System level modeling and simulation have become a key issue in analyzing, optimizing and designing wireless systems. In this paper, modeling RF front end devices and radio propaga- tion channel especially fading time-variant channel for Inter- Vehicle Communication using SystemC-AMS are investigated. Discrete baseband wireless channel model based on Tapped Delay Line model is presented. Time-variant Rayleigh and Rician fading are implemented in SystemC-AMS. The capabilities of SystemC- AMS are tested and compared to matlab for five vehicles scenario. With this framework, several criteria such as performance and optimal value of the system parameters of a WSN node can be evaluated and predicted before any hardware and software design.