NDLI: Combining superposition coding and binning achieves capacity for the Gaussian cognitive interference channel

Content Provider	IEEE Xplore Digital Library
Author	Rini, S. Kurniawan, E. Goldsmith, A.
Copyright Year	2012
Description	Author affiliation: Stanford University, CA, USA (Kurniawan, E.; Goldsmith, A.) \|\| Technische Universität München, Munich, Germany (Rini, S.)
Abstract	The cognitive interference channel models cognitive overlay radio systems, in which cognitive radios overhear the transmission of neighboring nodes. For the Gaussian case capacity is known in three subsets of the parameter space: the “weak interference”, “very strong interference” and “primary decodes cognitive” regime. Capacity in the “very strong interference” regime is achieved by superposing the cognitive message over the primary message while in the “primary decodes cognitive” regime the cognitive message is binned against the primary message. This paper provides a new capacity result obtained by combining the capacity achieving schemes in these two regimes thus generalizing and extending these results. Interestingly, the capacity achieving strategy for a given channel also depends on the level of cooperation among the users: that is, either superposition coding or binning is employed depending on the amount of power allotted by the cognitive transmitter to aid the primary user.
Starting Page	227
Ending Page	231
File Size	3065169
Page Count	5
File Format	PDF
ISBN	9781467302241
e-ISBN	9781467302234
e-ISBN	9781467302227
DOI	10.1109/ITW.2012.6404664
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-09-03
Publisher Place	Switzerland
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Binning Superposition coding Conferences Cognitive interference channel Capacity Receivers Encoding Interference channels Decoding
Content Type	Text
Resource Type	Article

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