The dependence of fading coefficients of wireless communication channels on each other affects communication performances such as Outage probability (OP), coverage region, energy efficiency, and secrecy capacity, possibly being constructive or destructive. In this paper, the outage probability as one of the most important wireless communication performances is investigated by using Copula theory. For this purpose, a wireless three-user multiple access channel (MAC) with Rayleigh fading and independent sources is considered and the outage probability in positive and negative dependence cases is compared. The results show that a negative dependence structure reduces the outage probability (compared to the independent state), but a positive dependence structure increases it.

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