Basis expansion models and diversity techniques for blind identification and equalization of time-varying channels

Georgios B. Giannakis, Cihan Tepedelenlioǧlu

Research output: Contribution to journalArticle

487 Scopus citations


The time-varying impulse response of rapidly fading mobile communication channels is expanded over a basis of complex exponentials that arise due to Doppler effects encountered with multipath propagation. Blind methods are reviewed for estimating the bases' parameters and the model orders. Existing second-order methods are critiqued and novel algorithms are developed for blind identification, direct, zero-forcing equalization and minimum mean square error (MMSE) equalization by combining channel diversity with temporal (fractional sampling) and/or spatial diversity which becomes available with multiple receivers. Illustrative simulations are also presented.

Original languageEnglish (US)
Pages (from-to)1969-1986
Number of pages18
JournalProceedings of the IEEE
Issue number10
StatePublished - Jan 1 1998



  • Adaptive equalizers
  • Diversity methods
  • Doppler effect
  • Fading channels
  • Identification
  • Least mean square methods
  • Mobile communication
  • Time-varying channels

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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