Machine Learning Techniques in Spectrum Sensing
Keywords:
Gaussian Mixture Model, cooperative spectrum sensing, cognitive radio, Support Vector Machine.Abstract
The spectrum shortage brought on by the development of new technologies can be minimized through the use of cognitive radio (CR) technology. Cognitive networks struggle with the hidden primary user problem because the secondary user may classify the spectrum occupancy incorrectly. As a result, machine learning-based cooperative spectrum sensing (CSS) was used to solve this challenge. Gaussian Mixture Model (GMM) and Support Vector Machine (SVM) are two methods of machine learning approaches, where GMM is an unsupervised learning methodology and SVM is a supervised learning technique. The two phases of the aforementioned techniques—classification and training—determine the classes for channels that are available and unavailable. With a mixture of Gaussian density distributions, training features are determined using the Gaussian Mixture Model. A subset of training vectors for the SVM is used to create the decision surface. By increasing the space between the training and separation vectors, this is accomplished.
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