A new simulation model for non-stationary fading channel

In this paper, we present a new simulation model, called as sum-of-linear-frequency-modulation (SOLFM) model, based on the sum-of-cisoids (SOC) model. The new model has ability to simulate non-stationary fading channels under time-variant scattering environments. We also propose an effective parameter computation method, which can reproduce time-variant statistical properties of real-word channels. The simulation results demonstrate that our model has the ability to generate non-stationary fading channels, which provide close approximation on the time-variant statistical characteristics with the theoretical ones along time.