Title: Assessment of spectrum sensing using support vector machine combined with principal component analysis
Authors: Manash Mahanta; Attaphongse Taparugssanagorn; Bipun Man Pati
Addresses: ICT Department, School of Engineering and Technology, Asian Institute of Technology, P.O. Box 4, 58 Moo 9, Km. 42, Paholyothin Highway, Klong Luang, Pathum Thani 12120, Thailand ' ICT Department, School of Engineering and Technology, Asian Institute of Technology, P.O. Box 4, 58 Moo 9, Km. 42, Paholyothin Highway, Klong Luang, Pathum Thani 12120, Thailand ' Faculty of Pharmaceutical Sciences, Chulalongkorn University, 254 Phayathai Road, Wang Mai Subdistrict, Pathum Wan District, Bangkok 10330, Thailand
Abstract: Cognitive radio (CR) is an up-and-coming technology to rectify the problem of under-utilisation of the allocated spectrum and meet the increasing demand for free spectrum. Spectrum sensing empowers the CR to adjust to its surroundings by locating free spectrum. Although spectrum sensing using a support vector machine (SVM) is already found in literature, an SVM combined with principal component analysis (PCA) and varying the kernel scale is yet to be investigated. In this paper, we perform spectrum sensing using an SVM and evaluate the performances of various kernel functions used in the SVM as well as how the performances of the learning algorithm change as we apply PCA and vary the kernel scales. We then compare the training time of the SVM kernels. Finally, we calculate the contributions of power, variance, skewness, and kurtosis of the received signal towards the decision-making process of the learning algorithm.
Keywords: spectrum scarcity; cognitive radio; spectrum sensing; principal component analysis; PCA; support vector machine; SVM; machine learning; kernel scale value; feature importance; large margin classifier; internet of things; IoT; orthogonal frequency division multiplexing; OFDM.
International Journal of Sensor Networks, 2022 Vol.39 No.4, pp.256 - 278
Received: 30 Oct 2021
Accepted: 06 Jan 2022
Published online: 30 Aug 2022 *