16 citations · 59 across the 9 of their papers we have counts for
5 papers · 1 filter
Energy Efficiency Optimization for NOMA UAV Network with Imperfect CSI
Haijun Zhang, Jianmin Zhang, Keping Long
Unmanned aerial vehicles (UAVs) are developing rapidly owing to flexible deployment and access services as air base stations. However, the channel errors of low-altitude communicat…
Energy-Efficient Resource Allocation in NOMA Heterogeneous Networks
Haijun Zhang, Fang Fang, Julian Cheng +3
Non-orthogonal multiple access (NOMA) has attracted much recent attention owing to its capability for improving the system spectral efficiency in wireless communications. Deploying…
Secure Communications in NOMA System: Subcarrier Assignment and Power Allocation
Haijun Zhang, Ning Yang, Keping Long +3
Secure communication is a promising technology for wireless networks because it ensures secure transmission of information. In this paper, we investigate the joint subcarrier (SC)…
Downlink Energy Efficiency of Power Allocation and Wireless Backhaul Bandwidth Allocation in Heterogeneous Small Cell Networks
Haijun Zhang, Hao Liu, Julian Cheng +1
The widespread application of wireless services and dense devices access have triggered huge energy consumption. Because of the environmental and financial considerations, energy-e…
Fog Radio Access Networks: Mobility Management, Interference Mitigation and Resource Optimization
Haijun Zhang, Yu Qiu, Xiaoli Chu +2
In order to make Internet connections ubiquitous and autonomous in our daily lives, maximizing the utilization of radio resources and social information is one of the major researc…