On the Capacity of Joint Fading and Two-path Shadowing Channels
  The ergodic and outage channel capacity of different optimal and suboptimal combinations of transmit power and modulation rate adaptation strategies over a joint fading and two-path shadowing (JFTS) fading/shadowing channel is studied in this paper. Analytically tractable expressions for channel capacity are obtained, assuming perfect channel side information (CSI) at the receiver and/or the transmitter with negligible feedback delay. Furthermore, the impacts of the JFTS parameters on the channel capacity achieved by these adaptive transmission techniques are determined. 
I. Dey (Student Member, IEEE), G. G. Messier (Member, IEEE), and S.   Magierowski (Member, IEEE)
cs.IT math.IT