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## Annals of Computer Science and Information Systems

2015 | 5 | 55--66
Tytuł artykułu

### Application of Artificial Neural Network and Support Vector Regression in Cognitive Radio Networks for RF Power Prediction Using Compact Differential Evolution Algorithm

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Języki publikacji
EN
Abstrakty
EN
Cognitive radio (CR) technology has emerged as a promising solution to many wireless communication problems including spectrum scarcity and underutilization. To enhance the selection of channel with less noise among the white spaces (idle channels), the a priory knowledge of Radio Frequency (RF) power is very important. Computational Intelligence (CI) techniques cans be applied to these scenarios to predict the required RF power in the available channels to achieve optimum Quality of Service (QoS). In this paper, we developed a time domain based optimized Artificial Neural Network (ANN) and Support Vector Regression (SVR) models for the prediction of real world RF power within the GSM 900, Very High Frequency (VHF) and Ultra High Frequency (UHF) FM and TV bands. Sensitivity analysis was used to reduce the input vector of the prediction models. The inputs of the ANN and SVR consist of only time domain data and past RF power without using any RF power related parameters, thus forming a nonlinear time series prediction model. The application of the models produced was found to increase the robustness of CR applications, specifically where the CR had no prior knowledge of the RF power related parameters such as signal to noise ratio, bandwidth and bit error rate. Since CR are embedded communication devices with memory constrain limitation, the models used, implemented a novel and innovative initial weight optimization of the ANN's through the use of compact differential evolutionary (cDE) algorithm variants which are memory efficient. This was found to enhance the accuracy and generalization of the ANN model. Index Terms-Cognitive Radio; Primary User; Artificial Neural Network; Support Vector Machine; Compact Differential Evolution; RF Power; Prediction.(original abstract)
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EN
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Tom
Strony
55--66
Opis fizyczny
Twórcy
autor
• Centre for Computational Intelligence, School of Computer Science and Informatics, De Montfort University, England
autor
• Centre for Computational Intelligence, School of Computer Science and Informatics, De Montfort University, England
autor
• Centre for Computational Intelligence, School of Computer Science and Informatics, De Montfort University, England
autor
• Centre for Computational Intelligence, School of Computer Science and Informatics, De Montfort University, England
autor
• Centre for Computational Intelligence, School of Computer Science and Informatics, De Montfort University, England
Bibliografia
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