Secrecy Outage of Max–Min TAS Scheme in MIMO-NOMA Systems

Lei, Hongjiang; Zhang, Jianming; Park, Kihong; Xu, Peng; Zhang, Zufan; Pan, Gaofeng; Alouini, Mohamed‐Slim

doi:10.1109/tvt.2018.2824310

Cited by 82 publications

(81 citation statements)

References 53 publications

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“…It can be seen that the numerical evaluation curves match with analytical results. The exact asymptotic curves of SOP for the n-th user with ipSIC and pSIC are plotted based on (35) and (37), respectively. The exact asymptotic curve of SOP for the m-th user is plotted based on (40).…”

Section: A External Eavesdropping Scenariomentioning

confidence: 99%

Secure Communications in a Unified Non-Orthogonal Multiple Access Framework

Yue

Liu

Yao

et al. 2020

IEEE Trans. Wireless Commun.

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This paper investigates the impact of physical layer secrecy on the performance of a unified non-orthogonal multiple access (NOMA) framework, where both external and internal eavesdropping scenarios are examined. The spatial locations of legitimate users (LUs) and eavesdroppers are modeled by invoking stochastic geometry. To characterize the security performance, new exact and asymptotic expressions of secrecy outage probability (SOP) are derived for both code-domain NOMA (CD-NOMA) and power-domain NOMA (PD-NOMA), in which imperfect successive interference cancellation (ipSIC) and perfect SIC (pSIC) are taken into account. For the external eavesdropping scenario, the secrecy diversity orders by a pair of LUs (the n-th user and m-th user) for CD/PD-NOMA are obtained. Analytical results make known that the diversity orders of the n-th user with ipSIC/pSIC for CD-NOMA and PD-NOMA are equal to zero/K and zero/one, respectively. The diversity orders of the m-th user are equal to K/one for CD/PD-NOMA. For the internal eavesdropping scenario, we examine the analysis of secrecy diversity order and observe that the m-th user to wiretap the n-th user with ipSIC/pSIC for CD-NOMA and PD-NOMA provide the diversity orders of zero/K and zero/one, respectively, which is consistent with external eavesdropping scenario. Numerical results are present to confirm the accuracy of the analytical results developed and show that: i) The secrecy outage behavior of the n-th user is superior to that of the m-th user; ii) By increasing the number of subcarriers, CD-NOMA is capable of achieving a larger secrecy diversity gain compared to PD-NOMA.

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Section: A External Eavesdropping Scenariomentioning

confidence: 99%

Secure Communications in a Unified Non-Orthogonal Multiple Access Framework

Yue

Liu

Yao

et al. 2020

IEEE Trans. Wireless Commun.

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“…Transmit antenna selection (TAS) scheme has been verified as an effective scheme to enhance the secrecy performance of wireless communications [15], [36] - [39]. In this paper, three TAS schemes are proposed to improve the secrecy performance of mixed systems with imperfect CSI.…”

Section: B Motivation and Contributionsmentioning

confidence: 99%

On Secure Mixed RF-FSO Systems With TAS and Imperfect CSI

Lei

Luo

Park

et al. 2020

IEEE Trans. Commun.

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In this work, we analyze the secrecy outage performance of a dual-hop relay system composed of multiple-input-multiple-output radio-frequency (RF) links and a free-space optical (FSO) link while a multiple-antenna eavesdropper wiretaps the confidential information by decoding the received signals from the resource node. The channel state information (CSI) of the RF and FSO links is considered to be outdated. We propose three transmit antenna selection (TAS) schemes to enhance the secrecy performance of the considered systems. The secrecy outage performance with different TAS schemes is analyzed and the effects of misalignment and detection technology on the secrecy outage performance of mixed systems are studied. We derive the closed-form expressions for probability density function (PDF) and cumulative distribution function (CDF) over Málaga channel with imperfect CSI. Then the closed-form expressions for the CDF and PDF of the equivalent signal-to-noise ratio (SNR) at the legitimate receiver over Nakagami-m and Málaga channels are derived. Furthermore, the lower bound of the secrecy outage probability (SOP) with different TAS schemes are derived. Besides, the asymptotic results for SOP are investigated by exploiting the unfolding of Meijer's G-function when the electrical SNR of FSO link approaches infinity. Finally, Monte-Carlo simulation results are presented to testify the correctness of the proposed analysis. The results illustrate that the outdated CSI shows a strong effect on the secrecy outage performance. In addition, increasing the number of antennas at the source cannot significantly enhance the secrecy performance of the considered systems.Manuscript received.Mixed RF-FSO systems, outdated channel state information, physical layer security, secrecy outage probability, transmit antenna selection.

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“…where l (ξ) is a transfer function defined in (A.3). By substituting (7) and (8) into (6), the SOP of LU l can be obtained as (5). Remark 1.…”

Section: Performance Analysismentioning

confidence: 99%

“…Relaxing this assumption, the authors in [4] investigated the impact of physical layer secrecy on the performance of a NOMA system, where the imperfect successive interference cancellation (ipSIC) was considered. The authors in [5] studied the secrecy outage behaviours of multiple-inputmultiple-output (MIMO) NOMA, assuming max-min transmit antenna selection. In [6], the authors optimised transmission power by taking into account both the bounded CSI error and Gaussion CSI error models.…”

Section: Introductionmentioning

confidence: 99%