Zobrazeno 1 - 10
of 436
pro vyhledávání: '"spectrum occupancy"'
Autor:
Łukasz Kułacz
Publikováno v:
Journal of Telecommunications and Information Technology, Vol 3, Iss 3 (2023)
Utilization of reconfigurable intelligent surfaces is a topic that is very interesting in the context of complex radio environments, especially those used in dense urban areas. By relying on simple solutions to control the angle of reflection of the
Externí odkaz:
https://doaj.org/article/43b2a846fa6c44049c769014ccad89b0
Publikováno v:
Радіоелектронні і комп'ютерні системи, Vol 0, Iss 4, Pp 108-116 (2022)
The subject of this article is the process of detection and estimation frequency boundaries of spectrum holes under conditions of high spectrum occupancy when using receivers with narrow instantaneous bandwidths. The work increases the probability of
Externí odkaz:
https://doaj.org/article/a790a19963264549a0a7d73260e0c0a3
Publikováno v:
IEEE Access, Vol 10, Pp 82025-82035 (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’ d
Externí odkaz:
https://doaj.org/article/066bfd8cc005412fab1aea32f42d2b04
Autor:
Frederick Ojiemhende Ehiagwina, Nazmat Toyin Surajudeen-Bakinde, Akindele Segun Afolabi, Ayinde Mohammed Usman
Publikováno v:
Telematics and Informatics Reports, Vol 7, Iss , Pp 100014- (2022)
A realistic and credible model capable of forecasting spectrum occupancy patterns of primary users (PU) needs to be developed to improve the functioning of cognitive radio networks (CRNs) in terms of the spectrum decision process. This will result in
Externí odkaz:
https://doaj.org/article/41d7186f8c4c4b5194c48d241d606c7b
Autor:
Łukasz Kułacz, Adrian Kliks
Publikováno v:
Sensors, Vol 23, Iss 14, p 6436 (2023)
Dynamic access to the spectrum is essential for radiocommunication and its limited spectrum resources. The key element of dynamic spectrum access systems is most often effective spectrum occupancy detection. In many cases, machine learning algorithms
Externí odkaz:
https://doaj.org/article/f30af19bc52f403dac815c9038220dd6
Autor:
S. Tidjani, Z. Hammoudi
Publikováno v:
Iranian Journal of Electrical and Electronic Engineering, Vol 19, Iss 2, Pp 2417-2417 (2023)
This paper describes a spectrum observatory (SO) performed outdoor in two locations in Algeria and highlights the importance of the SO in the improvement of spectrum management in cognitive radio networks. These measurements were achieved in conjunct
Externí odkaz:
https://doaj.org/article/fb35545663b1426389d93a35d264218e
Bilişsel Radyo Uygulamaları için Uzun Süreli Spektrum Doluluk Ölçümleri: Samsun Şehir Merkezi Örneği
Publikováno v:
Düzce Üniversitesi Bilim ve Teknoloji Dergisi, Vol 8, Iss 3, Pp 1840-1851 (2020)
Bu çalışmada Samsun şehir merkezinde 470 MHz - 790 MHz frekans aralığında, spektrumun en yoğun olduğu bölgede, 7 farklı günde ve 14 farklı zamanda spektrum doluluk ölçümleri yapılmıştır. Ölçümlerde RTL2832U-R820T spektrum anali
Externí odkaz:
https://doaj.org/article/6b0c8ea1e770418a9dccc9eb345b6271
Autor:
Ubom, E. A., Ukommi, U. S.
Publikováno v:
Nigerian Journal of Technology; Vol. 41 No. 6 (2022); 1008-1016
Wireless services are at high demand all over the world, leading to increased bandwidth requirement and exhausted spectrum. In response, efforts are on-going to find ways to allow secondary access to spectrum without causing unacceptable interference
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Publikováno v:
EURASIP Journal on Wireless Communications and Networking, Vol 2018, Iss 1, Pp 1-17 (2018)
Abstract 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. Dynamic spectrum access systems allow secondary users to utili
Externí odkaz:
https://doaj.org/article/e630d3ab40334018afe9bd3bfa3fa3e2