Fundamental Limits of Spectrum Sharing for NOMA-Based Cooperative Relaying Under a Peak Interference Constraint

Kumar, Vaibhav; Cardiff, Barry; Flanagan, Mark F.

doi:10.1109/tcomm.2019.2945292

Cited by 23 publications

(8 citation statements)

References 26 publications

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“…There are other existing literature on cooperative CR-NOMA networks [13]- [16]. For example, Kumar et al studied the sum rate and outage probability (OP) of an underlay relaying CR-NOMA [13], where they showed that the CR-NOMA system performs better than the CR-OMA one. A cognitive NOMA scheme where the strong user performs spectrum sensing was studied by Jia et al [14].…”

Section: Related Workmentioning

confidence: 99%

“…Hence, there is a need to investigate the influence of HIs and imperfect SIC on underlay CR-NOMA networks as they can degrade the system performance in terms of the OP, spectral efficiency (SE), ergodic capacity, etc. Accordingly, in contrast to [13], [25], [26], where no or only imperfect CSI was considered, this paper investigates the OP of a generalized and imperfect CR-NOMA, where nonideality is modeled by accounting for practical system limitations such as hardware impairments (HIs), CSI imperfections, and residual interference caused by error propagation during SIC. Moreover, different from [4], where the system was studied by neglecting the effect of the additive white Gaussian noise (AWGN), we study interference-and noise-limited CR-NOMA network with aforementioned system limitations.…”

Section: Related Workmentioning

confidence: 99%

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Hardware and Interference Limited Cooperative CR-NOMA Networks Under Imperfect SIC and CSI

Arzykulov

Nauryzbayev

Çelik

et al. 2021

IEEE Open J. Commun. Soc.

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The conflation of cognitive radio (CR) and non-orthogonal multiple access (NOMA) concepts is a promising approach to fulfill the massive connectivity goals of future networks given the spectrum scarcity. Accordingly, this paper investigates the performance of a cooperative CR-NOMA network in the presence of system impairments and interference. Our analysis is involved with the derivation of the end-to-end outage probability for primary and secondary networks by accounting for channel state information (CSI), hardware imperfections, and residual interference caused by successive interference cancellation errors as well as coexisting primary/secondary users. Moreover, a mathematically tractable upper bound on spectral efficiency (SE) with its high-SNR approximations are derived. Besides, we propose an optimal power allocation scheme for CR-NOMA users to guarantee their outage and SE fairness. The numerical results validated by Monte Carlo simulations show that the CR-NOMA network provides a superior outage performance over orthogonal multiple access. Furthermore, the higher level of system imperfections leads to the performance degradation of the CR-NOMA networks. As imperfections become more severe, the CR-NOMA is observed to deliver relatively inferior outage and SE performance as compared to the perfect system scenario.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Hardware and Interference Limited Cooperative CR-NOMA Networks Under Imperfect SIC and CSI

Arzykulov

Nauryzbayev

Çelik

et al. 2021

IEEE Open J. Commun. Soc.

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“…Our particular interest in this paper is the underlay mode of operation, where the secondary users are allowed to utilize the licensed spectrum with a strict constraint that the secondary users maintain the transmit power within a tolerable interference limit of the primary nodes. Good amount of literature on investigating the performance of CRNs is available (see [5]- [11] and the references therein). However, the security against jamming and eavesdropping attacks in CRNs is of prime concern, which occurs due to its highly adaptive nature and functionality in open wireless communication medium [12], [13].…”

Section: A Backgroundmentioning

confidence: 99%

Secrecy Performance of SIMO Underlay Cognitive Radio Networks Over α – μ Fading Channels

Yadav

Gurjar

2021

IEEE Access

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This paper investigates the secrecy performance of a single-input multiple-output (SIMO) based underlay cognitive radio networks. In particular, a single-antenna secondary transmitter transmits its secret message to a multi-antenna equipped secondary node in the presence of a multi-antenna equipped passive eavesdropper under a peak interference constraint at the single-antenna primary receiver. We proficiently derive the expressions for secrecy outage probability (SOP), intercept probability, and ergodic secrecy capacity (ESC) for the considered system over α − µ fading channels. Further, we carry out the asymptotic analysis of SOP and intercept probability under two cases of interest; 1) when the average signal-to-noise ratio (SNR) of the main link, i.e., between the secondary source and secondary destination, goes to infinity with a fixed average SNR of wiretap link between the secondary source and secondary eavesdropper, and 2) when the SNRs of both the main and wiretap links tend to infinity. We can infer that a secrecy diversity order of α D N D µ D 2

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“…Substituting the expression for f gw (x) (derived in Appendix B) into (9) and solving the integral similar to that in Appendix B, we obtain…”

Section: Case S-i: Statistical Il-csi and Instantaneousmentioning

confidence: 99%

“…The superiority of NOMA in an underlay spectrum sharing scenario over its OMA-based counterpart, in terms of the average achievable rate, outage probability and ergodic sum secrecy rate, has been well-established in [9]- [11]. However, to the best of the authors' knowledge, the delay-constrained analysis of a spectrum sharing NOMA system has not yet been presented in the open literature.…”

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confidence: 99%

On the Effective Rate of NOMA in Underlay Spectrum Sharing

Kumar

Ding

Flanagan

2021

IEEE Trans. Veh. Technol.

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In this paper, we present the delay-constrained performance analysis of a multi-antenna-assisted multiuser nonorthogonal multiple access (NOMA) based spectrum sharing system over Rayleigh fading channels. We derive analytical expressions for the sum effective rate (ER) for the downlink NOMA system under a peak interference constraint. In particular, we show the effect of the availability of different levels of channel state information (instantaneous and statistical) on the system performance. We also show the effect of different parameters of interest, including the peak tolerable interference power, the delay exponent, the number of antennas and the number of users, on the sum ER of the system under consideration. An excellent agreement between simulation and theoretical results confirms the accuracy of the analysis. I. INTRODUCTIONW ITH an explosive growth in the number of wireless communication devices and users, along with an unprecedented growth in internet traffic, one of the major challenges for the development of beyond-fifth-generation (B5G) systems is to accommodate a massive number of devices into a congested spectrum. Moreover, with the development of new wireless services, there is a new wave of applications which are extremely delay sensitive. Such applications include live video streaming, online gaming, vehicle-to-everything (V2X) communications and tactile Internet. NOMA and spectrum sharing are two major technologies that can mitigate the problem of spectrum scarcity while also providing massive connectivity with low latency. It is well-known that NOMA facilitates spectrum sharing and can also enhance the secrecy performance of unmanned aerial vehicle (UAV) aided simultaneous wireless information and power transfer (SWIPT) [1] as well as that of the primary/licensed network [2].The average achievable rate is one of the commonly used metrics to evaluate the performance of a wireless communication system. However, it is important to note that this metric is based on Shannon's channel capacity formula, which does not take into account the queuing delay at the transmitter. In order to quantify the delay-constrained performance of a wireless communications system, the concept of effective rate (also known as effective capacity 1 or link-layer capacity)

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Fundamental Limits of Spectrum Sharing for NOMA-Based Cooperative Relaying Under a Peak Interference Constraint

Cited by 23 publications

References 26 publications

Hardware and Interference Limited Cooperative CR-NOMA Networks Under Imperfect SIC and CSI

Hardware and Interference Limited Cooperative CR-NOMA Networks Under Imperfect SIC and CSI

Secrecy Performance of SIMO Underlay Cognitive Radio Networks Over α – μ Fading Channels

On the Effective Rate of NOMA in Underlay Spectrum Sharing

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