Joint optimization of CQI calculation and interference mitigation for user scheduling in MIMO-OFDM systems

Handle URI:
http://hdl.handle.net/10754/564378
Title:
Joint optimization of CQI calculation and interference mitigation for user scheduling in MIMO-OFDM systems
Authors:
Sadek, Mirette; Aïssa, Sonia
Abstract:
In MIMO-OFDM multiuser systems, user scheduling is employed as a means of multiple access. In a downlink scenario, users that share the same subcarriers of an OFDM symbol are separated through precoding in order to achieve space division multiple access (SDMA). User scheduling techniques rely on channel knowledge at the transmitter, namely, the so-called channel quality indicator (CQI). In this paper, we implement a leakage-based precoding algorithm whose purpose is twofold. First, it is used to compute a reliable CQI based on a group of precoding vectors that are adapted to the channel. Then, it implements user scheduling through using the optimum vectors for precoding, thus minimizing interference among users. We also introduce the concept of resource block size adaptivity. The resource block (RB) is defined as the least unit in an OFDM symbol that a user can be assigned to. We propose a variable RB size that adapts to the channel conditions. © 2011 IEEE.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
2011 IEEE 73rd Vehicular Technology Conference (VTC Spring)
Conference/Event name:
2011 IEEE 73rd Vehicular Technology Conference, VTC2011-Spring
Issue Date:
May-2011
DOI:
10.1109/VETECS.2011.5956653
Type:
Conference Paper
ISSN:
15502252
ISBN:
9781424483310
Appears in Collections:
Conference Papers; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorSadek, Miretteen
dc.contributor.authorAïssa, Soniaen
dc.date.accessioned2015-08-04T06:25:29Zen
dc.date.available2015-08-04T06:25:29Zen
dc.date.issued2011-05en
dc.identifier.isbn9781424483310en
dc.identifier.issn15502252en
dc.identifier.doi10.1109/VETECS.2011.5956653en
dc.identifier.urihttp://hdl.handle.net/10754/564378en
dc.description.abstractIn MIMO-OFDM multiuser systems, user scheduling is employed as a means of multiple access. In a downlink scenario, users that share the same subcarriers of an OFDM symbol are separated through precoding in order to achieve space division multiple access (SDMA). User scheduling techniques rely on channel knowledge at the transmitter, namely, the so-called channel quality indicator (CQI). In this paper, we implement a leakage-based precoding algorithm whose purpose is twofold. First, it is used to compute a reliable CQI based on a group of precoding vectors that are adapted to the channel. Then, it implements user scheduling through using the optimum vectors for precoding, thus minimizing interference among users. We also introduce the concept of resource block size adaptivity. The resource block (RB) is defined as the least unit in an OFDM symbol that a user can be assigned to. We propose a variable RB size that adapts to the channel conditions. © 2011 IEEE.en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.titleJoint optimization of CQI calculation and interference mitigation for user scheduling in MIMO-OFDM systemsen
dc.typeConference Paperen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journal2011 IEEE 73rd Vehicular Technology Conference (VTC Spring)en
dc.conference.date15 May 2011 through 18 May 2011en
dc.conference.name2011 IEEE 73rd Vehicular Technology Conference, VTC2011-Springen
dc.conference.locationBudapesten
dc.contributor.institutionINRS-EMT, University of Quebec, Montreal, QC, Canadaen
kaust.authorSadek, Miretteen
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