The Research of Spectrum Sensing Based on SU Classification in Cognitive LTE-A Network

In cognitive LTE-A networks, the enthusiasm of Secondary Users' (SUs) participation in spectrum sensing is low and the untrusted data is sent from SU to the Fusion Center (FC) due to the poor channel condition. Considering these problems, a cooperative spectrum sensing algorithm based on SU classification is proposed in this paper. The SUs are divided into Ordinary Secondary Users (OSUs) and Relay Secondary Users (RSUs). An incentive mechanism is introduced to encourage the SUs to participate in the spectrum sensing to solve the problem of the lower initiative of SU, and the problem of channel condition difference can be solved by means of relay in this article. The simulation results that the sensitivity of the proposed method is better than the non-classification method, and the SUs' enthusiasm is improved.