Iterative frequency-domain soft interference cancellation for multicode DS- and MC-CDMA transmissions and performance comparison

Koichi Ishihara, Kazuaki Takeda, Fumiyuki Adachi

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Frequency-domain equalization (FDE) based on the minimum mean square error (MMSE) criterion can significantly improve the BER performance of DS- and MC-CDMA systems in a severe frequency-selective fading channel. However, since the frequency-distorted signal cannot be completely equalized, the residual inter-code interference (ICI) limits the BER performance improvement. 4G systems must support much higher variable rate data services. Orthogonal multicode transmission technique has flexibility in offering variable rate services. However, the BER performance degrades as the number of parallel codes increases. In this paper, we propose an iterative frequency-domain soft interference cancellation (IFDSIC) scheme for multicode DS- and MC-CDMA systems and their achievable BER performances are evaluated by computer simulation.

Original languageEnglish
Pages (from-to)3344-3355
Number of pages12
JournalIEICE Transactions on Communications
VolumeE89-B
Issue number12
DOIs
Publication statusPublished - 2006 Dec

Keywords

  • DS-CDMA
  • Frequency-domain equalization (FDE)
  • Interference cancelation
  • MC-CDMA
  • Multicode

ASJC Scopus subject areas

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

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