Performance Enhancement for Cognitive Radio

摘要

Cognitive Radio (CR) is an emerging technology which provides a way to overcome the problems associated with the limited bandwidth. CR promises to fulfill the usage of limited spectrum for the innovative exposure for the mankind and also for the development in the field of research. It uses the unlicensed band when the Primary User (PU) is not actively using it for its own purpose. This intelligent technology makes use of the unlicensed band and also make sure that it will not interference the primary user whenever PU demands for its own licensed band. Spectrum sensing is the one of the most important function of CR. The main aim of this paper is to get the knowledge about the techniques of spectrum sensing and also summarize the pros and cons of each technique in details. The simulations are done to show the relationship between the different parameters in the energy detection method. The improvement has done by applying different modulation technique and also by increasing the SNR value up to desire level.