Physical Layer Security of Cooperative NOMA Systems with an Untrusted User

Jiang, Dan; Gao, Yuanyuan; Sha, Nan; Wang, Xiaoyu; Li, Na

doi:10.1109/icct56141.2022.10073079

Cited by 6 publications

(3 citation statements)

References 18 publications

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“…In addition, we employed both MRC and SC diversity techniques and derived both exact and asymptotic expressions for the performance metrics. Furthermore, from the simulation results, it can be deduced that our work achieves lower ρ values than what is presented in [21]- [22]. In addition, our study derives and validates the expressions corresponding to SPSC and ASR.…”

Section: Numerical and Simulation Resultssupporting

confidence: 56%

“…From the simulation results, we can say that the SOP of PU/SU decreases/increases as a 1 value increases/decreases, respectively as illustrated in Fig 8 . Finally, the SOP of PU/SU is intensionally decreases/increases when we vary a 1 value optimally. The simulated results as illustrated by figures 3 to 8 appear to be better in terms of both accuracy and efficiency when compared to the research works as portrayed in [21]- [22]. Notably, our investigation compares the level of privacy of overlay-CR-NOMA system which is equipped with both SA and MAs over Rayleigh fading channel.…”

Section: Numerical and Simulation Resultsmentioning

confidence: 71%

“…In addition, our study derives and validates the expressions corresponding to SPSC and ASR. Nevertheless, those parameters were not considered in the aforementioned works by [21]- [22]. As seen in Fig 9, the only way the SOP changes noticeably is if the target rate is changed under both pSIC (ζ = 0) and ipSIC (ζ = 0.1), respectively.…”

Section: Numerical and Simulation Resultsmentioning

confidence: 99%

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Investigations on Secrecy Performance of Downlink Overlay CR-NOMA System With SIC Imperfections

Godugu,

Vappangi

2024

IEEE Access

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Cognitive radio (CR) and non-orthogonal multiple access (NOMA) are two technologies witnessed to offer tremendous possibilities for the next generation wireless networks to maximise their usage of available spectrum. In this work, we evaluate the performance of a downlink overlay secure CR-NOMA system while the secondary transmitter (ST) is used as a decode-and-forward (DF) relay to assist the primary transmitter (PT) to transmit information to the destination i.e., primary user (PU), while covertly transmitting its own information to the secondary user (SU) against the eavesdropper (Eve) of PT. The secrecy performance comparison between two users i.e., PU and SU are obtained under perfect and imperfect successive interference cancellation (SIC), respectively. Furthermore, this paper investigates the secrecy performance comparison between the proposed overlay downlink CR-NOMA system comprising of single antenna (SA) and multiple antennas (MA) in terms of various performance metrics such as secrecy sum rate (SSR), the average secrecy rate (ASR), the average secrecy sum rate (ASSR), strictly positive secrecy rate (SPSC) and secrecy outage probability (SOP). It is to be noted that in our proposed system, MAs are equipped at both PT and ST with the main purpose to provide cooperative diversity and we employ both maximal ratio combining (MRC) and selection combining (SC) diversity techniques for processing the received signals at the PU/Eve which further improves the system's capacity and enhances the secrecy performance. In addition, for characterizing the secrecy performance of the proposed overlay CR-NOMA network, we present thoroughly the derivations of novel closed-form analytical expressions of the performance metrics such as SOP, SPSC and the ASR by taking into account both perfect SIC (pSIC) and imperfect SIC (ipSIC) scenarios. Based on the analytical frameworks, the numerical and simulation results are obtained under different network parameters. Towards this end, the outcomes of the simulation are shown to prove both the reliability of the mathematical analysis and the accuracy of the suggested technique.INDEX TERMS Non-orthogonal multiple access, physical layer security, overlay cognitive radio, secrecy rate, average secrecy rate, strictly positive secrecy rate.

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Section: Numerical and Simulation Resultssupporting

confidence: 56%

Section: Numerical and Simulation Resultsmentioning

confidence: 71%

Section: Numerical and Simulation Resultsmentioning

confidence: 99%

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Investigations on Secrecy Performance of Downlink Overlay CR-NOMA System With SIC Imperfections

Godugu,

Vappangi

2024

IEEE Access

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Secure transmission design in cooperative NOMA networks: Orienting toward user requirements

Jiang,

Gao,

et al. 2024

IET Communications

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This paper presents a full‐duplex and multi‐antenna relay‐aided transmission scheme for the user‐oriented perspective in cooperative non‐orthogonal multiple access (NOMA) systems. Relying on the service requirements, two legitimate users with security demands (SU) and quality of service (QoS) demands (QU) are paired for NOMA execution. The security of SU is enhanced through inverse power allocation of the conventional NOMA. The QoS requirements for QU are guaranteed, simultaneously. Then, the precoding design at the multi‐antenna relay has been exploited to improve the reliability demands of SU. Closed‐form expressions for SU's outage probability (OP) and intercepted probability, as well as QU's OP, are derived. The security–reliability trade‐off is also presented. Additionally, performance analysis under the half‐duplex and multi‐antenna scheme is provided as a benchmark for comparison. Finally, numerical simulations are performed to confirm the accuracy of the theoretical derivations under different schemes. Results demonstrate the superiority of the proposed scheme over benchmark schemes in terms of improving the security and reliability of SU, as well as saving power consumption of the system.

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Secrecy Performance of Overlay Cognitive Radio Inspired NOMA With Untrusted Secondary User

Priya Indraganti,

Vappangi

2024

IEEE Access

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Physical Layer Security of Cooperative NOMA Systems with an Untrusted User

Cited by 6 publications

References 18 publications

Investigations on Secrecy Performance of Downlink Overlay CR-NOMA System With SIC Imperfections

Investigations on Secrecy Performance of Downlink Overlay CR-NOMA System With SIC Imperfections

Secure transmission design in cooperative NOMA networks: Orienting toward user requirements

Secrecy Performance of Overlay Cognitive Radio Inspired NOMA With Untrusted Secondary User

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