Relay Channel With Structured Interference Known at the Source
The authors consider a relay channel in the presence of interference which is non-causally available only at the source. The interference signal may have structure, for example it could come from another source communicating with its own destination. However, the external interferer is not willing to adjust its communication strategy to minimize the interference and is considered to be fixed. Two approaches are possible to mitigate the interference: exploiting the structure or treating the interference as unstructured. Using these approaches, they establish bounds for the Gaussian relay channel with orthogonal components and discuss to the importance of exploiting the interference structure in multi-terminal scenarios.