Downlink scheduling using non-orthogonal uplink beams

Handle URI:
http://hdl.handle.net/10754/564900
Title:
Downlink scheduling using non-orthogonal uplink beams
Authors:
Eltayeb, Mohammed E.; Al-Naffouri, Tareq Y.; Bahrami, Hamid Reza Talesh
Abstract:
Opportunistic schedulers rely on the feedback of the channel state information of users in order to perform user selection and downlink scheduling. This feedback increases with the number of users, and can lead to inefficient use of network resources and scheduling delays. We tackle the problem of feedback design, and propose a novel class of nonorthogonal codes to feed back channel state information. Users with favorable channel conditions simultaneously transmit their channel state information via non-orthogonal beams to the base station. The proposed formulation allows the base station to identify the strong users via a simple correlation process. After deriving the minimum required code length and closed-form expressions for the feedback load and downlink capacity, we show that i) the proposed algorithm reduces the feedback load while matching the achievable rate of full feedback algorithms operating over a noiseless feedback channel, and ii) the proposed codes are superior to the Gaussian codes.
KAUST Department:
Electrical Engineering Program
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
2014 IEEE Wireless Communications and Networking Conference (WCNC)
Conference/Event name:
2014 IEEE Wireless Communications and Networking Conference, WCNC 2014
Issue Date:
Apr-2014
DOI:
10.1109/WCNC.2014.6952399
Type:
Conference Paper
ISSN:
15253511
ISBN:
9781479930838
Appears in Collections:
Conference Papers; Electrical Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorEltayeb, Mohammed E.en
dc.contributor.authorAl-Naffouri, Tareq Y.en
dc.contributor.authorBahrami, Hamid Reza Taleshen
dc.date.accessioned2015-08-04T07:24:34Zen
dc.date.available2015-08-04T07:24:34Zen
dc.date.issued2014-04en
dc.identifier.isbn9781479930838en
dc.identifier.issn15253511en
dc.identifier.doi10.1109/WCNC.2014.6952399en
dc.identifier.urihttp://hdl.handle.net/10754/564900en
dc.description.abstractOpportunistic schedulers rely on the feedback of the channel state information of users in order to perform user selection and downlink scheduling. This feedback increases with the number of users, and can lead to inefficient use of network resources and scheduling delays. We tackle the problem of feedback design, and propose a novel class of nonorthogonal codes to feed back channel state information. Users with favorable channel conditions simultaneously transmit their channel state information via non-orthogonal beams to the base station. The proposed formulation allows the base station to identify the strong users via a simple correlation process. After deriving the minimum required code length and closed-form expressions for the feedback load and downlink capacity, we show that i) the proposed algorithm reduces the feedback load while matching the achievable rate of full feedback algorithms operating over a noiseless feedback channel, and ii) the proposed codes are superior to the Gaussian codes.en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.titleDownlink scheduling using non-orthogonal uplink beamsen
dc.typeConference Paperen
dc.contributor.departmentElectrical Engineering Programen
dc.identifier.journal2014 IEEE Wireless Communications and Networking Conference (WCNC)en
dc.conference.date6 April 2014 through 9 April 2014en
dc.conference.name2014 IEEE Wireless Communications and Networking Conference, WCNC 2014en
dc.contributor.institutionDepartment of Electrical and Computer Engineering, University of AkronOH, United Statesen
kaust.authorAl-Naffouri, Tareq Y.en
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