Abstract:

In order to resolve the problem of cognitive radio spectrum sensing with continuous-time measurement, a spectrum sensing method based on the pu
rely discontinuous Markov process was proposed. The channel state can be divided into idle and busy state. 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.

Key words: cognitive radio(CR), spectrum sensing, channel state, purely discontinuous Markov process