International Journal of Engineering Research and Development (IJERD)
With rapid growth of wireless devices, the scarcity of spectrum resources arises, due to the improper and inefficient usage of available spectrum band. This problem can be alleviated by cognitive radio. The major function of the cognitive radio relies on efficient sensing of available spectrum and Spectrum sensing techniques have been used to enhance the detection performance. Among these techniques, Energy detection is considered to be the implemented in practice because of less complexity. In this paper, the authors propose an Adaptive threshold scheme which improves the detection performance under low SNR region.