On the Totally Asynchronous Interference Channel with Single-User Receivers
Document typeConference report
PublisherIEEE Press. Institute of Electrical and Electronics Engineers
Rights accessOpen Access
European Commisision's projectROCKET - Reconfigurable OFDMA-based Cooperative NetworKs Enabled by Agile SpecTrum Use (EC-FP7-215282)
The performance characterization of decentralized wireless networks with uncoordinated sender-destination pairs motivates the study of the totally asynchronous interference channel with single-user receivers. Since this channel is not information stable, its capacity region is determined resorting to information density, although more amenable single-letter inner and outer bounds are provided as well. Aiming at numerical evaluation of the achievable rates, we subsequently concentrate on the inner bound for the Gaussian case. We show that taking Gaussian inputs is not the best choice in general and derive analytical conditions under which other input distributions may be optimal. Essentially, these conditions require the channel to be interference-limited. Finally, the existence of such non-Gaussian distributions with superior performance is validated numerically in different scenarios.
CitationCalvo, E.; Rodriguez, J.; Vidal, J. On the Totally Asynchronous Interference Channel with Single-User Receivers. A: IEEE International Symposium on Information Theory. "2009 IEEE International Symposium on Information Theory". Seoul: IEEE Press. Institute of Electrical and Electronics Engineers, 2009, p. 2587-2591.