Paper Title
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).