Results 1 to 10 of about 16,885,849 (273)

Design Guidelines for Database-Driven Internet of Things-Enabled Dynamic Spectrum Access [PDF]

open access: yesSensors, 2021
The radio-frequency spectrum shortage, which is primarily caused by the fixed allocation policy, is one of the main bottlenecks to the deployment of existing wireless communication networks, and to the development of new ones. The dynamic spectrum access
Dayan A. Guimarães   +3 more
doaj   +2 more sources

Towards Collaborative and Dynamic Spectrum Sharing via Interpretation of Spectrum Access Policies

open access: yesApplied Sciences, 2021
This paper describes some of the challenges that need to be addressed in order to develop collaborative spectrum-sharing systems. The importance of these challenges stems from the assumption that rules for spectrum sharing can change after the deployment
Jakub Moskal   +4 more
doaj   +1 more source

Modified Gini Index Detector for Cooperative Spectrum Sensing over Line-of-Sight Channels

open access: yesSensors, 2023
Recently, the Gini index detector (GID) has been proposed as an alternative for data-fusion cooperative spectrum sensing, being mostly suitable for channels with line-of-sight or dominant multi-path components.
Dayan Adionel Guimarães
doaj   +1 more source

Estimation of Distribution of Primary Channel Periods Based on Imperfect Spectrum Sensing in Cognitive Radio

open access: yesIEEE Access, 2022
Spectrum occupancy modeling plays an important role in improving the performance of Cognitive Radio (CR) systems, because most of the methods to improve Dynamic Spectrum Access (DSA) performance need to make assumptions about the channel periods’ ...
Weiqin Li, Guoliang Shentu, Xiang Gao
doaj   +1 more source

Coordinated Dynamic Spectrum Sharing for 5G and Beyond Cellular Networks

open access: yesIEEE Access, 2019
Current trends in spectrum regulation show that more and more unlicensed and shared spectrum bands are poised to be opened up for mobile communication. However, the question remains how to best utilize this spectrum and build efficient networks, and if ...
Jeongho Jeon   +4 more
doaj   +1 more source

Misbehavior Scenarios in Cognitive Radio Networks

open access: yesFuture Internet, 2010
Recent advances in the fields of Cognitive Radio and the proliferation of open spectrum access promise that spectrum-agile wireless communication will be widespread in the near future, and will bring significant flexibility and potential utility ...
Hermann de Meer   +7 more
doaj   +1 more source

Statistical spectrum occupancy prediction for dynamic spectrum access: a classification

open access: yesEURASIP Journal on Wireless Communications and Networking, 2018
ᅟ Spectrum scarcity due to inefficient utilisation has ignited a plethora of dynamic spectrum access solutions to accommodate the expanding demand for future wireless networks.
Hamid Eltom   +4 more
doaj   +1 more source

Privacy-Preserving Crowd-Sensing for Dynamic Spectrum Access With Malicious Workers

open access: yesIEEE Access, 2021
The rapid growth of IoT wireless devices has caused severe spectrum shortage. The Dynamic Spectrum Access (DSA) paradigm is extremely well-suited to alleviate such spectrum shortage.
Erald Troja   +3 more
doaj   +1 more source

A Contract-Based Spectrum Trading Scheme for Cognitive Radio Networks Enabling Hybrid Access

open access: yesIEEE Access, 2015
The latest trends in spectrum trading allow secondary users (SUs) to employ hybrid access models and exploit bandwidth employing either opportunistic spectrum access or exclusive spectrum access of vacant frequency bands (FBs) leased for exclusive usage.
Angeliki V. Kordali, Panayotis G. Cottis
doaj   +1 more source

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