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We investigate the impact of fading correlation on the performance of thedoubly dirty fading multiple access channel (MAC) with non-causally known sideinformation at transmitters. Using Copula theory, we derive closed-formexpressions for the outage probability and the coverage region under arbitrarydependence conditions. We show that a positive dependence structure between thefading channel coefficients is beneficial for the system performance, as itimproves the outage probability and extends the coverage region compared to thecase of independent fading. Conversely, a negative dependence structure has adetrimental effect on both performance metrics.

The Role of Correlation in the Doubly Dirty Fading MAC with Side Information at the Transmitters