An efficient CQI feedback scheme for multiuser MIMO systems

Myeon Gyun Cho, Youngju Kim, Youngsoo Kim, Daesik Hong

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

6 Citations (Scopus)

Abstract

An opportunistic scheduling is adopted to improve the capacity of the system by exploiting the multiuser diversity of multiuser MIMO (MU-MIMO) systems. However, it requires a large amount of feedback carrying the channel quality information (CQI) of each user to the transmitter. The considered Per User Unitary and Rate Control (PU2RC) needs to feedback the preferred precoding index and its CQIs, and it has a defect in scheduling the streams for the grouped user. In order to overcome these drawbacks, a novel feedback reduction scheme is proposed and is modified for OFDMA systems in this paper. It employs transmitter controlled precoding and opportunistic feedback (TCP-OFB) in conjunction with frequency scheduling. The simulation results demonstrate that TCP-OFB/OFDMA shows comparable performance to PU2RC while it only requires far reduced feedback load.

Original languageEnglish
Title of host publication2007 IEEE 66th Vehicular Technology Conference, VTC 2007-Fall
Pages625-629
Number of pages5
DOIs
Publication statusPublished - 2007 Dec 1
Event2007 IEEE 66th Vehicular Technology Conference, VTC 2007-Fall - Baltimore, MD, United States
Duration: 2007 Sep 302007 Oct 3

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)1550-2252

Other

Other2007 IEEE 66th Vehicular Technology Conference, VTC 2007-Fall
CountryUnited States
CityBaltimore, MD
Period07/9/3007/10/3

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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  • Cite this

    Cho, M. G., Kim, Y., Kim, Y., & Hong, D. (2007). An efficient CQI feedback scheme for multiuser MIMO systems. In 2007 IEEE 66th Vehicular Technology Conference, VTC 2007-Fall (pp. 625-629). [4349790] (IEEE Vehicular Technology Conference). https://doi.org/10.1109/VETECF.2007.141