Capacity to Within a Constant Gap for a Class of Interference Relay Channels

German Bassi (1) , Pablo Piantanida (1) , Sheng Yang (1)

1 E3S - Supélec Sciences des Systèmes

In this paper, we derive a new outer and two inner bounds for a class of Interference Relay Channels (IRCs) which includes the Gaussian IRC as a special case. The inner bounds are based on the idea of rate-splitting at the sources with either decode-and-forward (DF) or compress-and-forward (CF) at the relay. Our main contribution lies in showing for a wide range of regimes of the Gaussian IRC that either the DF or the CF inner bound achieves the upper bound to within a constant gap regardless of the channel parameters.

Domaines: Théorie de l'information et codage [math.IT]; Théorie de l'information [cs.IT]

German Bassi, Pablo Piantanida, Sheng Yang. Capacity to Within a Constant Gap for a Class of Interference Relay Channels. 2013 51st Annual Allerton Conference on Communication, Control, and Computing (Allerton) , Oct 2013, Monticello, United States. ⟨10.1109/Allerton.2013.6736676⟩. ⟨hal-00907032⟩