Graduate School and Research Center in Digital Sciences

On the capacity of the two user gaussian causal cognitive interference channel

Cardone, Martina; Tuninetti, Daniela; Knopp, Raymond; Salim, Umer

IEEE Transactions on Information Theory, Volume 60, N°5, May 2014, ISSN: 0018-9448

This paper considers the two-user Gaussian Causal Cognitive Interference Channel (GCCIC), which consists of two source-destination pairs that share the same channel and where one full-duplex cognitive source can causally learn the message of the primary source through a noisy link. The GCCIC is an interference channel with unilateral source cooperation that better models practical cognitive radio networks than the commonly used model which assumes that one source has perfect non-causal knowledge of the other source's message. First the sum-capacity of the symmetric GCCIC is determined to within a constant gap. Then, the insights gained from the derivation of the symmetric sum-capacity are extended to characterize the whole capacity region to within a constant gap for more general cases. In particular, the capacity is determined (a) to within 2 bits for the fully connected GCCIC when, roughly speaking, the interference is not weak at both receivers, (b) to within 2 bits for the Z-channel, i.e., when there is no interference from the primary user, and (c) to within 2 bits for the S-channel, i.e., when there is no interference from the secondary user.  

Document Doi Arxiv Hal Bibtex

Title:On the capacity of the two user gaussian causal cognitive interference channel
Keywords:Cognitive Radio, Cooperative Communication, Causal Cooperation, Interference Channel, Binning, Dirty Paper, Coding, Superposition Coding, Generalized Degrees of Freedom, Z-channel, Constant Gap
Type:Journal
Language:English
City:
Date:
Department:Communication systems
Eurecom ref:3879
Copyright: © 2013 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Bibtex: @article{EURECOM+3879, doi = {http://dx.doi.org/10.1109/TIT.2014.2311905 }, year = {2013}, month = {07}, title = {{O}n the capacity of the two user gaussian causal cognitive interference channel}, author = {{C}ardone, {M}artina and {T}uninetti, {D}aniela and {K}nopp, {R}aymond and {S}alim, {U}mer}, journal = {{IEEE} {T}ransactions on {I}nformation {T}heory, {V}olume 60, {N}°5, {M}ay 2014, {ISSN}: 0018-9448 }, url = {http://www.eurecom.fr/publication/3879} }
See also: