Low-complexity ICI suppression methods utilizing cyclic prefix for OFDM systems in high-mobility fading channels

Chun Ying Ma, Sheng Wen Liu, Chia-Chi Huang

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

This paper focuses on a simple intercarrier interference (ICI) suppression scheme that linearly combines the intersymbol interference (ISI)-free part of a cyclic prefix (CP) and its corresponding part in an orthogonal frequency-division multiplexing (OFDM) signal to soothe the ICI effect caused by a time-varying channel. In contrast with existing heuristic combining weights in the literature for ICI suppression, we derived three sets of optimum combining weights in different aspects. Through simulations, we show that the proposed combining weights outperform other existing heuristic combining weights. In addition, a simplified implementation is introduced to reduce the computational complexity of combining. Furthermore, the proposed methods can be incorporated with other ICI mitigation methods to further improve the system performance.

Original languageEnglish
Article number6578573
Pages (from-to)718-730
Number of pages13
JournalIEEE Transactions on Vehicular Technology
Volume63
Issue number2
DOIs
StatePublished - 1 Jan 2014

Keywords

  • Cyclic prefix (CP) combining
  • cyclic prefix (CP) recycling
  • high mobility
  • intercarrier interference (ICI) suppression
  • low-complexity ICI mitigation method
  • orthogonal frequency-division multiplexing (OFDM)
  • sliding window

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