A low complexity multi-carrier BLAST architecture for realizing high data rates over dispersive fading channels

N. Boubaker, K. B. Letaief, R. D. Murch

Research output: Contribution to journalConference article

27 Citations (Scopus)

Abstract

Space division multiplexing (SDM) is a promising technique for significantly increasing the bandwidth efficiency and wireless transmission capacity. Vertical Bell Laboratories Layered Space-Time (V-BLAST) is a scheme which exploits the rich scattered wireless channel by using multiple transmit and receive antennas. In order to make V-BLAST more robust against the detrimental effects of frequency selective and time varying channels, we combine V-BLAST with Orthogonal Frequency Division Multiplexing (OFDM) transmission and Reed-Solomon coding. Owing to the required intensive computation involved, we propose a low complexity multicarrier V-BLAST based on the use of a subcarrier grouping, an innovative sub-optimal decoding ordering procedure, and the Gram-Schmitt Orthogonalization (GSO) procedure instead of the pseudo-inverse operation used in V-BLAST. It is shown that the proposed system can greatly reduce the computational complexity required with a minimal penalty in performance compared with the exhaustive multicarrier V-BLAST.

Original languageEnglish
Pages (from-to)800-804
Number of pages5
JournalIEEE Vehicular Technology Conference
Volume2
Issue number53ND
Publication statusPublished - 1 Jan 2001
EventIEEE VTS 53rd Vehicular Technology Conference (VTS SPRING 2001) - Rhodes, Greece
Duration: 6 May 20019 May 2001

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ASJC Scopus subject areas

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

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