Iterative methods for cancellation of intercarrier interference in OFDM systems

Research output: Contribution to journalArticle

Abstract

We consider orthogonal frequency-division multiplexing systems with intercarrier interference (ICI) due to insufficient cyclic prefix and/or temporal variations. Intersymbol interference (ISI) and ICI lead to an error floor in conventional receivers. We suggest two techniques for the equalization of ICI. The first, called "operator-perturbation technique" is an iterative technique for the inversion of a linear system of equations. Alternatively, we show that serial or parallel interference cancellation can be used to drastically reduce the error floor. Simulations show that, depending on the SNR and the origin of the ICI, one of the schemes performs best. In all cases, our schemes lead to a drastic reduction of the bit error rate.

Details

Authors
  • Andreas Molisch
  • Martin Toeltsch
  • Sameer Vermani
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • orthogonal frequency-division multiplexing (OFDM), iterative algorithms, intersymbol interference (ISI), cancellation, interference, cyclic prefix (CP), intercarrier interference (ICI)
Original languageEnglish
Pages (from-to)2158-2167
JournalIEEE Transactions on Vehicular Technology
Volume56
Issue number4
Publication statusPublished - 2007
Publication categoryResearch
Peer-reviewedYes