159 citations · 326 across the 10 of their papers we have counts for
12 papers
Network Coexistence Analysis of RIS-Assisted Wireless Communications
Yajun Zhao, Xin Lv
Reconfigurable intelligent surfaces (RISs) have attracted the attention of academia and industry circles because of their ability to control the electromagnetic characteristics of…
Codebook Design and Beam Training for Extremely Large-Scale RIS: Far-Field or Near-Field?
Xiuhong Wei, Linglong Dai, Yajun Zhao +2
Reconfigurable intelligent surface (RIS) can improve the capacity of the wireless communication system by providing the extra link between the base station (BS) and the user. In or…
Applications of Reconfigurable Intelligent Surface in Smart High Speed Train Communications
Yajun Zhao, Jiayi Zhang, Bo Ai
Reconfigurable intelligent surface (RIS) is one of the most promising technologies for 5G-Adv and 6G. It has the characteristics of low cost, low complexity, and easy deployment, w…
Applications and challenges of Reconfigurable Intelligent Surface for 6G networks
Yajun Zhao, Mengnan Jian
Reconfigurable intelligent surface has attracted the attention of academia and industry as soon as it appears because it can flexibly manipulate the electromagnetic characteristics…
AIRIS: Artificial Intelligence Enhanced Signal Processing in Reconfigurable Intelligent Surface Communications
Shun Zhang, Muye Li, Mengnan Jian +2
Reconfigurable intelligent surface (RIS) is an emerging meta-surface that can provide additional communications links through reflecting the signals, and has been recognized as a s…
Dual connectivity and standalone modes for LTE-U
Yajun Zhao, Yu-Ngok Ruyue Li, Liujun Hu +1
Long-Term Evolution in unlicensed bands (LTE-U) has been considered as an effective way of offloading traffic from licensed bands. This paper discusses the scenarios, requirements…
Cubic Metric Reduction for Repetitive CAZAC Sequences in frequency domain
Yajun Zhao, Juan Liu, Saijin Xie
In NR-based Access to Unlicensed Spectrum (NR-U) of 5G system, to satisfy the rules of Occupied Channel Bandwidth (OCB) of unlicensed spectrum, the channels of PRACH and PUCCH have…
Potential Key Technologies for 6G Mobile Communications
Yifei Yuan, Yajun Zhao, Baiqing Zong +1
The standard development of 5G wireless communication culminated between 2017 and 2019, followed by the worldwide deployment of 5G networks, which is expected to result in very hig…
6G Mobile Communication Network: Vision, Challenges and Key Technologies
Yajun Zhao, Guanghui Yu, Hanqing Xu
With the open of the scale-up commercial deployment of 5G network, more and more researchers and related organizations began to consider the next generation of mobile communication…
Inter-Cell Antenna Calibration for Coherent Joint Transmission in TDD System
Hanqing Xu, Yajun Zhao, Linmei Mo +2
In this work the modeling and calibration method of reciprocity error in a coherent TDD coordinated multi-point (CoMP) joint transmission (JT) system are addressed. The modeling in…
Transmission Energy Minimization for Heterogeneous Low-Latency NOMA Downlink
Yanqing Xu, Chao Shen, Tsung-Hui Chang +3
This paper investigates the transmission energy minimization problem for the two-user downlink with strictly heterogeneous latency constraints. To cope with the latency constraints…
Energy-Efficient Non-Orthogonal Transmission under Reliability and Finite Blocklength Constraints
Yanqing Xu, Chao Shen, Tsung-Hui Chang +3
This paper investigates an energy-efficient non-orthogonal transmission design problem for two downlink receivers that have strict reliability and finite blocklength (latency) cons…