Throughput performance of low complexity MIMO extensions to OFDM-based WLANs

Matthew R. McKay*, Iain B. Collings

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

3 Citations (Scopus)

Abstract

This paper considers two low complexity MIMO extensions for OFDM-based wireless local area networks (WLANs). The first is a spatial multiplexing (SM) approach employing a linear zero forcing (ZF) receiver; the second is based on space-time block codes (STBC). The throughput performance is demonstrated within the context of IEEE 802.11 a. Low complexity channel estimation is employed using orthogonal STBC training matrices. We show that at low SNRs the STBC approach yields the best performance, whereas for higher SNRs, and for channels exhibiting significant delay spread, the SM-ZF scheme offers the better solution. Furthermore, the SM-ZF scheme is shown to perform close to SM-ML. Based on the results, a low complexity hybrid scheme is proposed which switches between SM-ZF and STBC to achieve high throughputs over the entire range of SNRs.

Original languageEnglish
Title of host publicationProceedings of the 2004 IEEE International Symposium on Spread Spectrum Techniques and Applications, ISSSTA 2004
Place of PublicationNew York
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages439-443
Number of pages5
ISBN (Print)0780384083
Publication statusPublished - 2004
Externally publishedYes
Event2004 IEEE International Symposium on Spread Spectrum Techniques and Applications, ISSSTA 2004 - Sydney, Australia
Duration: 30 Aug 20042 Sep 2004

Other

Other2004 IEEE International Symposium on Spread Spectrum Techniques and Applications, ISSSTA 2004
CountryAustralia
CitySydney
Period30/08/042/09/04

Keywords

  • BICM
  • MIMO
  • OFDM
  • WLAN
  • ZF

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