Spectrum sharing is a research area within the field of wireless communications that focuses on the efficient and fair allocation of radio frequency spectrum among different users and services. With the increasing demand for wireless connectivity and limited available spectrum, spectrum sharing has become a critical issue in maximizing spectrum utilization and enabling various wireless communication technologies to coexist and operate effectively. Research in spectrum sharing explores methods and techniques for dynamically allocating and sharing spectrum among different users, devices, and technologies, while ensuring interference management, efficient use of spectrum resources, and equitable access for all users. This includes spectrum sensing, cognitive radio techniques, dynamic spectrum access, and coexistence mechanisms to enable efficient spectrum sharing among different wireless systems. Spectrum sharing research plays a crucial role in enabling the development of advanced wireless communication systems, such as 5G and beyond, and in addressing the spectrum scarcity challenges in the wireless industry.