Outage Analysis and Power Allocation in Uplink Non-Orthogonal Multiple Access Systems

Liu, Ye; Derakhshani, Mahsa; Lambotharan, Sangarapillai

doi:10.1109/lcomm.2017.2769088

Cited by 46 publications

(30 citation statements)

References 12 publications

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“…This approximation holds due to the distinct channels gains and reflection coefficients which are stated in (4) and (5), respectively. Consequently, has infinitesimal effect on Pr(SINR k1 ≥ γ) compared to γ N l j=3 P u ζ kj h 2 kj d −2α kj [24]. Hence, the events SINR k1 ≥ γ and SINR k2 ≥ γ are approximately independent.…”

Section: Problem Formulationmentioning

confidence: 99%

UAV Data Collection Over NOMA Backscatter Networks: UAV Altitude and Trajectory Optimization

Farajzadeh

Erçetin

Yanıkömeroğlu

2019

ICC 2019 - 2019 IEEE International Conference on Communications (ICC)

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The recent evolution of ambient backscattering technology has the potential to provide long-range and lowpower wireless communications. In this work, we study the unmanned aerial vehicle (UAV)-assisted backscatter networks where the UAV acts both as a mobile power transmitter and as an information collector. We aim to maximize the number of successfully decoded bits in the uplink while minimizing the UAV's flight time by optimizing its altitude. Power-domain NOMA scheme is employed in the uplink. An optimization framework is presented to identify the trade-off between numerous network parameters, such as UAV's altitude, number of backscatter devices, and backscatter coefficients. Numerical results show that an optimal altitude is computable for various network setups and that the impact of backscattering reflection coefficients on the maximum network throughput is significant. Based on this optimal altitude, we also show that an optimal trajectory plan is achievable.Index Terms-Internet of Things (IoT), Ambient backscattering, Unmanned Aerial Vehicle (UAV), Non-Orthogonal Multiple Access (NOMA).

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Section: Problem Formulationmentioning

confidence: 99%

UAV Data Collection Over NOMA Backscatter Networks: UAV Altitude and Trajectory Optimization

Farajzadeh

Erçetin

Yanıkömeroğlu

2019

ICC 2019 - 2019 IEEE International Conference on Communications (ICC)

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“…As for the single-carrier NOMA uplink, its outage analysis was disseminated in [31]- [33] under statistical CSI, but the analysis was limited to at most three users. In [10], Liu et al extended the outage analysis of the single-carrier NOMA uplink to an arbitrary number of users. Furthermore, Wang et al [11] analyzed the outage probability of NOMA for independent but not identically distributed (i.ni.d) Rayleigh fading environments.…”

Section: A Literature Reviewmentioning

confidence: 99%

“…In (10), N n=1 Z n is represented as a product of binomials. As N increases, the product will result in higher-order terms related to the product of the…”

Section: A Outage Probability Of Usermentioning

confidence: 99%

Outage Probability Analysis for the Multi-Carrier NOMA Downlink Relying on Statistical CSI

Derakhshani

Lambotharan

et al. 2020

IEEE Trans. Commun.

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In this treatise, we derive tractable closed-form expressions for the outage probability of the single cell multicarrier non-orthogonal multiple access (MC-NOMA) downlink, where the transmitter side only has statistical CSI knowledge. In particular, we analyze the outage probability with respect to the total data rates (summed over all subcarriers), given a minimum target rate for the individual users. The calculation of outage probability for the distant user is challenging, since the total rate expression is given by the sum of logarithmic functions of the ratio between two shifted exponential random variables, which are dependent. In order to derive the closed-form outage probability expressions both for two subcarriers and for a general case of multiple subcarriers, efficient approximations are proposed. The probability density function (PDF) of the product of shifted exponential distributions can be determined for the near user by the Mellin transform and the generalized upper incomplete Fox's H function. Based on this PDF, the corresponding outage probability is presented. Finally, the accuracy of our outage analysis is verified by simulation results.

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“…Similarly, in [5], the authors proposed an advanced multi-user decoding strategy based on the statistical channel state information (CSI) and derived the corresponding closed form OP for two users. Considering the general case of M users, Liu et al [6] and Wang et al [7] resorted to approximations in order to derive the OP of uplink NOMA systems. Although instructive, all these works were built upon the classical assumption of additive white Gaussian noise (AWGN).…”

Section: Introductionmentioning

confidence: 99%

Effect of Impulsive Noise on Uplink NOMA Systems

Selim

Alam

Kaddoum

et al. 2020

IEEE Trans. Veh. Technol.

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Non-orthogonal multiple access (NOMA) was recently proposed as a viable technology that can potentially provide the spectral efficiency, low latency, and massive connectivity requirements of future radio networks. In this context, numerous ultra-high reliability technologies such as the industrial Internet of things, smart grids, and smart homes present environments which are characterized by the presence of impulsive electromagnetic interference, known as impulsive noise. Under such conditions, the power domain multiplexing in NOMA is expected to render the system particularly sensitive to this additional impulsive noise. Therefore, in this article, we quantify the effects of impulsive noise on the outage performance of uplink NOMA systems. Extensive Monte-Carlo simulations as well as offered analytical results demonstrate the vulnerability of the involved NOMA users to this type of noise. This highlights the need for effective modeling of the impulsive noise as well as the design of mitigation techniques that are suitable for the particular demands and challenges of NOMA.Index Terms-Non-orthogonal multiple access, impulsive noise, uplink, outage probability.

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Outage Analysis and Power Allocation in Uplink Non-Orthogonal Multiple Access Systems

Cited by 46 publications

References 12 publications

UAV Data Collection Over NOMA Backscatter Networks: UAV Altitude and Trajectory Optimization

UAV Data Collection Over NOMA Backscatter Networks: UAV Altitude and Trajectory Optimization

Outage Probability Analysis for the Multi-Carrier NOMA Downlink Relying on Statistical CSI

Effect of Impulsive Noise on Uplink NOMA Systems

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