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Interference Channel with Generalized Feedback (a.k.a. with source cooperation): Part I: Achievable Region

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Title: Interference Channel with Generalized Feedback (a.k.a. with source cooperation): Part I: Achievable Region
Author(s): Yang, Shuang (Echo); Tuninetti, Daniela
Subject(s): achievable region binning generalized feedback Gaussian channel Interference channel
Abstract: An Interference Channel with Generalized Feedback (IFC-GF) models a wireless network where the sources can sense the channel activity. The signal overheard from the channel provides information about the activity of the other sources and thus furnishes the basis for cooperation. This two-part paper studies achievable strategies (Part I) and outer bounds (Part II) for the general discrete memoryless IFC-GF with two source-destination pairs. In Part I, the generalized feedback is used to gain knowledge about the message sent by the other source and then exploited in two ways: a) to relay the messages that can be decoded at both destinations, thus realizing the gains of beam-forming of a distributed multiantenna system, and b) to hide the messages that can not be decoded at the nonintended destination, thus leveraging the interference " precancellation" property of dirty-paper coding. We show that our achievable region generalizes several known achievable regions for the IFC-GF and that it reduces to known achievable regions for the channels subsumed by the IFC-GF model. For the Gaussian channel, it is shown that source cooperation enlarges the achievable rate region of the corresponding IFC without generalized feedback/cooperation.
Issue Date: 2011-05
Publisher: Institute of Electrical and Electronics Engineers
Citation Info: Yang, S. & Tuninetti, D. 2011. Interference Channel With Generalized Feedback (a.k.a. With Source Cooperation): Part I: Achievable Region. IEEE Transactions on Information Theory, 57(5): 2686-2710. DOI: 10.1109/TIT.2011.2119810
Type: Article
Description: © 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works. Post print version of article may differ from published version. The definitive version is available through IEEE at DOI: 10.1109/TIT.2011.2119810.
ISSN: 0018-9448
Sponsor: This work was partially funded by NSF under award number 0643954.
Date Available in INDIGO: 2011-05-27

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