Turbo equalized double window cancellation and combining robust to large delay spread channel

Junhwan Lee, Tomoaki Ohtsuki, Masao Nakagawa

Research output: Contribution to journalArticlepeer-review


In orthogonal frequency division multiplexing (OFDM) the multipath exceeding the guard interval (GI) causes inter-symbol interference (ISI) and inter-carrier interference (ICI), thereby making it difficult to achieve high data rate transmission. In this paper, the double window cancellation and combining (DWCC), introduced in [14], is analyzed by investigating SINR distribution under different delay spread channels. The analysis indicates that the extension of processing window in iterative cancellation can have an adverse effect on the performance for small interference levels. In addition, the optimal combining of DWCC and turbo equalization (TE), named TE-DWCC, is investigated by varying the iterative cancellation procedure between DWCC and channel decoder and the decision feedback type such as hard decision feedback (HDF) or soft decision feedback (SDF). Finally, by changing interference level, code rate, and decision feedback type, the performance of TE-DWCC is compared with the conventional canceller that adopts turbo equalization in the exponentially distributed slow fading channel.

Original languageEnglish
Pages (from-to)517-526
Number of pages10
JournalIEICE Transactions on Communications
Issue number2
Publication statusPublished - 2009 Feb


  • DWCC
  • HDF
  • ICI
  • ISI
  • OFDM
  • SDF
  • TE

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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