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

Mirette Sadek, Sonia Aïssa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

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.
Original languageEnglish (US)
Title of host publication2011 IEEE 73rd Vehicular Technology Conference (VTC Spring)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
ISBN (Print)9781424483310
DOIs
StatePublished - May 2011

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01

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