Evaluation of energy detection based spectrum sensing in cognitive radio networks

Abstract

Spectrum sensing is the process of identifying the free (unused) spectrum of the main user without making any interference or upsetting the rights of licence users. This procedure takes place without creating any interference and without disturbing the rights of licence users. It means identifying gaps in the spectrum that are not being utilised. The most effective method for locating gaps in spectrum use is to search for key users. The development of an energy detector and a detector based on cyclostationarity for an OFDM-based cognitive radio system, as well as the implementation of these detectors and an evaluation of their performance, are the primary focuses of this project. The idea behind cognitive radio is to make the most of the underutilized spectral resources by utilising unused spectrums in an opportunistic way. This is accomplished via the notion of cognitive radio. Main users of the spectrum are typically incumbent licensees, while secondary users of the spectrum are users who wish to make opportunistic use of the spectrum when main users are not actively using it. This is an example of a cognitive radio system. The cognitive radios are required to do spectrum sensing to determine whether or not the spectrum is accessible. Both the energy detector and the cyclostationary detector are derived, then we implement them, and then we assess them. Plotting the Receiver Operating Characteristics (ROC) in clean and noisy situations allows us to assess the performance of the detectors.