An eigen-based MIMO multiuser scheduler robust to spatial channel correlation

Hakju Lee, Myeongcheol Shin, Chungyong Lee

Research output: Contribution to journalConference article

Abstract

An eigen-based MIMO multiuser scheduler which is robust to spatial channel correlation is proposed. The proposed scheduler uses the principal right singular vector for reduced feedback information and exploits the eigen-mode transmission using a precoder matrix, whose columns are the principal right singular vectors of selected users. Since the proposed scheduler uses only each principal eigen channel per user, it is not affected by spatial channel correlation even if all spatial channels are equal, which means only one dominant eigen channel. Moreover, since the distribution of singular value is concentrated on the principal singular value under the spatially correlated environments, more channel gain can be obtained. By computer simulations, it is shown that the proposed scheduler approaches closer to the Sato's bound and has better fairness performance under the moderate spatial channel correlation than the conventional schedulers using partial feedback.

Original languageEnglish
Pages (from-to)1134-1137
Number of pages4
JournalIEEE Vehicular Technology Conference
Volume61
Issue number2
Publication statusPublished - 2005 Oct 17
Event2005 IEEE 61st Vehicular Technology Conference -VTC 2005 - Spring Stockholm: Paving the Path for a Wireless Future - Stockholm, Sweden
Duration: 2005 May 302005 Jun 1

Fingerprint

Multiuser MIMO
Scheduler
MIMO systems
Feedback
Singular Vectors
Singular Values
Computer simulation
Fairness
Computer Simulation
Partial

All Science Journal Classification (ASJC) codes

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

Cite this

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abstract = "An eigen-based MIMO multiuser scheduler which is robust to spatial channel correlation is proposed. The proposed scheduler uses the principal right singular vector for reduced feedback information and exploits the eigen-mode transmission using a precoder matrix, whose columns are the principal right singular vectors of selected users. Since the proposed scheduler uses only each principal eigen channel per user, it is not affected by spatial channel correlation even if all spatial channels are equal, which means only one dominant eigen channel. Moreover, since the distribution of singular value is concentrated on the principal singular value under the spatially correlated environments, more channel gain can be obtained. By computer simulations, it is shown that the proposed scheduler approaches closer to the Sato's bound and has better fairness performance under the moderate spatial channel correlation than the conventional schedulers using partial feedback.",
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An eigen-based MIMO multiuser scheduler robust to spatial channel correlation. / Lee, Hakju; Shin, Myeongcheol; Lee, Chungyong.

In: IEEE Vehicular Technology Conference, Vol. 61, No. 2, 17.10.2005, p. 1134-1137.

Research output: Contribution to journalConference article

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