Security and Reliability Performance Analysis of Cooperative Multi-Relay Systems With Nonlinear Energy Harvesters and Hardware Impairments

Li, Xingwang; Huang, Minyi; Zhang, Changsen; Deng, Dan; Rabie, Khaled M.; Ding, Yuan; Du, Jianhe

doi:10.1109/access.2019.2930664

Cited by 45 publications

(33 citation statements)

References 53 publications

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“…The same definitions for ς p,q , λ q below (39) are valid in terms of ϕ q in (43) and (44). Lastly, substituting (38), (40), (42) and (44) into (36), the ABEPs of users are derived as in (45) and (46), as shown at the bottom of this page.…”

Section: Bit Error Probability (Bep)mentioning

confidence: 99%

Improved User Fairness in Decode-Forward Relaying Non-Orthogonal Multiple Access Schemes With Imperfect SIC and CSI

Kara

Kaya

2020

IEEE Access

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Non-orthogonal multiple access (NOMA) is one of the key technologies to serve in ultradense networks with massive connections which is crucial for Internet of Things. Besides, NOMA provides better spectral efficiency compared to orthogonal multiple access. However, NOMA systems have been mostly investigated only in terms of ergodic capacity (EC) and outage probability (OP) whereas error performances have not been well-studied. In addition, in those analysis, mostly perfect successive interference canceler (SIC) is assumed or the considered imperfect SIC model is not reasonable. Besides, channel state information (CSI) errors are also not considered in most studies. However, this is not the case for the practical scenarios, and these imperfect SIC and CSI effects limit the performance of NOMA involved systems. Moreover, the imperfect SIC causes unfairness between users. In this paper, we introduce reversed decode-forward relaying NOMA (R-DFNOMA) to improve user fairness compared to conventional DFNOMA (C-DFNOMA). In the analysis, we define imperfect SIC effect as dependant to channel fading and with this imperfect SIC and CSI errors, we derive exact expressions of EC and OP. We also provide upper bound for EC, and asymptotic and lower bound expressions for OP. Furthermore, we evaluate bit error performance of the proposed R-DFNOMA and derive exact bit error probability (BEP) in closed-form with imperfect CSI which is the first study analyzing error performances of decode-forward relaying NOMA with imperfect CSI. Then, we define user fairness index in terms of all key performance indicators (KPIs) (i.e., EC, OP and BEP). Based on extensive simulations, all derived expressions are validated, and it is proved that the proposed R-DFNOMA provides better user fairness than C-DFNOMA in terms of all KPIs. Finally, we discuss the effect of power allocations at both source and relay on the performance metrics and user fairness.

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Section: Bit Error Probability (Bep)mentioning

confidence: 99%

Improved User Fairness in Decode-Forward Relaying Non-Orthogonal Multiple Access Schemes With Imperfect SIC and CSI

Kara

Kaya

2020

IEEE Access

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“…Since the broadcast characteristic of wireless transmission, the IoT networks are more vulnerable to attack by illegal users, thus, wireless communication urgently requires a communication network with a higher degree of information security [13]. As the basis of communication networks, information security is showing unprecedented importance [14].…”

Section: Introduction a Backgroundmentioning

confidence: 99%

Physical Layer Security of Cooperative NOMA for IoT Networks Under I/Q Imbalance

Zhao

Gao

et al. 2020

IEEE Access

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In this paper, we investigate the reliability and security of cooperative dual-hop non-orthogonal multiple access (NOMA) for internet-of-thing (IoT) networks, in which the transceivers consider a detrimental factor of in-phase and quadrature-phase imbalance (IQI). The communication between the source and destination is accomplished through a decode-and-forward (DF) relay in the presence of an eavesdropper. In order to characterize the performance of the considered system, exact analytical expressions for the outage probability (OP) and intercept probability (IP) are derived in closed-form. Furthermore, to better understanding the performance of the considered system, we further derive the asymptotic expressions of OP in the high signal-to-noise ratio (SNR) regime and IP at the high main eavesdropping ratio (MER) region. A large number of analysis and Monte Carlo simulation results show that the existence of IQI usually increases the corresponding OP and reduces the IP, which means that reduces the reliability of the system and improves the security. In addition, the provided results provide useful insights into the trade-off between reliability and security of secure cooperative communication systems. INDEX TERMS Cooperative communication, in-phase and quadrature-phase imbalance, Internet-of-Things, physical layer security, non-orthogonal multiple access.

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“…By introducing multi-antenna into the NOMA systems, it can achieve the advantages of multi-antenna and NOMA. Therefore, some research works have investigated the combined technology; see [34][35][36][37][38] and the references therein. Authors in [34] studied the performance of multiple-antenna NOMA and OMA, and it indicated that the performance of multiple-antenna NOMA outperforms that of multiple-antenna OMA one.…”

Section: Introductionmentioning

confidence: 99%

“…The antenna selection (AS) technology has the advantages of low cost, low complexity, high diversity gains, which can solve the computational complexity and power consumption issues caused by multiple antennas. Therefore, the combination of NOMA and AS has attracted significant attention [35][36][37][38]. In [35], the authors analyzed the secure outage performance of MISO-NOMA systems by deriving the exact analytical expressions of SOP under optimal antenna selection (OAS) and suboptimal antenna selection (SAS) schemes, and proposed an effective power allocation scheme to obtain the non-zero diversity order under the two AS schemes.…”

Section: Introductionmentioning

confidence: 99%

“…The authors analyzed the security performance of the uplink NOMA system, where the BS is equipped with multiple antennas [36]. Regarding hardware impairments at transceiver, the authors of [38] investigated the reliability and security of multiple-antenna cooperative networks by proposing three SC schemes [37]. The most widely used is SC where the destination selects a branch with the highest SNR to be connected to the output portion of the receiver.…”

Section: Introductionmentioning

confidence: 99%

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Security Analysis of Multi-Antenna NOMA Networks Under I/Q Imbalance

Zhao

Zhang

et al. 2019

Electronics

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This paper investigates the reliability and security performance of the downlink non-orthogonal multiple access (NOMA) networks over Nakagami-m fading channels, where the base station (BS) aims to communicate with multi-antenna NOMA users in the presence of a multi-antenna eavesdropper. To be more practical, a detrimental factor at both transmitter and receiver is considered, namely in-phase and quadrature-phase imbalance (IQI). To further improve the reliability and security of the considered networks, the selection combining (SC) algorithm at the receiver is taken into account. More specifically, the exact analytical expressions for the outage probability (OP) and the intercept probability (IP) are derived in closed-form. To obtain a better understanding of the influence for the IQI parameters on the system performance, the asymptotic behaviors for the outage probabilities (OPs) in the high signal-to-noise ratio (SNR) region are analyzed. Based on the asymptotic results, the diversity order of the considered system are obtained and discussed. The numerical results are presented to verify the validity of the theoretical analysis.

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Security and Reliability Performance Analysis of Cooperative Multi-Relay Systems With Nonlinear Energy Harvesters and Hardware Impairments

Cited by 45 publications

References 53 publications

Improved User Fairness in Decode-Forward Relaying Non-Orthogonal Multiple Access Schemes With Imperfect SIC and CSI

Improved User Fairness in Decode-Forward Relaying Non-Orthogonal Multiple Access Schemes With Imperfect SIC and CSI

Physical Layer Security of Cooperative NOMA for IoT Networks Under I/Q Imbalance

Security Analysis of Multi-Antenna NOMA Networks Under I/Q Imbalance

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