The capacity of the semi-deterministic cognitive interference channel with a common cognitive message and approximate capacity for the Gaussian case

Stefano Rini*, Carolin Huppert

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

In this paper we study the cognitive interference channel with a common message, a variation of the classical cognitive interference channel in which the cognitive message is decoded at both receivers. We derive the capacity for the semi-deterministic model, a class of channels in which the output at the cognitive decoder is a deterministic function of the channel inputs. We also show capacity to within a constant gap and a constant factor for the Gaussian channel. Most of these results are shown using an interesting transmission scheme in which the cognitive message, decoded at both receivers, is also pre-coded against the interference experienced at the cognitive receiver. The pre-coding of the cognitive message does not allow the primary decoder to reconstruct the interfering signal; the cognitive message acts instead as a side information at the primary receiver when decoding its intended message.

Original languageEnglish
Title of host publication2012 IEEE International Symposium on Information Theory Proceedings, ISIT 2012
Pages1812-1816
Number of pages5
DOIs
StatePublished - 22 Oct 2012
Event2012 IEEE International Symposium on Information Theory, ISIT 2012 - Cambridge, MA, United States
Duration: 1 Jul 20126 Jul 2012

Publication series

NameIEEE International Symposium on Information Theory - Proceedings

Conference

Conference2012 IEEE International Symposium on Information Theory, ISIT 2012
CountryUnited States
CityCambridge, MA
Period1/07/126/07/12

Keywords

  • approximate capacity
  • binning
  • cognitive interference channel
  • semi-deterministic channel
  • superposition

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