159 citations · 326 across the 10 of their papers we have counts for
6 papers · 1 filter
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…
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…
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…