Abstract: In the current scenario, the conception of the Cognitive Radio (CR) and the cognitive radio networks are new areas of research, development, evolution and elaboration. The job of sensing the spectrum proves a very cumbersome process. In current times, in order to sense the spectrum which exists, we do have a number of techniques available. Some of these spectrum sensing techniques and methods are energy detection method, cyclo-stationary technique, feature detection technique, wavelet transform method etc. In this paper, the main area of concern will be the spectrum sensing using energy detection method with the enhancement of probability of detection by the adaptive nature of the threshold and the number of samples.

Keywords: Cognitive Radio, Probability of Detection, Energy Detection