Improper Gaussian signaling in full-duplex relay channels with residual self-interference

Handle URI:
http://hdl.handle.net/10754/621317
Title:
Improper Gaussian signaling in full-duplex relay channels with residual self-interference
Authors:
Gaafar, Mohamed ( 0000-0003-2915-644X ) ; Khafagy, Mohammad Galal ( 0000-0001-7578-9702 ) ; Amin, Osama; Alouini, Mohamed-Slim ( 0000-0003-4827-1793 )
Abstract:
We study the potential employment of improper Gaussian signaling (IGS) in full-duplex cooperative settings with residual self-interference (RSI). IGS is recently shown to outperform traditional proper Gaussian signaling (PGS) in several interference-limited channel settings. In this work, IGS is employed in an attempt to alleviate the RSI adverse effect in full-duplex relaying (FDR). To this end, we derive a tight upper bound expression for the end-to-end outage probability in terms of the relay signal parameters represented in its power and circularity coefficient. We further show that the derived upper bound is either monotonic or unimodal in the relay's circularity coefficient. This result allows for easily locating the global optimal point using known numerical methods. Based on the analysis, IGS allows FDR systems to operate even with high RSI. It is shown that, while the communication totally fails with PGS as the RSI increases, the IGS outage probability approaches a fixed value that depends on the channel statistics and target rate. The obtained results show that IGS can leverage higher relay power budgets than PGS to improve the performance, meanwhile it relieves its RSI impact via tuning the signal impropriety. © 2016 IEEE.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Citation:
Gaafar M, Khafagy MG, Amin O, Alouini M-S (2016) Improper Gaussian signaling in full-duplex relay channels with residual self-interference. 2016 IEEE International Conference on Communications (ICC). Available: http://dx.doi.org/10.1109/ICC.2016.7511009.
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
2016 IEEE International Conference on Communications (ICC)
Conference/Event name:
2016 IEEE International Conference on Communications, ICC 2016
Issue Date:
26-Jul-2016
DOI:
10.1109/ICC.2016.7511009
Type:
Conference Paper
Appears in Collections:
Conference Papers; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorGaafar, Mohameden
dc.contributor.authorKhafagy, Mohammad Galalen
dc.contributor.authorAmin, Osamaen
dc.contributor.authorAlouini, Mohamed-Slimen
dc.date.accessioned2016-11-03T06:57:33Z-
dc.date.available2016-11-03T06:57:33Z-
dc.date.issued2016-07-26en
dc.identifier.citationGaafar M, Khafagy MG, Amin O, Alouini M-S (2016) Improper Gaussian signaling in full-duplex relay channels with residual self-interference. 2016 IEEE International Conference on Communications (ICC). Available: http://dx.doi.org/10.1109/ICC.2016.7511009.en
dc.identifier.doi10.1109/ICC.2016.7511009en
dc.identifier.urihttp://hdl.handle.net/10754/621317-
dc.description.abstractWe study the potential employment of improper Gaussian signaling (IGS) in full-duplex cooperative settings with residual self-interference (RSI). IGS is recently shown to outperform traditional proper Gaussian signaling (PGS) in several interference-limited channel settings. In this work, IGS is employed in an attempt to alleviate the RSI adverse effect in full-duplex relaying (FDR). To this end, we derive a tight upper bound expression for the end-to-end outage probability in terms of the relay signal parameters represented in its power and circularity coefficient. We further show that the derived upper bound is either monotonic or unimodal in the relay's circularity coefficient. This result allows for easily locating the global optimal point using known numerical methods. Based on the analysis, IGS allows FDR systems to operate even with high RSI. It is shown that, while the communication totally fails with PGS as the RSI increases, the IGS outage probability approaches a fixed value that depends on the channel statistics and target rate. The obtained results show that IGS can leverage higher relay power budgets than PGS to improve the performance, meanwhile it relieves its RSI impact via tuning the signal impropriety. © 2016 IEEE.en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.titleImproper Gaussian signaling in full-duplex relay channels with residual self-interferenceen
dc.typeConference Paperen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.identifier.journal2016 IEEE International Conference on Communications (ICC)en
dc.conference.date22 May 2016 through 27 May 2016en
dc.conference.name2016 IEEE International Conference on Communications, ICC 2016en
kaust.authorGaafar, Mohameden
kaust.authorKhafagy, Mohammad Galalen
kaust.authorAmin, Osamaen
kaust.authorAlouini, Mohamed-Slimen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.