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   Articles with "underlay cognitive" as a keyword



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A new protocol for concurrently allocating licensed spectrum to underlay cognitive users

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recommendations! Published in 2017 at "Digital Communications and Networks"

DOI: 10.1016/j.dcan.2017.04.004

Abstract: Abstract Cognitive radio technology makes efficient use of the valuable radio frequency spectrum in a non-interfering manner to solve the problem of spectrum scarcity. This paper aims to design a scheme for the concurrent use… read more here.

Keywords: maca; new protocol; cognitive users; underlay cognitive ... See more keywords
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Secrecy Outage Analysis on Underlay Cognitive Radio System With Full-Duplex Secondary User

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recommendations! Published in 2017 at "IEEE Access"

DOI: 10.1109/access.2017.2769131

Abstract: In this paper, an underlay cognitive radio system, which consists of a primary-user (PU) transmitter (TX), a PU receiver (RX), a secondary-user (SU) TX, and a SU_RX, is considered. Benefitting from the underlay mode, SU_TX… read more here.

Keywords: system; secrecy; secrecy outage; cognitive radio ... See more keywords
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Outage and Error-Rate Analysis of NOMA-Inspired Multicarrier Underlay Cognitive Radio System

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recommendations! Published in 2022 at "IEEE Access"

DOI: 10.1109/access.2022.3217493

Abstract: In this paper, the performance of a multicarrier underlay cognitive radio system is analyzed considering that the successive interference cancellation (SIC) method is used for detection. In the proposed system model, a multicarrier-based secondary user… read more here.

Keywords: system; multicarrier underlay; underlay cognitive; error ... See more keywords
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On Secrecy Outage of Relay Selection in Underlay Cognitive Radio Networks Over Nakagami- $m$ Fading Channels

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recommendations! Published in 2017 at "IEEE Transactions on Cognitive Communications and Networking"

DOI: 10.1109/tccn.2017.2758372

Abstract: In this paper, the secrecy outage performance of an underlay cognitive decode-and-forward relay network over independent but not necessarily identical distributed Nakagami- ${m}$ fading channels is investigated, in which the secondary user transmitter communicates with… read more here.

Keywords: underlay cognitive; relay selection; secrecy outage; relay ... See more keywords
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Exploiting FD/HD Cooperative-NOMA in Underlay Cognitive Hybrid Satellite-Terrestrial Networks

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recommendations! Published in 2022 at "IEEE Transactions on Cognitive Communications and Networking"

DOI: 10.1109/tccn.2021.3089164

Abstract: This paper investigates the performance of an underlay cognitive hybrid satellite-terrestrial network comprising a primary satellite source with its multiple terrestrial primary receivers and a secondary transmitter with its pre-paired users that are deployed on… read more here.

Keywords: noma; satellite; underlay cognitive; satellite terrestrial ... See more keywords
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Improper Gaussian Signaling for Multiple-Access Channels in Underlay Cognitive Radio

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recommendations! Published in 2019 at "IEEE Transactions on Communications"

DOI: 10.1109/tcomm.2018.2880765

Abstract: This paper considers an unlicensed multiple-access channel (MAC) that coexists with a licensed point-to-point user, following the underlay cognitive radio paradigm. We assume that every transceiver except the secondary base station has one antenna and… read more here.

Keywords: multiple access; improper gaussian; underlay cognitive; cognitive radio ... See more keywords

Performance Analysis and Deep Learning Design of Underlay Cognitive NOMA-Based CDRT Networks With Imperfect SIC and Co-Channel Interference

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recommendations! Published in 2021 at "IEEE Transactions on Communications"

DOI: 10.1109/tcomm.2021.3110209

Abstract: In this paper, we investigate an underlay cognitive non-orthogonal multiple access (NOMA)-based coordinated direct and relay transmission network with imperfect successive interference cancellation, imperfect channel state information, and co-channel interference caused by a multi-antenna primary… read more here.

Keywords: underlay cognitive; analysis; channel; performance ... See more keywords
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On Mutual Interference Analysis in Hybrid Interweave-Underlay Cognitive Communications

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recommendations! Published in 2019 at "IEEE Transactions on Mobile Computing"

DOI: 10.1109/tmc.2018.2865340

Abstract: In this paper, we study the mutual interference in the context of a hybrid interweave-underlay cognitive communication where transmission constraints from both primary and secondary networks are considered. The transmission of a secondary user in… read more here.

Keywords: interweave underlay; hybrid interweave; underlay cognitive; interference ... See more keywords
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A PSD Maps Estimation Algorithm for Underlay Cognitive Radio Networks Based on the Convolutional Neural Network

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recommendations! Published in 2020 at "Mathematical Problems in Engineering"

DOI: 10.1155/2020/4024631

Abstract: In the underlay cognitive radio networks (CRNs), the power spectral density (PSD) maps play a foundational role in detecting the idle radio resources. However, it is hard to get a high-accurate PSD map estimation result… read more here.

Keywords: psd maps; estimation; radio; psd map ... See more keywords
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Outage performance of underlay cognitive radio networks over mix fading environment

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recommendations! Published in 2021 at "International Journal of Electrical and Computer Engineering"

DOI: 10.11591/ijece.v11i3.pp2019-2026

Abstract: In this paper, the underlay cognitive radio network over mix fading environment is presented and investigated. A cooperative cognitive system with a secondary source node S, a secondary destination node D, secondary relay node Relay,… read more here.

Keywords: fading environment; system; mix fading; performance ... See more keywords
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Analysis of relay selection schemes in underlay cognitive radio non-orthogonal multiple access networks

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recommendations! Published in 2022 at "International Journal of Distributed Sensor Networks"

DOI: 10.1177/15501477211066304

Abstract: This article investigates the impacts of relay selection schemes on cooperative underlay cognitive radio non-orthogonal multiple access networks, where the partial relay selection scheme, the max–min relay selection scheme and the two-stage relay selection scheme… read more here.

Keywords: relay selection; underlay cognitive; selection schemes; cognitive radio ... See more keywords