Spectrum sharing framework in full duplex mode with minimum interference in 5G cellular network

Spectral sharing with in-band full-duplex (FD) primary users (PUs) in cognitive radio (CR) systems is a difficult and challenging task. The ability of the secondary user (SU) to access the spectrum could be substantially impeded by the primary network's self-interference. We propose a novel dynamic spectrum sharing (DSS) scheme while satisfying In-band FD technology as the mitigation of strong self-interference in the 5G cellular networks platform. In particular, the in-band FD-PU pair implements the normal proper Gaussian signal, although it is intended for SU downlink transmission with an inappropriate Gaussian signal. First, we derive the closed-form expression and the upper bounds of the default probabilities for SU and PU, respectively. While discussing major concerns in the 5G cellular networks system, the second stage optimization is carried out utilizing the optimal spectrum sharing approach, and a self-interference game methodology based on the proportional enthalpy-based sigmoid solution is applied. This method is primarily employed to reduce computational complexity and overheads. In terms of SINR, Spectral efficiency, and other metrics, the computational studies show that the provided method outperforms existing methods. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2024.