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Abstract: The wide-sense stationary uncorrelated scattering (WSSUS) model has long been viewed as a basic channel model to describe the fading dispersive channel. But non-WSSUS models have more universal applicability when the wireless mobile channel with broadband is studied with finer and more detailed knowledge of propagation environments. So the four-Dimension (4-D) characteristics of channel, namely time, lag, frequency, and Doppler, should be studied together. In this paper, Wigner-Ville distribution of Time-Frequency (TF) domain is introduced to analyze channel in which the incidence rays are non-stationary and correlated with each other. Several channel models, according to different move modes of incidence rays, with time-varying Doppler shift are designed and 4-D local scattering function (LSF) are computed and simulated respectively. Our simulation results show the LSF present asymmetric and non-periodic TF distribution for some symmetric and periodic move modes of incidence rays. 12 Refs. In English.

Key words: non-WSSUS; channel stimulation; local scattering function; Wigner-Ville distribution; Doppler shift