Investigating the impact of primary user velocity on spectrum sensing in cognitive radio networks

Abstract

This thesis presents an investigation on the impact of primary user velocity on spectrum sensing in cognitive radio networks. Two performance metrics are considered and derived that is; detection capability and sensing capacity. The movement of the primary user is modelled using Random way point and Random Walk mobility models. For spectrum sensing, the critical variable is the distance between the primary user and the secondary user. The exact closed-form expressions for the probability that a SU is inside the protection range of the PU and the Sensing capacity of the SU are derived to study performance of the system. Numerical results are provided to render the theoretical analysis valid and show the impact of the major system parameters on the CRNs . Lastly, conclusion and future recommendations are provided to assist in the succeding research prospects.