Robust OFDM receivers for dispersive time-varying channels: Equalization and channel acquisition

Alexei Gorokhov, Jean Paul Linnartz

Research output: Contribution to journalArticleAcademicpeer-review

133 Citations (Scopus)

Abstract

In orthogonal frequency-division multiplexing, time variations of a multipath channel lead to a loss of orthogonality between the subcarriers, and thereby limit the achievable throughput. This paper proposes a general framework for a controlled removal of intercarrier interference (ICI) and channel acquisition. The core idea behind our method is to use a finite power series expansion for the time-varying frequency response, along with the known statistical properties of mobile radio channels. Channel acquisition and ICI removal are accomplished in the frequency domain and allow for any desired tradeoff between the residual ICI level, the required training for channel acquisition, and processing complexity. The proposed approach enables a high spectral efficiency (64-quadrature amplitude modulation mode) of digital video broadcasting-terrestrial in highly mobile environments.

Original languageEnglish
Pages (from-to)572-583
Number of pages12
JournalIEEE Transactions on Communications
Volume52
Issue number4
DOIs
Publication statusPublished - 1 Apr 2004
Externally publishedYes

Keywords

  • Digital video broadcasting (DVB)
  • Intercarrier interference (ICI)
  • Mobile communications
  • Multicarrier systems

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