Research On Cognitive Radio Spectrum Sensing Based On Purely Discontinuous Markov Process

In order to solve the problem of low frequency spectrum utilization, cognitive radio has become a new means of science and technology.A spectrum sensing method based on the purely discontinuous Markov process was proposed in this paper. The channel states can be divided into idle and busy state in any moment. In view of this, drawing support from the fact that the sojourn time of the purely discontinuous Markov process follows exponential distribution and the famous Fokker-Planck equation, the channel state matrix, the primary user’s accumulation sojourn time and the distribution condition of the primary user in the time domain can be derived. From the results of the simulation, this method can preferably perform the task of predicting of the channel state and the task of tracking the state of the primary users.