Title :
On the capacity of cognitive relay assisted Gaussian interference channel
Author :
Sridharan, Sriram ; Vishwanath, Sriram ; Jafar, Syed A. ; Shamai, Shlomo
Author_Institution :
Wireless Networking & Commun. Group, Univ. of Texas at Austin, Austin, TX
Abstract :
This paper studies a two source, two destination Gaussian interference channel in the presence of a cognitive relay. The cognitive relay has access to the messages transmitted by both the sources and assists them in communicating the messages successfully to their respective destinations. An achievable rate region for the system is derived by combining the Han-Kobayashi coding scheme for the general interference channel with dirty paper coding. The paper also derives outer bounds on the capacity region and obtains the degrees of freedom of the system.
Keywords :
Gaussian channels; channel coding; cognitive radio; Gaussian interference channel; Han-Kobayashi coding scheme; cognitive relay; dirty paper coding; general interference channel; Cognitive radio; Degradation; Gaussian channels; Interference channels; MIMO; Radio transmitters; Random variables; Relays; Time sharing computer systems; Wireless communication;
Conference_Titel :
Information Theory, 2008. ISIT 2008. IEEE International Symposium on
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-4244-2256-2
Electronic_ISBN :
978-1-4244-2257-9
DOI :
10.1109/ISIT.2008.4595046
