The necessity of relay selection for beamforming in amplify-and-forward networks

2011 ◽  
Author(s):  
Erdem Koyuncu ◽  
Hamid Jafarkhani
Keyword(s):  
Relay Selection ◽  
Amplify And Forward ◽  
Selection For

Secure Relay Selection for Two Way Amplify-and-Forward Untrusted Relaying Networks

2018 ◽  
Vol 67 (12) ◽  
pp. 11979-11987 ◽  
Author(s):  
Tamer Mekkawy ◽  
Rugui Yao ◽  
Nan Qi ◽  
Yanan Lu
Keyword(s):  
Relay Selection ◽  
Amplify And Forward ◽  
Selection For ◽  
Relaying Networks

Relay selection for secrecy improvement in cognitive amplify-and-forward relay networks against multiple eavesdroppers

2016 ◽  
Vol 10 (15) ◽  
pp. 2043-2053 ◽  
Author(s):  
Xiaojin Ding ◽  
Tiecheng Song ◽  
Yulong Zou ◽  
Xiaoshu Chen
Keyword(s):  
Relay Selection ◽  
Relay Networks ◽  
Amplify And Forward ◽  
Selection For

General and efficient relay selection for two‐way opportunistic amplify‐and‐forward relaying

2014 ◽  
Vol 50 (24) ◽  
pp. 1886-1888 ◽  
Author(s):  
Jing Li ◽  
Xiabin Qian ◽  
Jianhua Ge ◽  
Chensi Zhang
Keyword(s):  
Relay Selection ◽  
Amplify And Forward ◽  
Amplify And Forward Relaying ◽  
Selection For

scholarly journals Partial Relay Selection for Secure Cooperative NOMA Networks

2021 ◽  
Author(s):  
Wided Hadj Alouane
Keyword(s):  
Fading Channels ◽  
Relay Selection ◽  
Signal To Noise Ratio ◽  
Secrecy Outage Probability ◽  
Amplify And Forward ◽  
Decode And Forward ◽  
Partial Relay Selection ◽  
Asymptotic Expressions ◽  
Selection For ◽  
Secrecy Outage

Abstract In this paper, we investigate physical layer security of multi-relay non-orthogonal multiple access (NOMA) networks with partial relay selection considering decode-and-forward (DF) and amplify-and-forward (AF) protocols. We propose a partial relay scheme aiming to select the best relay based on the highest signal-to-noise-ratio (SNR) of the first link. We derive new exact and asymptotic expressions for strictly positive secrecy capacity (SPSC) and secrecy outage probability (SOP) considering Rayleigh fading channels. Numerical results demonstrate that AF and DF provide almost a similar secrecy performance. Moreover, they prove that partial relay selection improves SPSC and reduces SOP when the relay-cluster is closer to the legitimate receiver.

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