Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

IEEE Wireless Communications Letters

Security Provisioning for Non-Orthogonal Multiple Access Networks With Limited Feedback

Dawei Wang, Woping Xu, Wei Jie Liang, Zhiguo Ding, Lixin Li

Published Apr 8, 2020• 3 citations
Publisher

Abstract

In this letter, we investigate the information security problem for non-orthogonal multiple access (NOMA) networks against an external eavesdropper. Considering the overhead of the channel state information (CSI) feedback, we utilize the quantized CSI during the secure NOMA transmission, and derive the secrecy rate for each receiver by adopting the successive interference cancellation. In order to optimally allocate the transmit power, an optimization problem is formulated such that the minimum secrecy rate of the receivers is maximized. For the proposed scheme, we also analyze the secrecy outage and transmission outage probabilities, and their closed-form expressions are derived. In addition, the security-reliability tradeoff is analyzed. Numerical results are demonstrated to verify the analytical results.

DOI
10.1109/lwc.2020.2986443

Related papers

On the Design of Secure Non-Orthogonal Multiple Access Systems

Biao He, An Liu, Nan Yang +1 more

This paper proposes a new design of non-orthogonal multiple access (NOMA) under secrecy considerations. We focus on a NOMA system, where a transmitter sends confidential messages to multiple users in the presence of an external eavesdropper. The optimal designs of decoding order, transmission rates, and power allocated to each user are investigated. Considering the practical passive eavesdropping scenario where the instantaneous channel state of the eavesdropper is unknown, we adopt the secrecy outage probability as the secrecy metric. We first consider the problem of minimizing the transmit power subject to the secrecy outage and quality of service constraints, and derive the closed-form solution to this problem. We then explore the problem of maximizing the minimum confidential information rate among users subject to the secrecy outage and transmit power constraints, and provide an iterative algorithm to solve this problem. We find that the secrecy outage constraint in the studied problems does not change the optimal decoding order for NOMA, and one should increase the power allocated to the user whose channel is relatively bad when the secrecy constraint becomes more stringent. Finally, we show the advantage of NOMA over orthogonal multiple access in the studied problems both analytically and numerically.

arXiv:1612.06961•IEEE Journal on Selected Areas in Communications•Jul 17, 2017•208 citations

Secure Transmission to the Strong User in Non-Orthogonal Multiple Access

Youhong Feng, Shihao Yan, Zhen Yang

With non-orthogonal multiple access (NOMA) in a passive eavesdropping scenario, we tackle the maximization of the secrecy rate for the strong user subject to a maximum allowable secrecy outage probability while guaranteeing a constraint on the transmission rate to the weak user. For the first time, the dependence between the eavesdropper's ability to conduct successive interference cancellation and her channel quality is considered. We determine the exact optimal power allocation and redundancy rate, based on which the cost of security in terms of the reduction in the strong user's secrecy rate is examined, and the benefits of NOMA for secure transmissions are revealed.

IEEE Communications Letters•Oct 22, 2018•22 citations

Secure transmission for NOMA systems with imperfect SIC

Zhongwu Xiang, Xiaobing Tong, Yueming Cai

This paper investigates secure transmission for non-orthogonal multiple access (NOMA) systems where the imperfect successive interference cancellation (SIC) is considered at both legitimate users and eavesdropper (Eve). A power allocation scheme is designed for the legitimate users to mitigate the effect of the SIC error caused by imperfect SIC. For characterizing the secrecy performance of the NOMA system, the closed-form expressions for connection outage probability (COP), secrecy outage probability (SOP), and effective secrecy throughput (EST) are derived over Nakagami-m fading channels in both NOMA and benchmark orthogonal multiple access (OMA) systems. We also provide security and reliability trade-off results (SRT) for the users in the NOMA and OMA systems. Simulation results verify our analysis and show that the strong users achieve better secrecy performance but worse reliability performance and NOMA outperforms OMA in terms of SRT.

