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A SURVEY ON COGNITIVE RADIO, ITS NEED AND PARADIGMS
2017
International Journal of Advanced Research in Computer Science
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Cognitive Radio (CR) technology is an ultimate approach to encounter spectrum scarceness issues arising in wireless communications. ...
A network plays an important role in our day to day life. Wireless technologies, for their transportability, flexibility and maintenance are getting widely popular in networks in today's era. ...
LITERATURE SURVEY ON COGNITIVE RADIO In [8] , we studied the cross-layer pattern for crowding, disagreement and power control in multi-hop type cognitive radio ad-hoc network. ...
doi:10.26483/ijarcs.v8i9.5082
fatcat:mik4rvju5vhojmdcdlww7fllui
Intelligent Wireless Communications Enabled by Cognitive Radio and Machine Learning
[article]
2018
arXiv
pre-print
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In this paper, we discuss the development of the cognitive radio technology and machine learning techniques and emphasize their roles in improving spectrum and energy utility of wireless communication ...
We describe the state-of-the-art of relevant techniques, covering spectrum sensing and access approaches and powerful machine learning algorithms that enable spectrum- and energy-efficient communications ...
A distributed multi-agent multi-band reinforcement learning framework is developed in [153] for spectrum sensing in ad hoc cognitive radio networks. ...
arXiv:1710.11240v4
fatcat:elt77cgcxvappbxvspp7evb74u
Introductory Chapter: Primary and Secondary Users in Cognitive Radio-Based Wireless Communication Systems
[chapter]
2018
Cognitive Radio in 4G/5G Wireless Communication Systems
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In recent years, the lack of frequency spectrum and the necessity of frequency reuse at different times and places and reduction of the consumed power are of great importance. ...
From the beginning, one of the main problems in wireless communications is the scarcity of radio resources (frequency, time, and power). ...
Briefly, we can see the main solutions for spectrum allocation: • Array processing and signal improvement • Multi-input multi-output (MIMO) technology • Non-orthogonal multiple access (NOMA) • Waveforms ...
doi:10.5772/intechopen.82033
fatcat:cwflydi5qrbobk2lmpyxzqvdfe
Survey of Related Technologies for Improved Spectrum Efficiency
2012
IOSR Journal of Engineering
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The development of technologies like 4 th generation (4G) technology, Ultra Wide Band (UWB) techniques, Software-defined Radios (SDRs), and Cognitive Radios (CRs) help to improve the overall utilization ...
Cognitive Radios in particular have the potentials to substantially improve spectrum efficiency by opportunistically using spectrum. ...
In the underlay approach, the SUs access the network by spreading their signals over a wide frequency band. The underlay approach imposes severe constraints on the transmission power of SUs. ...
doi:10.9790/3021-021122533
fatcat:hpq5bydsmbg3rjst476vab2vye
Game Theory based Hybrid Cognitive Radio Transmission
2016
Indian Journal of Science and Technology
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Applications/Improvements: The overhead of generation two different waveform in hybrid cognitive radio using Fast Fourier Transform (FFT) is reduced by sharing the common functionality between them under ...
Overlay based Cognitive radio can utilize only the primary user spectrum opportunistically for transmission. ...
The spectrum is severely under-utilised in some bands and extremely congested in consumer radio communications bands 2 . ...
doi:10.17485/ijst/2016/v9i20/91145
fatcat:swh3mdd6lzhcdb5wiavp3nvwly
Deep Reinforcement Learning for Distributed Uncoordinated Cognitive Radios Resource Allocation
[article]
2020
arXiv
pre-print
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This paper presents a novel deep reinforcement learning-based resource allocation technique for the multi-agent environment presented by a cognitive radio network that coexists through underlay dynamic ...
spectrum access (DSA) with a primary network. ...
EXPERIMENTAL RESULTS AND DISCUSSION We evaluated the proposed multi-agent DQL technique through 100 Monte Carlo simulations runs where a PN shares through underlay DSA a 180 kHz radio spectrum band with ...
arXiv:1911.03366v2
fatcat:dy4ksohhsne3xjwszkppe3bdmy
Power Minimization in Dual-Hop Underlay Cooperative Cognitive Radio Relay Networks for Optimal Resource Allocation
2022
FUOYE Journal of Engineering and Technology
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In this paper, we investigate a multi-user one-way dual-hop multi-relay cognitive radio underlay spectrum sharing network. .The joint optimal resource allocation of the bandwidth and power allocation in ...
underlay Cooperative Cognitive Radio Relay Network (CCRRN) was studied and a convex optimization analytical framework is presented. ...
The underlay spectrum sharing model enables secondary users (SUs) to access licensed radio spectrum bands of primary users (PUs) without carrying out spectrum sensing. ...
doi:10.46792/fuoyejet.v7i1.746
fatcat:xajjkyflbzfgro2kq77isntme4
Multicarrier Spread Spectrum Modulation Schemes and Efficient FFT Algorithms for Cognitive Radio Systems
2014
Electronics
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Since the cognitive radio is an adaptive system, the FFT operator must also be adaptive for various input/output values, in order to save energy and time taken for execution. ...
Spread spectrum (SS) and multicarrier modulation (MCM) techniques are recognized as potential candidates for the design of underlay and interweave cognitive radio (CR) systems, respectively. ...
