scholarly journals Physical layer security in cooperative amplify-and-forward relay networks over mixed Nakagami-m and double Nakagami-m fading channels: performance evaluation and optimisation

2020 ◽  
Vol 14 (1) ◽  
pp. 95-104 ◽  
Author(s):  
Anshul Pandey ◽  
Suneel Yadav
Keyword(s):  
Performance Evaluation ◽  
Fading Channels ◽  
Physical Layer Security ◽  
Relay Networks ◽  
Physical Layer ◽  
Amplify And Forward

scholarly journals A Coalitional Formation Game for Physical Layer Security of Cooperative Compressive Sensing Multi-Relay Networks

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2942
Author(s):  
Jialun Li ◽  
Shuai Chang ◽  
Xiaomei Fu ◽  
Liang Zhang ◽  
Yishan Su ◽  
...  
Keyword(s):  
Compressive Sensing ◽  
Physical Layer Security ◽  
Relay Networks ◽  
Physical Layer ◽  
Cooperative Relaying ◽  
Secrecy Capacity ◽  
Amplify And Forward ◽  
Effective Technology ◽  
The Individual ◽  
Formation Game

Cooperative relaying is an effective technology to improve the capacity of physical-layer security, in which the relay helps forward the received signal to the destination. In this paper, a cooperative compressive sensing and amplify-and-forward (CCS-AF) scheme, which combines the compressive sensing theory and amplify-and-forward strategy, is proposed to increase the secrecy capacity. To optimize the secrecy performance, a coalition formation algorithm based on coalitional game theory of optimal relay selection is proposed to maximize the secrecy capacity. Different to maximizing the individual utility based on the traditional pareto order, the max-coalition order rule is newly defined to guide the coalitional formation. Simulation results indicate that with the proposed algorithm, part of the relays could form a coalition to forward the information and the proposed algorithm could significantly improve the secrecy capacity of cooperative multi-relay networks.

scholarly journals Physical Layer Security for Cooperative NOMA Networks via Nakagami-m Fading Channels

2021 ◽  
Author(s):  
Wided Hadj Alouane
Keyword(s):  
Theoretical Analysis ◽  
Fading Channels ◽  
Physical Layer Security ◽  
Multiple Access ◽  
Physical Layer ◽  
Secrecy Capacity ◽  
Amplify And Forward ◽  
Decode And Forward ◽  
Asymptotic Expressions ◽  
Relaying Systems

Abstract In this paper, we investigate the physical layer security in cooperative non-orthogonal multiple access (NOMA) networks over Nakagamim fading channels. Both amplify-and-forward (AF) and decode-and-forward (DF) protocols are studied. More particularly, closed-form exact and asymptotic expressions for strictly positive secrecy capacity are provided considering NOMA-AF and NOMA-DF relaying systems. Numerical results are presented to justify the accuracy of the obtained theoretical analysis. These results show that NOMA-AF and NOMA-DF relaying networks have a similar secrecy performance.

Average Fade Duration for Amplify-and-Forward Relay Networks in Fading Channels

2015 ◽  
Vol 14 (10) ◽  
pp. 5454-5467 ◽  
Author(s):  
F. Javier Lopez-Martinez ◽  
Ernest Kurniawan ◽  
Russ Islam ◽  
Andrea Goldsmith
Keyword(s):  
Fading Channels ◽  
Relay Networks ◽  
Amplify And Forward ◽  
Average Fade Duration
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