Results 11 to 20 of about 1,034,587 (282)
Design Guidelines for Database-Driven Internet of Things-Enabled Dynamic Spectrum Access [PDF]
Sensors, 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
The SS-SCR Scheme for Dynamic Spectrum Access [PDF]
Journal of Computer Networks and Communications, 2012 We integrate the two models of Cognitive Radio (CR), namely, the conventional Sense-and-Scavenge (SS) Model and Symbiotic Cooperative Relaying (SCR). The resultant scheme, called SS-SCR, improves the efficiency of spectrum usage and reliability of the ...
Vinay Thumar +3 more
doaj +4 more sources
Preference-based spectrum pricing in dynamic spectrum access networks [PDF]
IEEE Transactions on Services Computing, 2016 With market-driven secondary spectrum trading, licensed users can receive benefits in terms of monetary rewards or various transmission services, thus setting a fair pricing structure by suitably defining spectrum quality characteristics and accurately ...
Hua, Jingyu +3 more
core +3 more sources
Enhanced Compressive Wideband Frequency Spectrum Sensing for Dynamic Spectrum Access [PDF]
EURASIP Journal on Advances in Signal Processing, 2012 Wideband spectrum sensing detects the unused spectrum holes for dynamic spectrum access (DSA). Too high sampling rate is the main problem. Compressive sensing (CS) can reconstruct sparse signal with much fewer randomized samples than Nyquist sampling ...
Liu, Yipeng, Wan, Qun
core +4 more sources
Federated Dynamic Spectrum Access
, 2021 Due to the growing volume of data traffic produced by the surge of Internet of Things (IoT) devices, the demand for radio spectrum resources is approaching their limitation defined by Federal Communications Commission (FCC). To this end, Dynamic Spectrum Access (DSA) is considered as a promising technology to handle this spectrum scarcity.
Song, Yifei +4 more
openaire +2 more sources
Towards Collaborative and Dynamic Spectrum Sharing via Interpretation of Spectrum Access Policies
Applied 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
Sensors, 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
COGNITIVE RADIOS FOR DYNAMIC SPECTRUM ACCESS - Polyphase Multipath Radio Circuits for Dynamic Spectrum Access [PDF]
IEEE Communications Magazine, 2007 ABSTRACT Dynamic access of unused spectrum via a cognitive radio asks for flexible radio circuits that can work at an arbitrary radio frequency. This article reviews techniques to realize radios without resorting to frequency selective dedicated filters.
Klumperink, Eric A.M. +4 more
openaire +1 more source
Enforcing dynamic spectrum access with spectrum permits [PDF]
Proceedings of the thirteenth ACM international symposium on Mobile Ad Hoc Networking and Computing, 2012 Given the flexibility of cognitive radio devices, a user can easily transmit on radio frequencies outside of her allocated range, creating harmful interference to legitimate transmissions. Therefore, how to effectively enforce allocated spectrum is a key challenge when deploying dynamic spectrum access in practice.
Zengbin Zhang +4 more
openaire +1 more source
Coordinated Dynamic Spectrum Sharing for 5G and Beyond Cellular Networks
IEEE 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