earticle

영어

Spectrum sensing is one of the key functions of cognitive radio networks (CRN), which senses licensed band for CR users. This paper introduces a two phase detector, carries a weighted-energy detector (W-ED) and a correlated-generalized likelihood ratio test (C-GLRT). In first phase, we identify the energy and then if required, the C-GLRT makes the final decision in second phase. Performance of the proposed two phase detector is compared with the existing energy detector (ED), generalized likelihood ratio test (GLRT), and adaptive spectrum Sensing (ASS) detectors.