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Author Cardone, Martina
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Unilateral Source Cooperation ♦ Approximate Sum-capacity ♦ Half-duplex Asymmetric Interference Channel ♦ Noncooperative Interference Channel ♦ Classical Channel Model ♦ Primary Source ♦ Cooperative Secondary Cognitive Source ♦ Causal Cognitive Radio Channel ♦ Half-duplex Mode ♦ Interference-asymmetric Channel ♦ Noisy Link ♦ Different Model ♦ Practical System ♦ Cognitive Source ♦ Noncausal Cognitive Channel ♦ Generalized Degrees-of-freedom ♦ Causal Cognition ♦ Unilateral Cooperation ♦ Constant Gap ♦ Causal Cognitive Radio Offer Benefit ♦ Interference-symmetric Channel
Abstract Abstract—This paper focuses on the causal cognitive radio channel. Thismodelconsistsofatwo-userGaussianinterference 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 sumcapacity 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 noncausal cognitive channel, are identified in order to determine when causal cognitive radio offers benefits in practical systems. I.
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Publisher Date 2013-01-01