【摘 要】
：
With the rapid development of wireless communication technology and the explosive growth of mobile data traffic,more and more users are eager to get faster and
【机 构】
：
School of Business Administration,Guangdong University of Finance,Guangzhou 510521,China
论文部分内容阅读
With the rapid development of wireless communication technology and the explosive growth of mobile data traffic,more and more users are eager to get faster and better internet access.In order to meet the needs of users,energy and spectrum utilization are becoming more and more important as new challenges in wireless communication networks.In recent years,reconfigurable intelligent surface(RIS)technology has been proposed in a programmable intelligent way to improve the performance and quality of wireless communication systems.In addition,the RIS performs better in terms of energy efficiency than other technologies.Therefore,the RIS has become research hotspot rapidly because of its unique wireless communication ability.This paper aims to review the RIS,including channel model,design for transmitter and receiver,information theory,and the latest development of RIS-assisted multiple-input multiple-output(MIMO)systems.The applications of RISs in physical layer security,device to device(D2D)and cell coverage extension are also introduced in detail.In addition,we discuss major research challenges related to the RIS.Finally,the potential research directions are proposed.
其他文献
Accurate estimationand real-time compensation for phase offset and Doppler shift are essential for coherent multiinput multi-output (MIMO) systems.Here,a spatia
Ultra-dense networks (UDNs) is a promising solution to meet the exponential increase in mobile data traffic.But the ultra-dense deployment of cells inevitably b
The accuracy of the positioning system in indoor environment is often affected by none-line-of-sight (NLOS) propagation. In order to improve the positioning acc
To solve the problem of mixing matrix estimation for underdetermined blind source separation(UBSS)when the number of sources is unknown,this paper proposed a no
A low complexity punctured belief propagation(BP)detection utilizing channel puncturing for multi-user multiple-input multiple-output(MU-MIMO)systems is propose
现阶段，多媒体技术在教学中被越来越广泛的应用。所谓多媒体技术就是运用多种现代化手段，对信息进行加工处理，显示与再现、模拟、仿真与动画技术的应用。它可以使一些普通条件下
本文主要阐述了网络广告的创意表现形式,旨在为现代网络广告设计理论与实践提供一些理论思考。
This paper mainly expounds the creative expression of online advertisin
Despite convolutional neural network (CNN) is mature in many domains, the understanding of the directions where the parameters of the CNNs are learned towards,