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The accurate spectrum sensing is a predominant aspect of any competent CR system. Efficient spectrum sensing enables a CR terminal to detect the spectrum holes (underutilized spectral bands) by providing high spectral resolution, thereby accrediting opportunistic transmission in the licensed band to the CR. In order to facilitate a good spectrum management and its efficient use a hybrid method for the detection of the spectrum with the purpose of detecting the presence of bands of unoccupied frequencies is proposed. The method used are traditional energy detection and matched filter with changing number of secondary users using each technique and finally a centralized cooperative spectrum sensing network which employs hard combination at the fusion centre. Keywordscognitive radio; spectrum sensing; energy detection, ROC; Matched Filter

Heterogeneous Spectrum Sensing in Cognitive Radio Network using Traditional Energy Detection and Matched Filter