In [40] , the authors investigated the joint power and rate allocation strategies for CDMA based underlay cognitive radio networks with heterogeneous traffic. ...
doi:10.3390/electronics3030419
fatcat:kfhyr3mn3ngrzgpkyxrwr7wxbe
Cross Layer Routing in Cognitive Radio Networks using Deep Reinforcement Learning
2019
2019 IEEE Wireless Communications and Networking Conference (WCNC)
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Cognitive Radio Networks (CRNs) provide an efficient solution to this problem. In CRNs, multiple secondary users share the spectrum band that is allocated to a primary network. ...
This spectrum sharing of the primary spectrum band is achieved in this work by using an underlay scheme. ...
Cognitive Radio Networks (CRNs) can provide an efficient solution to this spectrum scarcity problem by utilizing unused spectrum band and enabling dynamic sharing of underutilized portions of the spectrum ...
doi:10.1109/wcnc.2019.8885918
dblp:conf/wcnc/ChitnavisK19
fatcat:ywvabkpk5rfilphhtl7ocsr7t4
20 Years of Evolution from Cognitive to Intelligent Communications
[article]
2019
arXiv
pre-print
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Particularly, this article starts from a comprehensive review of typical spectrum sensing and sharing, followed by the recent achievements on the AI-enabled intelligent radio. ...
After witnessing the glorious developments of CR in the past 20 years, we try to provide readers a clear picture on how intelligent radio could be further developed to smartly utilize the limited spectrum ...
carrier aggregation for spectrum sharing between a multiple-input multiple-output (MIMO) radar and a Long Term Evolution Advanced (LTE-A) cellular system has been studied in [74] . 2) Underlay: Secondary ...
arXiv:1909.11562v1
fatcat:au2oewpfm5eb3ccnnpvrcbypim
Interference Alignment in Multi-Hop Cognitive Radio Networks under Interference Leakage
2018
Applied Sciences
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In this work, we examine the interference alignment (IA) performance of a multi-input multi-output (MIMO) multi-hop cognitive radio (CR) network in the presence of multiple primary users. ...
In the proposed architecture, it is assumed that linear IA is adopted at the secondary network to alleviate the interference between primary and secondary networks. ...
Hussein et al. in [26] and the authors in [27] considered a multi-input multi-output (MIMO) multi-hop CR network and investigated its detailed performance. ...
doi:10.3390/app8122486
fatcat:hazwontb5rcavfqgipirv4wfsi
Guest Editorial Spectrum Sharing and Aggregation for Future Wireless Networks, Part I
2016
IEEE Journal on Selected Areas in Communications
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They provided both the Reviewers and Editors with a fascinating snapshot of the range of ongoing research in the area of spectrum sharing and aggregation. ...
Muriel Medard, JSAC Editor-in-Chief, to the Executive Editor Laurel Greenidge and to the Senior Editor Prof. Max Henrique Machado Costa for the encouragement they have provided. ...
allocation in multi-hop wireless networks. ...
doi:10.1109/jsac.2016.2606819
fatcat:ihhh3dafh5bm7nmcla4puptblm
Cognitive Radio: UWB Integration and Related Antenna Design
[chapter]
2010
New Trends in Technologies: Control, Management, Computational Intelligence and Network Systems
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The current approach for spectrum allocation is based on assigning a specific band to a particular service. This is illustrated by the FCC frequency allocation chart shown in Fig. 1 . The ...
Added to the fact that the demand for additional spectrum is growing fast, even faster than costly technologies like Multiple Input Multiple Output (MIMO) and Space Division Multiple Access (SDMA) can ...
Cognitive Radio (CR) will revolutionize the way spectrum is allocated. ...
doi:10.5772/10405
fatcat:io6szc5oundkxngaoddzftu7aq
Design of a Mathematical Model for Spectrum Utilisation in Cognitive Radio
2018
International Journal of Computer Applications
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This paper observed that the two approaches of underlay and overlay of spectrum utilisation of CRs are not maximising the potentials of CRs. ...
This prompts the development of cognitive radios (CRs) to improve the overall utilisation of the limited spectrum by opportunistically using licensed spectrum. ...
Cognitive radio networks intend to address the inefficient usage of spectrum in static allocation through dynamic sharing of available spectrum between licensed users also called primary users and unlicensed ...
doi:10.5120/ijca2018916436
fatcat:tefbhz425ze6jhyk6hlgsnmsdi
Cognitive Non-Orthogonal Multiple Access with Cooperative Relaying: A New Wireless Frontier for 5G Spectrum Sharing
[article]
2018
arXiv
pre-print
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Two emerging technologies towards 5G wireless networks, namely non-orthogonal multiple access (NOMA) and cognitive radio (CR), will provide more efficient utilization of wireless spectrum in the future ...
In this article, we investigate the integration of NOMA with CR into a holistic system, namely cognitive NOMA network, for more intelligent spectrum sharing. ...
Thus, cognitive NOMA expects to provide more intelligent spectrum sharing, by combining the CR spectrum sharing and NOMA spectrum sharing in a constructive way to further improve the spectrum utilization ...
arXiv:1801.04022v1
fatcat:i35md76srnhalm6e5qouuq656i
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