International Journal of Computer Applications
The Cognitive Radio (CR) is a most authentic solution for the spectrum scarcity as there is rapid growth in wireless communication and spectrum is very limited. The main and key function of cognitive radio is to sense the idle spectrum which can be used for by secondary users in opportunistic manner. A number of techniques are proposed by various researchers. Energy Detection (ED) is the most popular technique for spectrum sensing but its performance degrades at low SNR. Spectral Covariance sensing is another effective technique which provides better detection but computationally it is more complex.