An efficient resource-allocation scheme for spatial multiuser access in MIMO/OFDM systems

Ying Jun Zhang, Khaled Letaief

Research output: Contribution to journalArticle

187 Citations (Scopus)

Abstract

Fast adaptive transmission has been recently identified as a key technology for exploiting potential system diversity and improving power-spectral efficiency in wireless communication systems. In this paper, an adaptive resource-allocation approach, which jointly adapts subcarrier allocation, power distribution, and bit distribution according to instantaneous channel conditions, is proposed for multiuser multiple-input multiple-output (MIMO)/orthogonal frequency-division multiplexing systems. The resultant scheme is able to: 1) optimize the power efficiency; 2) guarantee each user's quality of service requirements, including bit-error rate and data rate; 3) ensure fairness to all the active users; and 4) be applied to systems with various types of multiuser-detection schemes at the receiver. For practical implementation, a reduced-complexity allocation algorithm is developed. This algorithm decouples the complex multiuser joint resource-allocation problem into simple single-user optimization problems by controlling the subcarrier sharing according to the users' spatial separability. Numerical results show that significant power and diversity gains are achievable, compared with non-adaptive systems. It is also demonstrated that the MIMO system is able to multiplex several users without sacrificing antenna diversity by using the proposed algorithm.

Original languageEnglish
Pages (from-to)107-116
Number of pages10
JournalIEEE Transactions on Communications
Volume53
Issue number1
DOIs
Publication statusPublished - Jan 2005
Externally publishedYes

Fingerprint

Orthogonal frequency division multiplexing
Resource allocation
Multiuser detection
Bit error rate
Quality of service
Communication systems
Antennas

Keywords

  • Adaptive resource allocation
  • Multiple-input multiple-output (MIMO)
  • Multiuser detection (MUD)
  • Orthogonal frequency-division multiplexing (OFDM)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

Cite this

An efficient resource-allocation scheme for spatial multiuser access in MIMO/OFDM systems. / Zhang, Ying Jun; Letaief, Khaled.

In: IEEE Transactions on Communications, Vol. 53, No. 1, 01.2005, p. 107-116.

Research output: Contribution to journalArticle

@article{23bf755ff0d944558de86f36fdd48ba9,
title = "An efficient resource-allocation scheme for spatial multiuser access in MIMO/OFDM systems",
abstract = "Fast adaptive transmission has been recently identified as a key technology for exploiting potential system diversity and improving power-spectral efficiency in wireless communication systems. In this paper, an adaptive resource-allocation approach, which jointly adapts subcarrier allocation, power distribution, and bit distribution according to instantaneous channel conditions, is proposed for multiuser multiple-input multiple-output (MIMO)/orthogonal frequency-division multiplexing systems. The resultant scheme is able to: 1) optimize the power efficiency; 2) guarantee each user's quality of service requirements, including bit-error rate and data rate; 3) ensure fairness to all the active users; and 4) be applied to systems with various types of multiuser-detection schemes at the receiver. For practical implementation, a reduced-complexity allocation algorithm is developed. This algorithm decouples the complex multiuser joint resource-allocation problem into simple single-user optimization problems by controlling the subcarrier sharing according to the users' spatial separability. Numerical results show that significant power and diversity gains are achievable, compared with non-adaptive systems. It is also demonstrated that the MIMO system is able to multiplex several users without sacrificing antenna diversity by using the proposed algorithm.",
keywords = "Adaptive resource allocation, Multiple-input multiple-output (MIMO), Multiuser detection (MUD), Orthogonal frequency-division multiplexing (OFDM)",
author = "Zhang, {Ying Jun} and Khaled Letaief",
year = "2005",
month = "1",
doi = "10.1109/TCOMM.2004.840666",
language = "English",
volume = "53",
pages = "107--116",
journal = "IEEE Transactions on Communications",
issn = "0096-1965",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "1",

}

TY - JOUR

T1 - An efficient resource-allocation scheme for spatial multiuser access in MIMO/OFDM systems

AU - Zhang, Ying Jun

AU - Letaief, Khaled

PY - 2005/1

Y1 - 2005/1

N2 - Fast adaptive transmission has been recently identified as a key technology for exploiting potential system diversity and improving power-spectral efficiency in wireless communication systems. In this paper, an adaptive resource-allocation approach, which jointly adapts subcarrier allocation, power distribution, and bit distribution according to instantaneous channel conditions, is proposed for multiuser multiple-input multiple-output (MIMO)/orthogonal frequency-division multiplexing systems. The resultant scheme is able to: 1) optimize the power efficiency; 2) guarantee each user's quality of service requirements, including bit-error rate and data rate; 3) ensure fairness to all the active users; and 4) be applied to systems with various types of multiuser-detection schemes at the receiver. For practical implementation, a reduced-complexity allocation algorithm is developed. This algorithm decouples the complex multiuser joint resource-allocation problem into simple single-user optimization problems by controlling the subcarrier sharing according to the users' spatial separability. Numerical results show that significant power and diversity gains are achievable, compared with non-adaptive systems. It is also demonstrated that the MIMO system is able to multiplex several users without sacrificing antenna diversity by using the proposed algorithm.

AB - Fast adaptive transmission has been recently identified as a key technology for exploiting potential system diversity and improving power-spectral efficiency in wireless communication systems. In this paper, an adaptive resource-allocation approach, which jointly adapts subcarrier allocation, power distribution, and bit distribution according to instantaneous channel conditions, is proposed for multiuser multiple-input multiple-output (MIMO)/orthogonal frequency-division multiplexing systems. The resultant scheme is able to: 1) optimize the power efficiency; 2) guarantee each user's quality of service requirements, including bit-error rate and data rate; 3) ensure fairness to all the active users; and 4) be applied to systems with various types of multiuser-detection schemes at the receiver. For practical implementation, a reduced-complexity allocation algorithm is developed. This algorithm decouples the complex multiuser joint resource-allocation problem into simple single-user optimization problems by controlling the subcarrier sharing according to the users' spatial separability. Numerical results show that significant power and diversity gains are achievable, compared with non-adaptive systems. It is also demonstrated that the MIMO system is able to multiplex several users without sacrificing antenna diversity by using the proposed algorithm.

KW - Adaptive resource allocation

KW - Multiple-input multiple-output (MIMO)

KW - Multiuser detection (MUD)

KW - Orthogonal frequency-division multiplexing (OFDM)

UR - http://www.scopus.com/inward/record.url?scp=14044266874&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=14044266874&partnerID=8YFLogxK

U2 - 10.1109/TCOMM.2004.840666

DO - 10.1109/TCOMM.2004.840666

M3 - Article

AN - SCOPUS:14044266874

VL - 53

SP - 107

EP - 116

JO - IEEE Transactions on Communications

JF - IEEE Transactions on Communications

SN - 0096-1965

IS - 1

ER -