Adaptive frequency-domain equalization for single-carrier multiple-input multiple-output wireless transmissions

J. Coon, S. Armour, M. Beach, J. McGeehan

Research output: Contribution to journalArticle (Academic Journal)peer-review

58 Citations (Scopus)
504 Downloads (Pure)

Abstract

Channel estimation and tracking pose real problems in broadband single-carrier wireless communication systems employing multiple transmit and receive antennas. An alternative to estimating the channel is to adaptively equalize the received symbols. Several adaptive equalization solutions have been researched for systems operating in the time domain. However, these solutions tend to be computationally intensive. A low-complexity alternative is to adaptively equalize the received message in thefrequency domain. In this paper, we present an adaptive frequency-domain equalization (FDE) algorithm for implementation in single-carrier (SC) multiple-input multiple-output (MIMO) systems. Furthermore, we outline a novel method of reducing theoverhead required to train the proposed equalizer. Finally, we address the issues of complexity and training sequence design.Other computationally efficient adaptive FDE algorithms for use in SC systems employing single transmit and receive antennas,receive diversity, or space-time block codes (STBC) can be found in the literature. However, the algorithm detailed in this paper can be implemented in STBC systems as well as in broadband spatial multiplexing systems, making it suitable for use in high data rateMIMO applications.
Translated title of the contributionAdaptive frequency-domain equalization for single-carrier multiple-input multiple-output wireless transmissions
Original languageEnglish
Pages (from-to)3247 - 3256
Number of pages10
JournalIEEE Transactions on Signal Processing
Volume53
Issue number8, pt. 2
DOIs
Publication statusPublished - Aug 2005

Bibliographical note

Publisher: Institute of Electrical and Electronics Engineers (IEEE)

Keywords

  • adaptive equalization
  • multiple-input multiple-output (MIMO) systems
  • frequency-domain equalization

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