Detec??o Cooperativa de Espectro para R?dio Cognitivo Detec??o Cooperativa de Espectro para R?dio Cognitivo Interweave com Aumento da Rela??o Sinal/Ru?do usando DWT
Language: Portuguese
Published by Edi??es Nosso Conhecimento, 2023
- Softcover
- New
Condition: New
£ 65.48
Quantity: 2 available
Add to basketItem description from seller
A subutiliza??o do espectro, juntamente com a crescente quest?o da escassez de espectro, promoveu uma reavalia??o da forma como o espectro de radiofrequ?ncias ? utilizado. A tecnologia de r?dio cognitiva surge como uma solu??o que melhora a utiliza??o do espectro com a utiliza??o sistem?tica do escasso recurso atrav?s do acesso oportunista ao espectro. Entre muitos algoritmos de detec??o de espectro dispon?veis, o Detector de Energia (ED) ? prefer?vel, uma vez que n?o necessita da informa??o pr?via sobre os sinais do utilizador prim?rio e est? a ter uma baixa complexidade computacional. No entanto, o desempenho do ED ? directamente proporcional ? rela??o sinal/ru?do (SNR), o que leva a um mau desempenho no regime de SNR baixo. A fim de aliviar o problema de detec??o no regime de SNR baixo, a Transformada Discreta de Ondas (DWT) baseada na denoising do sinal do utilizador prim?rio ? aplicada na extremidade frontal do ED. O efeito da denoising antes da DE ? analisado atrav?s do emprego de seis ondula??es-m?e diferentes como Haar, Daubechies, BiorSplines, ReverseBior, Coiflets e Fejer-Korovkin e, a m?trica de desempenho da DE ? analisada utilizando uma ?nica fase de ED baseada em wavelet. Os resultados da simula??o mostraram que a abordagem de ondula??o-m?e Reverse Bior melhora todas as matrizes de desempenho. Gewicht in Gramm: 167.…
Seller Inventory # IB-20028746
- Title
- Detec??o Cooperativa de Espectro para R?dio Cognitivo Detec??o Cooperativa de Espectro para R?dio Cognitivo Interweave com Aumento da Rela??o Sinal/Ru?do usando DWT
- Author
- Ram Sewak Singh, Yonas Taye Bekele, Satyasis Mishra
- Publisher
- Edi??es Nosso Conhecimento
- Publication year
- 2023
- Condition
- Neu
- Binding
- Softcover/Taschenbuch
- Language
- Portuguese
- ISBN 10
- 6205602504
- ISBN 13
- 9786205602508
- Item weight
- 167 grams
"Synopsis" may belong to another edition of this title.
Shipping rates from Germany to U.S.A.
| Item | 10 to 12 business days | 8 to 10 business days |
|---|---|---|
| First item | £ 41.67 | £ 62.64 |
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