A Mathematical Approach for Hidden Node Problem in Cognitive Radio Networks

Obite, Felix; Yusof, Kamaludin Mohammad; Din, Jafri

doi:10.12928/telkomnika.v15i3.6897

Cited by 4 publications

(4 citation statements)

References 30 publications

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“…And the lower bounds of the outage probability in (11) and (17) are shown to be tight bounds in the medium-and high-SNR regimes. At high SNR, the outage probability at D1 will become…”

Section: Outage Performance At High Snr and The Throughput On The Outage Probabilitymentioning

confidence: 91%

“…1967 strong users in NOMA can be forward signal to the weak users' messages in the second time slot in case of using half-duplex (HD) scheme and other relaying networks [15][16][17] can be depoyed in NOMA. Motivated by above analysis in [9], this paper presents a fixed power allocation scheme to show outage performance of separated users in the NOMA scheme in case of AF scheme is deployed.…”

mentioning

confidence: 99%

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Exact Outage Performance Analysis of Amplify-and-forward-aware Cooperative NOMA

Nguyen

2018

TELKOMNIKA

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In this paper, new radio access scheme that combines Amplify-and-Forward (AF) relaying protocol and non-orthogonal multiple access (NOMA) system is introduced. In particular, different scenarios for fixed power allocation scheme is investigated. In addition, the outage probability of both weak and strong user is derived and provided in closed-form expressions. Such outage is investigated in high SNR scenario and comparison performance between these NOMA scenarios is introduced. Numerical simulations are offered to clarify the outage performance of the considered scheme if varying several parameters in the existing schemes to verify the derived formulas.

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“…And the lower bounds of the outage probability in (11) and (17) are shown to be tight bounds in the medium-and high-SNR regimes. At high SNR, the outage probability at D1 will become…”

Section: Outage Performance At High Snr and The Throughput On The Outage Probabilitymentioning

confidence: 91%

mentioning

confidence: 99%

Exact Outage Performance Analysis of Amplify-and-forward-aware Cooperative NOMA

Nguyen

2018

TELKOMNIKA

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“…As such, the secondary user may induce undesirable interference to primary user receivers. In several research papers, cooperative sensing has been proposed as a successful approach to handle this issue by exploiting spatial diversity [49,100].…”

Section: E Sensing Challengesmentioning

confidence: 99%

A Review on SDR, Spectrum Sensing, and CR-based IoT in Cognitive Radio Networks

Kassri¹,

En‐Nouaary²,

Bah³

et al. 2021

IJACSA

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The inherent scarcity of frequency spectrum, along with the fixed spectrum allocation adopted policy, has led to a dire shortage of this indispensable resource. Furthermore, with the tremendous growth of wireless applications, this problem is intensified as the unlicensed frequency spectrum becomes overcrowded and unable to meet the requirement of emerging radio devices operating at higher data rates. Additionally, the already assigned spectrum is underutilized. That has prompted researchers to look for a way to address spectrum scarcity and enable efficient use of the available spectrum. In this context, Cognitive Radio (CR) technology has been proposed as a potential means to overcome this issue by introducing opportunistic usage to less congested portions of the licensed spectrum. In addition to outlining the fundamentals of Cognitive Radio, including Dynamic Spectrum Access (DSA) paradigms and CR functions, this paper has a three-fold objective: first, providing an overview of Software Defined Radio (SDR), in which the architecture, benefits, and ongoing challenges of SDR are presented; second, giving an extensive review of spectrum sensing, covering sensing types, narrowband and wideband sensing schemes with their pros and cons, Machine Learningbased sensing, and open issues that need to be further addressed in this field; third, exploring the use of Cognitive Radio in the Internet of Things (IoT) while highlighting the crucial contribution of CR in enabling IoT. This Review is elaborated in an informative fashion to help new researchers entering the area of Cognitive Radio Networks (CRN) to easily get involved.

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“…In other trend, the cooperative NOMA (C-NOMA) together with CRS as investigation in [13] in which spatially multiplexed scheme to serve a single user, while the other papers [9], [11] concentrated on scheme related to a group of users. Outage performance of several relaying networks can be explored in [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Exploiting Outage Performance of Wireless Powered NOMA

2018

TELKOMNIKA

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Considering a dual-hop energy-harvesting (EH) non-orthogonal multiple access (NOMA) relaying system, this paper consider novel relaying protocols based on time power switching-based relaying (TPSR) architecture for amplify-and-forward modes. We introduce novel system model relaying network with impacts of energy harvesting fractions and derive analytical expressions for outage probability for the information transmission link. It confirmed that right selection of power allocation for NOMA to obtain optimal performance. Theoretical results show that, in comparison with the conventional solutions, the proposed model can achieve optimal throughput efficiency for sufficiently small threshold SNR with condition of controlling time switching fractions and power splitting fractions appropriately in TPSR protocol. We also explore impacts of transmission distances in each hop, transmission rate, the other key parameters of TPSR to outage performance for different channel models. Simulation results are presented to corroborate the proposed methodology.

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A Mathematical Approach for Hidden Node Problem in Cognitive Radio Networks

Abstract: Cognitive radio (CR)

Cited by 4 publications

References 30 publications

Exact Outage Performance Analysis of Amplify-and-forward-aware Cooperative NOMA

Exact Outage Performance Analysis of Amplify-and-forward-aware Cooperative NOMA

A Review on SDR, Spectrum Sensing, and CR-based IoT in Cognitive Radio Networks

Exploiting Outage Performance of Wireless Powered NOMA

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