Sensing of channel to detect the presence of primary to provide the vacant band to secondary users we use the Energy Detection Technique Algorithm in Cognitive Radio. The simulations of a proper coding to detect or shows the all kind of requirements like Presence of primary and secondary and level of noise and level attenuation The behaviors of Energy Detection Scheme in Cognitive Radio is mainly depends upon three parameters like Probability of Detection, Likelihood of False discovery, Probability of Miss recognition is likewise enhancing by utilizing the created MATLAB codes. Vitality Detection Technique is best strategy for cognitive Radio for low SNR.