Spectrum Sensing Techniques : Research , Challenge and Limitations

w w w . i j e c t . o r g 240 InternatIonal Journal of electronIcs & communIcatIon technology Abstract Spectrum sensing has reborn as a very active research area over recent years. As it is one of the most important task performed by cognitive radio and the performance of the other functions of cognitive radio is based on the spectrum sensing. So it is very necessary for cognitive radio to perform this task very efficiently. This paper presents an overview to the spectrum sensing techniques on the basis of research, limitations and challenges related to its different aspects. Spectrum sensing could be an important enabling technology for future opportunistic spectrum sharing scenarios. Various spectrum sensing methods with their challenging issues and limitations are discussed in detail. The findings are summarized in a concluding section.