Frequency offset estimation scheme in the presence of time-varying DC offset and IQ imbalance for OFDM direct conversion receivers

Mamiko Inamori, Anas M. Bostamam, Yukitoshi Sanada, Hideki Minami

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

    9 Citations (Scopus)

    Abstract

    In WLAN systems, direct conversion architecture has been implemented. Though this architecture reduces the cost and power consumption, it may suffer from DC offset, frequency offset, and IQ imbalance. This paper presents a frequency offset estimation scheme for OFDM direct conversion receivers. In this paper, a frequency offset estimation scheme in the presence of time-varying DC offset and IQ imbalance is proposed. The novelty of this scheme is in its usage of a differential filter to reduce DC offset. Evaluation of the presented estimation scheme was carried out on an OFDM communication system designed to the specifications of the IEEE 802.11a/g standard for WLANs. Numerical results through computer simulation show that the proposed frequency offset estimation scheme works well even with large DC offset and IQ imbalance.

    Original languageEnglish
    Title of host publication18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07
    DOIs
    Publication statusPublished - 2007 Dec 1
    Event18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07 - Athens, Greece
    Duration: 2007 Sep 32007 Sep 7

    Publication series

    NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC

    Other

    Other18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07
    CountryGreece
    CityAthens
    Period07/9/307/9/7

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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  • Cite this

    Inamori, M., Bostamam, A. M., Sanada, Y., & Minami, H. (2007). Frequency offset estimation scheme in the presence of time-varying DC offset and IQ imbalance for OFDM direct conversion receivers. In 18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07 [4394308] (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC). https://doi.org/10.1109/PIMRC.2007.4394308