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On the Capacity of the Cognitive Interference Channel with a Relay

Reátegui del Águila, Fernando, Imran, Muhammad Ali and Tafazolli, Rahim (2014) On the Capacity of the Cognitive Interference Channel with a Relay In: IEEE Wireless Communications and Networking Conference (WCNC), 6-9 April 2014, Istambul, Turkey.

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Interference forwarding has been shown to be beneficial in the interference channel with a relay as it enlarges the strong interference region, allowing the decoding of the interference at the receivers for larger ranges of the channel gains. In this work we demonstrate the benefit of adding a relay to the cognitive interference channel. We pay special attention to the effect of interference forwarding in this configuration. Two setups are presented. In the first, the interference forwarded by the relay is the primary user's signal, and in the second, this is the cognitive user's signal. We characterise the capacity regions of these two models in the case of strong interference. We show that as opposed to the first setup, in the second setup the capacity region is enlarged, compared to the capacity region of the cognitive interference channel, when the relay does not help the intended receiver.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Communication Systems Research
Authors :
Reátegui del Águila, FernandoUNSPECIFIEDUNSPECIFIED
Imran, Muhammad
Date : April 2014
Identification Number : 10.1109/WCNC.2014.6951938
Additional Information : © 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Depositing User : Fernando Reategui Del Aguila
Date Deposited : 24 Feb 2015 14:50
Last Modified : 24 Feb 2015 14:50

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