Cooperative Spectrum Sensing using Mobile Full-Duplex Cognitive Radio and Non-time-slotted Primary user Activity

Abstract

An In-band-full-duplex (FD) technology-empowered cognitive radio (CR) system with a non-time-slotted primary user activity is presented in this work. FD here means that the transmission and reception can be performed at the same frequency and time simultaneously. Moreover, to incorporate the mobility of the CR, the random waypoint model is used. The non-time-slotted primary user activity implies that the primary and the secondary network are not synchronized. Non-time-slotted means that the primary user can be active or inactive during the CR's sensing/transmission duration. In the conventional time-slotted model, the primary user changes its state during the initial time and not later in the CR sensing window. The performance of the considered FD-CR network is observed in a Rayleigh fading environment. Specifically, the expression for miss-detection probability is derived. It is observed that the CR mobility and non-time-slotted primary activity would very much affect the miss-detection probability. Also, the proposed system with an efficient self-interference suppression mechanism outperforms the conventional half-duplex CRN.