Energy-efficient power allocation of two-hop cooperative systems with imperfect channel estimation

Handle URI:
http://hdl.handle.net/10754/578891
Title:
Energy-efficient power allocation of two-hop cooperative systems with imperfect channel estimation
Authors:
Amin, Osama; Bedeer, Ebrahim; Ahmed, Mohamed H.; Dobre, Octavia A.; Alouini, Mohamed-Slim ( 0000-0003-4827-1793 )
Abstract:
Recently, much attention has been paid to the green design of wireless communication systems using energy efficiency (EE) metrics that should capture all energy consumption sources to deliver the required data. In this paper, we formulate an accurate EE metric for cooperative two-hop systems that use the amplify-and-forward relaying scheme. Different from the existing research that assumes the availability of perfect channel state information (CSI) at the communication cooperative nodes, we assume a practical scenario, where training pilots are used to estimate the channels. The estimated CSI can be used to adapt the available resources of the proposed system in order to maximize the EE. Two estimation strategies are assumed namely disintegrated channel estimation, which assumes the availability of channel estimator at the relay, and cascaded channel estimation, where the relay is not equipped with channel estimator and only forwards the received pilot(s) in order to let the destination estimate the cooperative link. The channel estimation cost is reflected on the EE metric by including the estimation error in the signal-to-noise term and considering the energy consumption during the estimation phase. Based on the formulated EE metric, we propose an energy-aware power allocation algorithm to maximize the EE of the cooperative system with channel estimation. Furthermore, we study the impact of the estimation parameters on the optimized EE performance via simulation examples.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
2015 IEEE International Conference on Communication Workshop (ICCW)
Conference/Event name:
2015 IEEE International Conference on Communication Workshop (ICCW)
Issue Date:
8-Jun-2015
DOI:
10.1109/ICCW.2015.7247295
Type:
Conference Paper
Additional Links:
http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=7247295
Appears in Collections:
Conference Papers; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorAmin, Osamaen
dc.contributor.authorBedeer, Ebrahimen
dc.contributor.authorAhmed, Mohamed H.en
dc.contributor.authorDobre, Octavia A.en
dc.contributor.authorAlouini, Mohamed-Slimen
dc.date.accessioned2015-09-30T08:28:57Zen
dc.date.available2015-09-30T08:28:57Zen
dc.date.issued2015-06-08en
dc.identifier.doi10.1109/ICCW.2015.7247295en
dc.identifier.urihttp://hdl.handle.net/10754/578891en
dc.description.abstractRecently, much attention has been paid to the green design of wireless communication systems using energy efficiency (EE) metrics that should capture all energy consumption sources to deliver the required data. In this paper, we formulate an accurate EE metric for cooperative two-hop systems that use the amplify-and-forward relaying scheme. Different from the existing research that assumes the availability of perfect channel state information (CSI) at the communication cooperative nodes, we assume a practical scenario, where training pilots are used to estimate the channels. The estimated CSI can be used to adapt the available resources of the proposed system in order to maximize the EE. Two estimation strategies are assumed namely disintegrated channel estimation, which assumes the availability of channel estimator at the relay, and cascaded channel estimation, where the relay is not equipped with channel estimator and only forwards the received pilot(s) in order to let the destination estimate the cooperative link. The channel estimation cost is reflected on the EE metric by including the estimation error in the signal-to-noise term and considering the energy consumption during the estimation phase. Based on the formulated EE metric, we propose an energy-aware power allocation algorithm to maximize the EE of the cooperative system with channel estimation. Furthermore, we study the impact of the estimation parameters on the optimized EE performance via simulation examples.en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.relation.urlhttp://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=7247295en
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.titleEnergy-efficient power allocation of two-hop cooperative systems with imperfect channel estimationen
dc.typeConference Paperen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.identifier.journal2015 IEEE International Conference on Communication Workshop (ICCW)en
dc.conference.date8-12 June 2015en
dc.conference.name2015 IEEE International Conference on Communication Workshop (ICCW)en
dc.conference.locationLondon, United Kingdomen
dc.eprint.versionPost-printen
dc.contributor.institutionSchool of Engineering, University of British Columbia, Kelowna, BC V1V 1V7, Canadaen
dc.contributor.institutionFaculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John’s, NL, A1B 3X5, Canadaen
kaust.authorAmin, Osamaen
kaust.authorAlouini, Mohamed-Slimen
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