An efficient context tree based model for RAKE and flat fading channel

The problem of a flat fading channel and RAKE output reliable model for all regimes is studied. The proposed solution is based on the separation between the channel evolution and the transmission rate. By applying the Shannon theorem to the complex Gaussian fading processes, we build the context tree that provides samples with suitable correlation properties. Then an interpolator is used to provide the channel outputs at the transmission rate. We show that the RAKE output is a band limited process which allows to use the same principle. A high reliability of the outputs is obtained and the simulation speed up is considerable specially for multipath channel cases.