scholarly journals Joint optimization scheme for intelligent reflecting surface aided multi‐relay networks

2021 ◽  
Author(s):  
Xueyi Li ◽  
Angus K. Y. Wong ◽  
Kevin Hung ◽  
Yonghua Wang ◽  
Everett X. Wang
Keyword(s):  
Relay Networks ◽  
Joint Optimization ◽  
Optimization Scheme ◽  
Reflecting Surface

scholarly journals Joint optimization of beamforming and power allocation for DAJ-based untrusted relay networks

ETRI Journal ◽  
2018 ◽  
Vol 40 (6) ◽  
pp. 714-725
Author(s):  
Rugui Yao ◽  
Yanan Lu ◽  
Tamer Mekkawy ◽  
Fei Xu ◽  
Xiaoya Zuo
Keyword(s):  
Power Allocation ◽  
Relay Networks ◽  
Joint Optimization ◽  
Untrusted Relay

Joint Optimization Scheme for Spectrum Leasing in Cognitive Radio Networks

2018 ◽  
Author(s):  
Xiaomin Liu ◽  
Lixin Li ◽  
Wei Liang ◽  
Fucheng Yang ◽  
Haitao Xu ◽  
...  
Keyword(s):  
Cognitive Radio ◽  
Cognitive Radio Networks ◽  
Radio Networks ◽  
Joint Optimization ◽  
Optimization Scheme ◽  
Spectrum Leasing

scholarly journals A Joint Optimization Scheme of Resource Allocation in Downlink NOMA with Statistical Channel State Information

2020 ◽  
Author(s):  
Lei Xu ◽  
Jing Yi Yao ◽  
Jing Cai ◽  
Yu Hong Fang ◽  
Hui Xiao Li
Keyword(s):  
Power Allocation ◽  
Channel State Information ◽  
Communication Systems ◽  
Multiple Access ◽  
Joint Optimization ◽  
System Throughput ◽  
Optimization Scheme ◽  
Channel State ◽  
State Information ◽  
User Grouping

Abstract In a real communication scenario, it is very difficult to obtain the real-time Channel State Information(CSI) accurately, so the communication systems with statistical CSI have been researched. In order to maximize the throughput of the downlink Non-Orthogonal Multiple Access (NOMA) system with statistical CSI, the formula of system throughput is derived at first. Then, according to the combinatorial characteristics of the original optimization problem, it is divided into two subproblems, that is user grouping and power allocation. At last, a joint optimization scheme is proposed. In which, Genetic algorithm is introduced to solve the subproblem of power allocation, and Hungarian algorithm is introduced to solve the subproblem of user grouping. By comparing the ergodic date rate of NOMA users with statistical CSI and perfect CSI, the effectiveness of the statistical CSI sorting is verified. Compared with the Orthogonal Multiple Access (OMA) scheme, the NOMA scheme with the fixed user grouping scheme and the random user grouping scheme, the proposed scheme can effectively improve the system throughput.

Joint Optimization for Secure Intelligent Reflecting Surface Assisted UAV Networks

2020 ◽  
pp. 1-1
Author(s):  
Sisai Fang ◽  
Gaojie Chen ◽  
Yonghui Li
Keyword(s):  
Joint Optimization ◽  
Reflecting Surface
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