Approximate sum-capacity of full- and half-duplex asymmetric interference channels with unilateral source cooperation

Martina Cardone, Daniela Tuninetti, Raymond Knopp, Umer Salim

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations

Abstract

This paper focuses on the causal cognitive radio channel. This model consists of a two-user Gaussian interference channel where a cooperative secondary/cognitive source can causally learn the message of a primary source through a noisy link. The generalized Degrees-of-Freedom (gDoF) and the sum-capacity to within a constant gap are characterized for channels where one destination does not experience interference, referred to as interference-asymmetric channels. Both cases where the cognitive source operates in full- and half-duplex mode are considered. The different models are compared among themselves and with the case of interference-symmetric channels with either bilateral or unilateral source cooperation. In particular, the parameter regimes where causal cognition, or unilateral cooperation, attains the same gDoF of classical channel models, such as the noncooperative interference channel and the non-causal cognitive channel, are identified in order to determine when causal cognitive radio offers benefits in practical systems.

Original languageEnglish (US)
Pages392-400
Number of pages9
DOIs
StatePublished - 2013
Event2013 Information Theory and Applications Workshop, ITA 2013 - San Diego, CA, United States
Duration: Feb 10 2013Feb 15 2013

Other

Other2013 Information Theory and Applications Workshop, ITA 2013
CountryUnited States
CitySan Diego, CA
Period2/10/132/15/13

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