Iterative overlap FDE for multicode DS-CDMA

Kazuaki Takeda, Hiromichi Tomeba, Fumiyuki Adachi

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Recently, a new frequency-domain equalization (FDE) technique, called overlap FDE, that requires no GI insertion was proposed. However, the residual inter/intra-block interference (IBI) cannot completely be removed. In addition to this, for multicode direct sequence code division multiple access (DS-CDMA), the presence of residual interchip interference (ICI) after FDE distorts orthogonality among the spreading codes. In this paper, we propose an iterative overlap FDE for multicode DS-CDMA to suppress both the residual IBI and the residual ICI. In the iterative overlap FDE, joint minimum mean square error (MMSE)-FDE and ICI cancellation is repeated a sufficient number of times. The bit error rate (BER) performance with the iterative overlap FDE is evaluated by computer simulation.

Original languageEnglish
Pages (from-to)1942-1951
Number of pages10
JournalIEICE Transactions on Communications
Issue number6
Publication statusPublished - 2008


  • ICI cancellation
  • Mmse frequency-domain equalization
  • Overlap FDE


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