Pilot-assisted channel estimation for orthogonal multi-carrier DS-CDMA with frequency-domain equalization

Tomoyuki Shima, Hiromichi Tomeba, Fumiyuki Adachi

    Research output: Contribution to journalArticlepeer-review


    Orthogonal multi-carrier direct sequence code division multiple access (orthogonal MC DS-CDMA) is a combination of time-domain spreading and orthogonal frequency division multiplexing (OFDM). In orthogonal MC DS-CDMA, the frequency diversity gain can be obtained by applying frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion to a block of OFDM symbols and can improve the bit error rate (BER) performance in a severe frequency-selective fading channel. FDE requires an accurate estimate of the channel gain. The channel gain can be estimated by removing the pilot modulation in the frequency domain. In this paper, we propose a pilot-assisted channel estimation suitable for orthogonal MC DS-CDMA with FDE and evaluate, by computer simulation, the BER performance in a frequency-selective Rayleigh fading channel.

    Original languageEnglish
    Pages (from-to)2874-2881
    Number of pages8
    JournalIEICE Transactions on Communications
    Issue number9
    Publication statusPublished - 2009 Sep


    • Frequency-domain equalization
    • Orthogonal MC DS-CDMA
    • Pilot-assisted channel estimation

    ASJC Scopus subject areas

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


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