Modelling and equalization of rapidly fading channels

Michail K. Tsatsanis, Georgios B. Giannakis

Research output: Contribution to journalArticlepeer-review

184 Scopus citations

Abstract

Basis expansion ideas are employed in order to equalize frequency-selective, rapidly fading channels. For certain multipath fading channels (e.g. the mobile radio channel), the time variations of the coefficients can be modelled as a combination of a small number of complex exponentials, under the assumption of linearly changing path delays. Based on this observation, novel adaptive and decision feedback algorithms are derived which exploit such an explicit modelling of the channel's variations. The problem of estimating the frequencies of the exponentials is also addressed using second- and higher-order cyclic statistics. By integrating ideas from cyclostationary signal analysis, both batch and recursive methods are developed. Finally, some illustrative simulations are presented.

Original languageEnglish (US)
Pages (from-to)159-176
Number of pages18
JournalInternational Journal of Adaptive Control and Signal Processing
Volume10
Issue number2
DOIs
StatePublished - Jan 1 1996

Keywords

  • Cyclostationary signals
  • Equalization
  • Fading channels
  • Time-varying systems

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