Performance improvement by frequency-domain interleaving for OFDM/TDM using MMSE-FDE in a wireless channel

Haris Gacanin, Fumiyuki Adachi

    Research output: Contribution to journalArticlepeer-review

    1 Citation (Scopus)

    Abstract

    The use of frequency-domain interleaving on a frame-byframe basis for orthogonal frequency division multiplexing (OFDM) combined with time division multiplexing (OFDM/TDM) is presented. In conventional OFDM, FDE is not designed to exploit the channel frequencyselectivity and consequently, the frequency diversity gain cannot be obtained. To further improve the bit error rate (BER) performance of conventional OFDM an interleaving technique may be applied, but FDE cannot be fully exploited. In this letter, the OFDM/TDM signal (i.e., several concatenated OFDM signals) frequency components are interleaved at the transmitter and then, minimum mean square error frequency-domain equalization (MMSE-FDE) is applied at the receiver to obtain a larger frequency diversity gain. It is shown that frequency-domain interleaving on a frame-by-frame basis for OFDM/TDM using MMSE-FDE achieves improved BER performance in comparison with conventional OFDM due to enhanced frequency diversity gain.

    Original languageEnglish
    Pages (from-to)1813-1817
    Number of pages5
    JournalIEICE Transactions on Communications
    VolumeE92-B
    Issue number5
    DOIs
    Publication statusPublished - 2009 May

    Keywords

    • Channel frequency-selectivity
    • Frequency-domain interleaving
    • MMSE-FDE
    • OFDM/TDM

    ASJC Scopus subject areas

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

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