(Sub-)Optimality of Treating Interference as Noise in the Cellular Uplink With Weak Interference

Handle URI:
http://hdl.handle.net/10754/602308
Title:
(Sub-)Optimality of Treating Interference as Noise in the Cellular Uplink With Weak Interference
Authors:
Gherekhloo, Soheil; Chaaban, Anas ( 0000-0002-8713-5084 ) ; Di, Chen; Sezgin, Aydin
Abstract:
Despite the simplicity of the scheme of treating interference as noise (TIN), it was shown to be sum-capacity optimal in the Gaussian interference channel (IC) with very-weak (noisy) interference. In this paper, the two-user IC is altered by introducing an additional transmitter that wants to communicate with one of the receivers of the IC. The resulting network thus consists of a point-to-point channel interfering with a multiple access channel (MAC) and is denoted by PIMAC. The sum-capacity of the PIMAC is studied with main focus on the optimality of TIN. It turns out that TIN in its naive variant, where all transmitters are active and both receivers use TIN for decoding, is not the best choice for the PIMAC. In fact, a scheme that combines both time division multiple access and TIN (TDMA-TIN) strictly outperforms the naive-TIN scheme. Furthermore, it is shown that in some regimes, TDMA-TIN achieves the sum-capacity for the deterministic PIMAC and the sum-capacity within a constant gap for the Gaussian PIMAC. In addition, it is shown that, even for very-weak interference, there are some regimes where a combination of interference alignment with power control and TIN at the receiver side outperforms TDMA-TIN. As a consequence, on the one hand, TIN in a cellular uplink is approximately optimal in certain regimes. On the other hand, those regimes cannot be simply described by the strength of interference.
KAUST Department:
Electrical Engineering Program
Citation:
(Sub-)Optimality of Treating Interference as Noise in the Cellular Uplink With Weak Interference 2016, 62 (1):322 IEEE Transactions on Information Theory
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
IEEE Transactions on Information Theory
Issue Date:
9-Nov-2015
DOI:
10.1109/TIT.2015.2499189
Type:
Article
ISSN:
0018-9448; 1557-9654
Sponsors:
The authors would like to thank the reviewers and the editor for invaluable comments which helped significantly improve the quality of this paper.
Additional Links:
http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=7322253
Appears in Collections:
Articles; Electrical Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorGherekhloo, Soheilen
dc.contributor.authorChaaban, Anasen
dc.contributor.authorDi, Chenen
dc.contributor.authorSezgin, Aydinen
dc.date.accessioned2016-03-21T12:23:30Zen
dc.date.available2016-03-21T12:23:30Zen
dc.date.issued2015-11-09en
dc.identifier.citation(Sub-)Optimality of Treating Interference as Noise in the Cellular Uplink With Weak Interference 2016, 62 (1):322 IEEE Transactions on Information Theoryen
dc.identifier.issn0018-9448en
dc.identifier.issn1557-9654en
dc.identifier.doi10.1109/TIT.2015.2499189en
dc.identifier.urihttp://hdl.handle.net/10754/602308en
dc.description.abstractDespite the simplicity of the scheme of treating interference as noise (TIN), it was shown to be sum-capacity optimal in the Gaussian interference channel (IC) with very-weak (noisy) interference. In this paper, the two-user IC is altered by introducing an additional transmitter that wants to communicate with one of the receivers of the IC. The resulting network thus consists of a point-to-point channel interfering with a multiple access channel (MAC) and is denoted by PIMAC. The sum-capacity of the PIMAC is studied with main focus on the optimality of TIN. It turns out that TIN in its naive variant, where all transmitters are active and both receivers use TIN for decoding, is not the best choice for the PIMAC. In fact, a scheme that combines both time division multiple access and TIN (TDMA-TIN) strictly outperforms the naive-TIN scheme. Furthermore, it is shown that in some regimes, TDMA-TIN achieves the sum-capacity for the deterministic PIMAC and the sum-capacity within a constant gap for the Gaussian PIMAC. In addition, it is shown that, even for very-weak interference, there are some regimes where a combination of interference alignment with power control and TIN at the receiver side outperforms TDMA-TIN. As a consequence, on the one hand, TIN in a cellular uplink is approximately optimal in certain regimes. On the other hand, those regimes cannot be simply described by the strength of interference.en
dc.description.sponsorshipThe authors would like to thank the reviewers and the editor for invaluable comments which helped significantly improve the quality of this paper.en
dc.language.isoenen
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.relation.urlhttp://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=7322253en
dc.rights(c) 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, 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 components of this work in other works.en
dc.subjectGaussian channelen
dc.subjectTreating interference as noise (TIN)en
dc.subjectgeneralized degrees of freedom (GdoF)en
dc.subjectlinear deterministic channel modelen
dc.subjectsum capacityen
dc.title(Sub-)Optimality of Treating Interference as Noise in the Cellular Uplink With Weak Interferenceen
dc.typeArticleen
dc.contributor.departmentElectrical Engineering Programen
dc.identifier.journalIEEE Transactions on Information Theoryen
dc.eprint.versionPost-printen
dc.contributor.institutionInstitute of Digital Communication Systems, Ruhr-Universit├Ąt Bochum, Germanyen
dc.contributor.institutionUniversity of Rostock, Germanyen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorChaaban, Anasen
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