China Communications•Nov 1, 2020•31 citations

Secure Transmission to the Strong User with Optimal Power Allocation in NOMA

Youhong Feng, Shihao Yan, Yang Zhen

With non-orthogonal multiple access(NOMA), we tackle the maximization of the secrecy rate for the strong user subject to a maximum allowable secrecy outage probability, while guaranteeing a constraint on the transmission rate to the weak user. For the first time, the dependence between the eavesdropper's ability to conduct successive interference cancellation and her channel quality is considered. We determine the optimal power allocation and the redundancy rate, based on which the cost of security in terms of the reduction in the strong user's secrecy rate is examined and the benefits of NOMA for secure transmissions are explicitly revealed.

arXiv:1807.00935•Jul 3, 2018•7 citations

Covert and Secure Communications in NOMA Networks With Internal Eavesdropping

Qiang Li, Dongyang Xu, Keivan Navaie +1 more

This letter proposes a joint covert and secure transmission scheme in the non-orthogonal multiple access (NOMA) networks against internal eavesdropping and external monitoring. In the network, the strong user wiretaps the signals of the weak user while an external warden monitors the communication behaviors of the strong user. To address the issue, a random artificial noise (AN) based beamforming is adopted, which not only reduces the eavesdropping rate of the strong user but also confuses the warden. We consider the worst case, where the warden can minimize the detection error probability (DEP) by optimizing its detection threshold. Further, we characterize the closed-form expressions of the average minimum DEP of the warden, the connection outage probabilities of the NOMA users and the secrecy outage probability of the weak user under the imperfect successive interference cancellation (SIC). To improve the performance, an effective covert rate maximization problem is formulated, under the constraints of the covertness, reliability and secrecy, which is analytically solved. Numerical results validate the superiority of the proposed scheme.

IEEE Wireless Communications Letters•Sep 7, 2023•25 citations

Improper Gaussian Signalings for Secure Non-Orthogonal Multiple Access

Hyeonsik Yeom, Jeongseok Ha

This paper studies a downlink single-input-single-output (SISO) non-orthogonal multiple access (NOMA) systems in which a transmitter and a pair of legitimate receivers communicate with each other by using improper Gaussian signalings. There is an eavesdropper who overhears the information transmitted to the pair of legitimate receivers. Proper Gaussian signalings have been known as optimal on channels without interference, due to which proper Gaussian signalings have been widely used in many areas. Recently, it has been shown that improper Gaussian signalings improve achievable rates of NOMA systems. In this paper, we extend the application of improper Gaussian signalings to the secure NOMA systems. More specifically, we derive closed-form expressions of secrecy outage probability for users and analyze the effects of impropriety on the secrecy outage probability. Based on the mathematical analysis, we propose an algorithm to find the optimal impropriety degree for the secure NOMA. To confirm the analytic results, we perform extensive numerical evaluations and show that the analytic and numerical results are well matched each other. In addition, the NOMA systems based on improper and proper Gaussian signalings are compared in terms of the secrecy outage probability. The comparison substantiates our claim that a better secrecy performance is achievable with the improper Gaussian signalings.

