Iterative overlap FDE for DS-CDMA without GI

Kazuaki Takeda, Hiromichi Tomeba, Fumiyuki Adachi

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    13 Citations (Scopus)


    Frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion can replace the conventional rake combining with significantly improved bit error rate (BER) performance for the downlink DS-CDMA in a frequency-selective fading channel. Recently, a new MMSE-FDE technique that requires no GI insertion has been proposed to avoid inter-block interference (IBI) (this technique is called overlap FDE). However, the residual IBI is produced and degrades the BER performance. Furthermore, the presence of an inter-chip interference (ICI) after MMSE-FDE limits the BER performance improvement. In this paper, we propose an iterative overlap FDE for DS-CDMA downlink to suppress both IBI and ICI. In the iterative overlap FDE, joint MMSE-FDE and ICI cancellation is repeated a sufficient number of times and the middle part of M chips is picked up. The BER performance with the iterative overlap FDE is evaluated by computer simulation.

    Original languageEnglish
    Title of host publication2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall
    Number of pages5
    Publication statusPublished - 2006
    Event2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall - Montreal, QC, Canada
    Duration: 2006 Sep 252006 Sep 28

    Publication series

    NameIEEE Vehicular Technology Conference
    ISSN (Print)1550-2252


    Other2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall
    CityMontreal, QC


    • DS-CDMA
    • ICI cancellation
    • Iterative overlap FDE
    • MMSE-FDE

    ASJC Scopus subject areas

    • Computer Science Applications
    • Electrical and Electronic Engineering
    • Applied Mathematics


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