Comparative Study of Various Spectrum Sensing Technique
Nowadays wireless applications has become the most popular applications . Growing appeal on wireless
applications has put a lot of constraints on available radio spectrum which is limited. In fixed spectrum assignments many
unused frequencies are not properly used so cognitive radio helps us to use these unused frequency bands. This improves
utilization of electromagnetic spectrum by using cognitive radio. Cognitive radio includes four functional blocks that are
spectrum sensing, spectrum management, spectrum administration and spectrum mobility. Among all functions spectrum
sensing is believed as most crucial task for cognitive radio networks. In this paper we are going to discuss and compare
spectrum sensing technique in detail.
Index Terms— Cognitive Radio (CR), Primary User (PU), Secondary User (SU).