International Conference on Information and Communication Technology Convergence (ICTC)•Oct 19, 2022•0 citations
In this letter, we investigate the information security problem for non-orthogonal multiple access (NOMA) networks against an external eavesdropper. Considering the overhead of the channel state information (CSI) feedback, we utilize the quantized CSI during the secure NOMA transmission, and derive the secrecy rate for each receiver by adopting the successive interference cancellation. In order to optimally allocate the transmit power, an optimization problem is formulated such that the minimum secrecy rate of the receivers is maximized. For the proposed scheme, we also analyze the secrecy outage and transmission outage probabilities, and their closed-form expressions are derived. In addition, the security-reliability tradeoff is analyzed. Numerical results are demonstrated to verify the analytical results.
This paper proposes a new design of non-orthogonal multiple access (NOMA) under secrecy considerations. We focus on a NOMA system, where a transmitter sends confidential messages to multiple users in the presence of an external eavesdropper. The optimal designs of decoding order, transmission rates, and power allocated to each user are investigated. Considering the practical passive eavesdropping scenario where the instantaneous channel state of the eavesdropper is unknown, we adopt the secrecy outage probability as the secrecy metric. We first consider the problem of minimizing the transmit power subject to the secrecy outage and quality of service constraints, and derive the closed-form solution to this problem. We then explore the problem of maximizing the minimum confidential information rate among users subject to the secrecy outage and transmit power constraints, and provide an iterative algorithm to solve this problem. We find that the secrecy outage constraint in the studied problems does not change the optimal decoding order for NOMA, and one should increase the power allocated to the user whose channel is relatively bad when the secrecy constraint becomes more stringent. Finally, we show the advantage of NOMA over orthogonal multiple access in the studied problems both analytically and numerically.
With non-orthogonal multiple access (NOMA) in a passive eavesdropping scenario, we tackle the maximization of the secrecy rate for the strong user subject to a maximum allowable secrecy outage probability while guaranteeing a constraint on the transmission rate to the weak user. For the first time, the dependence between the eavesdropper's ability to conduct successive interference cancellation and her channel quality is considered. We determine the exact optimal power allocation and redundancy rate, based on which the cost of security in terms of the reduction in the strong user's secrecy rate is examined, and the benefits of NOMA for secure transmissions are revealed.
This paper investigates secure transmission for non-orthogonal multiple access (NOMA) systems where the imperfect successive interference cancellation (SIC) is considered at both legitimate users and eavesdropper (Eve). A power allocation scheme is designed for the legitimate users to mitigate the effect of the SIC error caused by imperfect SIC. For characterizing the secrecy performance of the NOMA system, the closed-form expressions for connection outage probability (COP), secrecy outage probability (SOP), and effective secrecy throughput (EST) are derived over Nakagami-m fading channels in both NOMA and benchmark orthogonal multiple access (OMA) systems. We also provide security and reliability trade-off results (SRT) for the users in the NOMA and OMA systems. Simulation results verify our analysis and show that the strong users achieve better secrecy performance but worse reliability performance and NOMA outperforms OMA in terms of SRT.
With non-orthogonal multiple access(NOMA), we tackle the maximization of the secrecy rate for the strong user subject to a maximum allowable secrecy outage probability, while guaranteeing a constraint on the transmission rate to the weak user. For the first time, the dependence between the eavesdropper's ability to conduct successive interference cancellation and her channel quality is considered. We determine the optimal power allocation and the redundancy rate, based on which the cost of security in terms of the reduction in the strong user's secrecy rate is examined and the benefits of NOMA for secure transmissions are explicitly revealed.
This letter proposes a joint covert and secure transmission scheme in the non-orthogonal multiple access (NOMA) networks against internal eavesdropping and external monitoring. In the network, the strong user wiretaps the signals of the weak user while an external warden monitors the communication behaviors of the strong user. To address the issue, a random artificial noise (AN) based beamforming is adopted, which not only reduces the eavesdropping rate of the strong user but also confuses the warden. We consider the worst case, where the warden can minimize the detection error probability (DEP) by optimizing its detection threshold. Further, we characterize the closed-form expressions of the average minimum DEP of the warden, the connection outage probabilities of the NOMA users and the secrecy outage probability of the weak user under the imperfect successive interference cancellation (SIC). To improve the performance, an effective covert rate maximization problem is formulated, under the constraints of the covertness, reliability and secrecy, which is analytically solved. Numerical results validate the superiority of the proposed scheme.
This paper studies a downlink single-input-single-output (SISO) non-orthogonal multiple access (NOMA) systems in which a transmitter and a pair of legitimate receivers communicate with each other by using improper Gaussian signalings. There is an eavesdropper who overhears the information transmitted to the pair of legitimate receivers. Proper Gaussian signalings have been known as optimal on channels without interference, due to which proper Gaussian signalings have been widely used in many areas. Recently, it has been shown that improper Gaussian signalings improve achievable rates of NOMA systems. In this paper, we extend the application of improper Gaussian signalings to the secure NOMA systems. More specifically, we derive closed-form expressions of secrecy outage probability for users and analyze the effects of impropriety on the secrecy outage probability. Based on the mathematical analysis, we propose an algorithm to find the optimal impropriety degree for the secure NOMA. To confirm the analytic results, we perform extensive numerical evaluations and show that the analytic and numerical results are well matched each other. In addition, the NOMA systems based on improper and proper Gaussian signalings are compared in terms of the secrecy outage probability. The comparison substantiates our claim that a better secrecy performance is achievable with the improper Gaussian signalings.