Cyclostationarity based spectrum sensing method with uncertain arrivals of primary users

Spectrum Sensing is the key technology of Cognitive Radio (CR). This paper proposes a new cyclostationarity based spectrum sensing method with uncertain arrivals of primary users. The method first divides the spectrum sensing period of a SU into several intervals according to the reciprocal of cyclic frequency, then computes the test statistic from these intervals based on Likelihood Ratio Test (LRT), calculates the threshold based on Newman-Pearson (N-P) criteria and finally makes the decision. Simulation results demonstrates the validity and the superiority of the proposed method when the PU comes uncertainly, compared with the conventional cyclostationarity based spectrum sensing method.