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A novel two-state Markov channel model is proposed，which assumes that the envelope of the received signal subjccts to Riciean distribution for an ideal channel state while the envelope of the received signal Corazzas channel model for a non-ideal channel state.The comparative results of the cumulative distribution，the level.crOssiIlg rate as well as the-average duradon of fades of simulation and measurement show that the assumption is simple，reasonable and useful in practice.