scholarly journals Optimization of secondary user capacity in a centralized cooperative cognitive radio network with primary user under priority

2020 ◽  
Vol 2 (7) ◽  
Author(s):  
Sanjoy Debnath ◽  
Chandrashekhar Rai ◽  
Debarati Sen ◽  
Srimanta Baishya ◽  
Wasim Arif
Keyword(s):  
Cognitive Radio ◽  
Cognitive Radio Network ◽  
Primary User ◽  
Secondary User ◽  
Radio Network ◽  
User Capacity

scholarly journals Target Channel Selection Algorithm for Cognitive Radio Network

2018 ◽  
Vol 7 (4.6) ◽  
pp. 198
Author(s):  
Yuvaraj K.S ◽  
Priya P. ◽  
Thiagarasu V.
Keyword(s):  
Cognitive Radio ◽  
Cognitive Radio Network ◽  
Channel Selection ◽  
Primary User ◽  
Spectrum Allocation ◽  
Secondary User ◽  
Radio Network ◽  
Collision Rate ◽  
Selection Algorithm ◽  
Maximum Time

Cognitive radio network has attained more popularity because of giving prominent solution for spectrum inefficiency due to static spectrum allocation. This research proposed target channel selection algorithm which have been employed to improving the throughput and reducing number of handoffs. The proposed target channel selection algorithm is select the channel based on the idle probability and efficiency reward of channel and these are calculated from the surveillance of earlier usage statistics. When the channel selection is based on the above factor, the Secondary User gets chance to utilize the Primary user channel in maximum time to achieve optimal goal. The results show that proposed algorithm-based channel selection shows the better performance than existing algorithms in factors such as throughput, number of handoffs and collision rate. 

scholarly journals Secure Beamforming in 5G-Based Cognitive Radio Network

Symmetry ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1260
Author(s):  
Hyils Sharon Magdalene Antony ◽  
Thulasimani Lakshmanan
Keyword(s):  
Cognitive Radio ◽  
Information Exchange ◽  
Cognitive Radio Network ◽  
Multiple Input Multiple Output ◽  
Primary User ◽  
Radio Network ◽  
Secrecy Rate ◽  
Secondary Users ◽  
Input Multiple Output ◽  
The Impact

Cognitive radio network (CRN) and non-orthogonal multiple-access (NOMA) is a significant system in the 5G wireless communication system. However, the system is an exceptional way for the cognitive users to secure a communication from the interferences in multiple-input multiple-output (MIMO)-NOMA-based cognitive radio network. In this article, a new beamforming technique is proposed to secure an information exchange within the same cells and neighboring cells from all intervened users. The interference is caused by an imperfect spectrum sensing of the secondary users (SUs). The SUs are intended to access the primary channels. At the same time, the primary user also returns to the channel before the SUs access ends. This similar way of accessing the primary channel will cause interference between the users. Thus, we predicted that the impact of interferences would be greatly reduced by the proposed technique, and that the proposed technique would maximize the entire secrecy rate in the 5G-based cognitive radio network. The simulation result provides better evidence for the performance of the proposed technique.

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