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A New Outer Bound for a Class of Interference Channels with a Cognitive Relay and a Certain Capacity Result

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3 Author(s)
Charmchi, H. ; Dept. of Electr. Eng., Sharif Univ. of Technol., Tehran, Iran ; Hodtani, G.A. ; Nasiri-Kenari, M.

The interference channel with a cognitive relay is a variation of the classical two-user interference channel in which a relay aids the transmission among the users. The relay is assumed to have genie-aided cognition: that is it has full, a-priori, knowledge of the messages to be transmitted. We obtain a new outer bound for this channel model and prove capacity for a class of channels in which the transmissions of the two users are non interfering. This capacity result improves on a previous result for the Gaussian case in which the capacity was proved to within a gap of 3 bits/s/Hz.

Published in:

Communications Letters, IEEE  (Volume:17 ,  Issue: 2 )

Date of Publication:

February 2013

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