Advancement in wireless technologies and networks

Abstract

This chapter discusses the emerging trends and research direction for advanced wireless technologies. This chapter also presents the necessity of spectral efficiency for next-generation wireless technologies by discussing different spectrum sensing techniques. Moreover, a recent survey reveals that almost 70% of the available spectrum is not utilized efficiently. Therefore, more research is needed to determine whether the spectrum is being used by primary user or not for efficient utilization of spectrum. This chapter analyses the sensing by identifying a few situations, and then these behaviours have been reported to the operator for further action. Generally, spectrum sensing techniques are classified into three such as transmitter detection, receiver detection and interference temperature detection. This chapter mainly focuses on the performance analysis of transmitter-based detection techniques, such as matched detection, energy detection and cyclostationary detection. In addition, the receiver operating characteristics (ROC) for various number of sensing samples are presented in this chapter.