Adaptive resource allocation and capacity comparison of downlink multiuser MIMO-MC-CDMA and MIMO-OFDMA

Ernest S. Lo, Peter W C Chan, Vincent K N Lau, Roger S. Cheng, Khaled Letaief, Ross D. Murch, Wai Ho Mow

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

In this paper, we examine and compare the potential maximum sum capacity of downlink multiple-input-multiple-output orthogonal frequency division multiple access (MIMO-OFDMA) and multiple-input-multiple-output multicarrier code division multiple access (MIMO-MC-CDMA) in a single-cell multiuser environment with channel side information at the transmitter, with and without a fairness constraint. The resource allocation is formulated as a cross-layer optimization framework and optimal power allocation and user selection algorithms are proposed for both scenarios. We find that for delay-sensitive applications, where fairness is imposed, the performance gain of OFDMA over MC-CDMA is quite large at moderate path loss exponents and number of antennas. However, for delay-insensitive applications, the benefits of OFDMA over MC-CDMA are significantly reduced when the path loss exponent or the number of antennas is large.

Original languageEnglish
Pages (from-to)1083-1092
Number of pages10
JournalIEEE Transactions on Wireless Communications
Volume6
Issue number3
DOIs
Publication statusPublished - Mar 2007
Externally publishedYes

Fingerprint

Multicarrier
Frequency division multiple access
Orthogonal Frequency Division multiple Access (OFDMA)
Code Division multiple Access
MC-CDMA
Multiple-input multiple-output (MIMO)
Resource Allocation
Code division multiple access
Resource allocation
Path Loss
Fairness
Antenna
Exponent
Cross-layer Optimization
Antennas
Side Information
Power Allocation
Optimal Allocation
Transmitter
Transmitters

Keywords

  • Adaptive resource allocation
  • Cross-layer design
  • Fairness
  • MC-CDMA
  • MIMO
  • Multiuser capacity
  • Multiuser diversity
  • OFDMA

ASJC Scopus subject areas

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

Cite this

Adaptive resource allocation and capacity comparison of downlink multiuser MIMO-MC-CDMA and MIMO-OFDMA. / Lo, Ernest S.; Chan, Peter W C; Lau, Vincent K N; Cheng, Roger S.; Letaief, Khaled; Murch, Ross D.; Mow, Wai Ho.

In: IEEE Transactions on Wireless Communications, Vol. 6, No. 3, 03.2007, p. 1083-1092.

Research output: Contribution to journalArticle

Lo, Ernest S. ; Chan, Peter W C ; Lau, Vincent K N ; Cheng, Roger S. ; Letaief, Khaled ; Murch, Ross D. ; Mow, Wai Ho. / Adaptive resource allocation and capacity comparison of downlink multiuser MIMO-MC-CDMA and MIMO-OFDMA. In: IEEE Transactions on Wireless Communications. 2007 ; Vol. 6, No. 3. pp. 1083-1092.
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