scholarly journals Relay Selection and Power Allocation with QoS Support for Secondary Users in Cognitive Radio Networks

2016 ◽  
Author(s):  
Yu Yang
Keyword(s):  
Cognitive Radio ◽  
Power Allocation ◽  
Cognitive Radio Networks ◽  
Relay Selection ◽  
Radio Networks ◽  
Secondary Users

A novel approach of power allocation for secondary users in cognitive radio networks

2019 ◽  
Vol 75 ◽  
pp. 301-308 ◽  
Author(s):  
Amrit Mukherjee ◽  
Sagarika Choudhury ◽  
Pratik Goswami ◽  
Gezahegn Abdissa Bayessa ◽  
Sumarga K. Sah Tyagi
Keyword(s):  
Cognitive Radio ◽  
Power Allocation ◽  
Cognitive Radio Networks ◽  
Radio Networks ◽  
Secondary Users ◽  
Novel Approach

scholarly journals Joint relay selection and power allocation for NOMA-based multicast cognitive radio networks

2020 ◽  
Vol 14 (13) ◽  
pp. 2027-2037 ◽  
Author(s):  
Mohammed W. Baidas ◽  
Emad Alsusa ◽  
Khairi A. Hamdi
Keyword(s):  
Cognitive Radio ◽  
Power Allocation ◽  
Cognitive Radio Networks ◽  
Relay Selection ◽  
Radio Networks

Joint relay selection and power allocation optimization in industrial cognitive radio networks

2010 ◽  
Vol 30 (11) ◽  
pp. 3072-3076
Author(s):  
Cheng-nian LONG ◽  
Xin-hua ZHANG ◽  
Hai-feng WANG ◽  
Xin-ping GUAN
Keyword(s):  
Cognitive Radio ◽  
Power Allocation ◽  
Cognitive Radio Networks ◽  
Relay Selection ◽  
Radio Networks

Joint Power Allocation and Relay Selection Optimization for Cognitive Radio Networks

2013 ◽  
Vol 791-793 ◽  
pp. 1153-1159
Author(s):  
Li Ping Su ◽  
Dong Chen ◽  
Wei Hua Huang ◽  
Ning Li
Keyword(s):  
Cognitive Radio ◽  
Power Allocation ◽  
Cognitive Radio Networks ◽  
Relay Selection ◽  
Radio Networks ◽  
System Capacity ◽  
System Throughput ◽  
Joint Power ◽  
Selection Scheme ◽  
Multiple User

This paper investigates the joint power allocation (PA) and relay selection scheme (RS) in two-way relaying cognitive radio networks consisting of multiple user-pairs and multiple relays. In order to reduce the computational complexity for practical scenario, we propose a branch and bound based (BnB-based) power allocation and relay selection scheme and a greedy power allocation and relay selection scheme to maximize the system throughput. The system is assumed under the constraint that the interference power from the secondary nodes in two way relay systems to primary user (PU) shall be less than a predefined interference threshold which can guarantee the normal communication of PU. Numerical simulation results show that the optimal PA and RS scheme has the highest system capacity, however, the greedy PA and RS scheme has the lowest complexity. The proposed BnB-based PA and RS scheme has the better tradeoff of system throughput and complexity than the above two schemes.

scholarly journals Throughput and Outage Probability Analysis for Cognitive Radio-Non-Orthogonal Multiple Access in Uplink and Downlink Scenarios

2020 ◽  
Vol 7 (4) ◽  
pp. 659-666
Author(s):  
H.T. Madan ◽  
Prabhugoud I. Basarkod
Keyword(s):  
Cognitive Radio ◽  
Outage Probability ◽  
Power Allocation ◽  
Cognitive Radio Networks ◽  
Multiple Access ◽  
Radio Networks ◽  
Spectrum Efficiency ◽  
Secondary Users ◽  
Power Domain ◽  
The Impact

Non orthogonal multiple access (NOMA) in cognitive radio (CR) network has been recognized as potential solution to support the simultaneous transmission of both primary and secondary users. In addition, CR-NOMA can also be used to serve multiple secondary networks in overlay cognitive radio networks. The aim of our work is to increase the secondary user’s throughput without compromising in QoS requirements of the primary users. Our presented work analyses the performance of power domain NOMA in cognitive radio networks for both uplink and downlink scenarios. The primary aspect of the work is to investigate the impact of power allocation on spectrum efficiency and fairness performance of CR-NOMA. Objective function is to maximize the overall throughput under the QOS constraints of the users. We have derived closed form expressions for optimized power allocation coefficient(α) for CR-NOMA uplink and downlink communications. Parameters causing the channel outage, have been examined and conditions for outage probability is derived for CR-NOMA communication. Finally, we have presented the simulation results to validate the mathematical models that are developed for power allocation coefficient and outage probability.

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