Gaussian interference channel with state information

In this paper, we study the two-user state-dependent Gaussian interference channel, where the Gaussian distributed state information is non-causally known at both transmitters, but unknown to either of the receivers. We focus on the simultaneous encoding scheme and propose an active interference cancelation mechanism, which is a generalized dirty-paper coding technique, to partially eliminate the state effect at the receivers. The corresponding achievable rate region is derived and the strong interference case is studied, where we propose several heuristic schemes and provide numerical results to show that active interference cancelation significantly enlarges the achievable rate region.