Performance analysis of non-coherent detection for spectrum sensing

A cognitive radio is a novel approach in wireless communications. As, the radio spectrum for transmission is very limited but the usage of spectrum is increasing day by day. So for Proper utilization of spectrum the new technology is used, which sense the vacant spectrum and used that space by secondary user. For sensing the spectrum the CR network used various detection techniques such as energy detection, cyclostationary feature detection, matched filtering, interference based detection and coherent detection and Non –coherent detection. In this paper Non – coherent detection technique is used, where the performance of spectrum sensing is study through the ROC curve. The ROC curve is used for detection of absent or present of primary users through the probability of detection.