Outage analysis of cognitive non‐orthogonal multiple access downlink system with secondary source selection in Nakagami‐m fading environment

2021 ◽  
Vol 34 (8) ◽  
Author(s):  
Sashiganth M ◽  
Thiruvengadam S.J ◽  
Sriram Kumar D
Keyword(s):  
Multiple Access ◽  
Secondary Source ◽  
Source Selection ◽  
Downlink System ◽  
Outage Analysis

scholarly journals Studying strictly positive secure capacity in cognitive radio-based non-orthogonal multiple access

2021 ◽  
Vol 10 (2) ◽  
pp. 848-855
Author(s):  
Chi-Bao Le ◽  
Dinh-Thuan Do
Keyword(s):  
Cognitive Radio ◽  
Multiple Access ◽  
Access Network ◽  
Simulation Method ◽  
Secondary User ◽  
Secondary Source ◽  
Channel State ◽  
Secondary Network ◽  
Fixed Power ◽  
Multiple Relay

This paper studies a downlink security-aware secure outage performance in the secondary network of cognitive radio-assisted non-orthogonal multiple access network (CR-NOMA). The multiple relay is employed to assist transmission from the secondary source to destinations. The security-aware performance is subject to constraints in fixed power allocation factor assigned to each secondary user. The security-aware secure performance is based on channel state information (CSI) at the physical layer in which an eavesdropper intends to steal information. According to the considered system, exact expressions of Strictly positive secure capacity (SPSC) are proved to analyze system in terms of secure performance. Finally, the secondary user secure problem is evaluated via Monte-Carlo simulation method. The main results indicate that the secure performance of proposed system can be improved significantly.

Comparison of Multiple Access Schemes for an OFDM Downlink System

1997 ◽  
pp. 23-30 ◽  
Author(s):  
Hermann Rohling ◽  
Karsten Brüninghaus ◽  
Rainer Grünheid
Keyword(s):  
Multiple Access ◽  
Multiple Access Schemes ◽  
Downlink System

scholarly journals Outage Analysis and Power Allocation in Uplink Non-Orthogonal Multiple Access Systems

2018 ◽  
Vol 22 (2) ◽  
pp. 336-339 ◽  
Author(s):  
Ye Liu ◽  
Mahsa Derakhshani ◽  
Sangarapillai Lambotharan
Keyword(s):  
Power Allocation ◽  
Multiple Access ◽  
Outage Analysis

scholarly journals Secure outage probability of cognitive radio network relying non-orthogonal multiple access scheme

2021 ◽  
Vol 10 (2) ◽  
pp. 828-836
Author(s):  
Chi-Bao Le ◽  
Dinh-Thuan Do
Keyword(s):  
Outage Probability ◽  
Multiple Access ◽  
Cognitive Radio Network ◽  
Signal To Noise Ratio ◽  
Base Station ◽  
Secondary Source ◽  
Radio Network ◽  
Secondary Network ◽  
Access Scheme ◽  
The Internet Of Things

This paper studies the secondary network relying relay selection to transmit signal from the secondary source (base station) to two destinations. Especially, two destinations are required non-orthogonal multiple access (NOMA) scheme and it benefits to implementation of the Internet of Things (IoT) systems. However, eavesdropper over-hears signal related link from selected relay to destination. This paper measure secure performance via metric, namely secure outage probability (SOP). In particular, signal to noise ratio (SNR) criterion is used to evalute SOP to provide reliable transmission to the terminal node. Main results indicates that the considered scheme provides performance gap among two signals at destination. The exactness of derived expressions is confirmed via numerical simulation.

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