Collaborative Spectrum Detection in Cognitive Radio Networks
Authors: Joseph Wumboranaan Nanjo, Kusi-Ankrah Bonsu, Solomon Nsor-Anabiah
DOI: 10.37326/ajsev8.12/2062
Page No: 11-26
Abstract
The explosive growth in wireless communications has led to a scarcity of available spectrum resources. Cognitive Radio (CR) technology offers a solution by enabling dynamic spectrum access, allowing secondary users to opportunistically utilize underutilized spectrum bands without causing interference to primary users. Cooperative spectrum sensing, is a key component of CR, which leverages collaboration among multiple CRs to improve the accuracy and reliability of spectrum sensing. This paper explores the principles, techniques, challenges and solutions of co-operative spectrum sensing in cognitive radios. Irrespective of the challenges associated with the collaborative spectrum sensing approach, it is the key solution to hidden node problems and detection probability in cognitive radio sensing can be significantly improved in a heavily shadowed environment. The system model deployed in this paper used the OR and AND rules in collaboration with the fusion center for fusion center decisions be taken with respect to PU spectrum detection in an environment of multiple SUs, depending on the majority voting rule. The outcomes of various simulations helped in the identification of energy detection, detection and false alarm probabilities, cognitive radio decisions and fusion center rules as well as fusion center decisions based on different fusion rules are graphically represented in this paper.
