中继选择NOMA无线系统的物理层安全

doi:10.11959/j.issn.1000-0801.2024077

Abstract

Abstract:

Aiming at poor performance of physical layer security (PLS) of decode-and-forward cooperative nonorthogonal multiple access (NOMA) systems and its performance deterioration in the presence of multi-eavesdropper, the PLS model of multi-relay selection NOMA wireless systems using modify-and-forward (MF) protocol was proposed.The approximate expressions of secrecy outage probability(SOP) and asymptotic SOP of multi-relay selection MF-NOMA wireless systems with non-colluding or colluding eavesdropping scenarios were derived by using GaussChebyshev Quadrature theorem.The simulation results verify the accuracy of PLS performance analysis of the above MF-NOMA wireless systems.The results also indicate that the PLS performance of multi-relay selection MF-NOMA wireless systems will be improved when the number of relays increases or the number of eavesdroppers decreases, and that colluding eavesdropping is more detrimental to secure transmission of multi-relay MF-NOMA wireless systems than non-colluding eavesdropping.

Key words: non-orthogonal multiple access, modify-and-forward, relay selection, physical layer security, secrecy outage probability

CLC Number:

TN918.1

Yancui LUO, Guangqiu LI, Mingzhu YE, Hui GAO, Yajuan ZHANG. Physical layer security of relay selection NOMA wireless systems[J]. Telecommunications Science, 2024, 40(3): 116-127.

Figures/Tables 7

参数名称	符号表示	参数值	参数说明
功率分割因子	a₁、a₂	0.3、0.7	图2～图3、图5～图6
中继节点数	K	3	图2～图5
窃听节点数	M	2	图2、图4～图6
窃听链路平均信噪比/dB	ρ_E	0	图2～图5
路径损耗系数	α	4	图2～图5
目标安全速率/(bit ·(s · Hz)^-1)	$δ_{1} 、 δ_{2}$	1、0.2	图3～图6
S与R_k 间的距离	$d_{{SR}_{k}}$	0.5	图2～图4、图6
R_k 与D_i间的距离	$d_{R_{k} D_{1}} 、 d_{R_{k} D_{2}}$	0.25、0.5	图2～图6
S与E_m间的距离	$d_{{SE}_{m}}$	1.2	图2～图6
高斯-切比雪夫项数	N	100	图2～图6

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