  In this paper, we investigate the impact of correlated fading on the
performance of wireless multiple access channels (MAC) in the presence and
absence of side information (SI) at transmitters, where the fading coefficients
are modeled according to the Fisher-Snedecor F distribution. Specifically, we
represent two scenarios: (i) clean MAC (i.e, without SI at transmitters), (ii)
doubly dirty MAC (i.e., with the non-causally known SI at transmitters). For
both system models, we derive the closedform expressions of the outage
probability (OP) as well as the average capacity (AC) under independent fading
conditions. Besides, exploiting copula theory, we obtain the exact analytical
expressions for the OP and the AC under positive dependence fading conditions
in both considered models. Finally, the validity of the analytical results is
illustrated numerically.
