminal,and thereby limiting the rate and range of information transmission.In the emerging study of 6G technology,reconfigurable intelligent surface is one of the research directions under active discussions,which is an ultra-thin artificial surface composed of sub-wavelength structures with field programmability and spatiotemporal information modulation capabilities.The reconfigurable intelligent surface can manipulate electromagnetic waves accurately and efficiently,thus providing the possibility for reshaping the wireless propagation environment.In this review,the concept of the reconfigurable intelligent surface,the beam forming method based on spatiotemporal modulation,the wireless relay and the communication system based on the reconfigurable intelligent surface were reviewed and discussed.It demonstrates the great potential of reconfigurable intelligent surface in assisting mobile communication,and provides new ideas for the development of 6G.