  In this paper, we propose a model for large scale fading channels via markov
process. We exploit the channel delay profile and the dependency between
channel states via a first order autoregressive model that cast insight to the
channel variations under fading and the closed form delay induced. We propose a
network-coding structure that can be employed to compensate for the channel
variations under fixed power and to the period of zero packet transmissions
under adaptive power control. Satellite communications is an application to the
model proposed.
