Estimation and compensation of frequency selective TX/RX/ IQ imbalance in MIMO OFDM systems

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    Abstract

    The influence, digital estimation and compensation of IQ mismatch at both transmitter (TX) and receiver (RX) side of a direct-conversion based multiple antenna OFDM system are presented in this paper. The resulting IQ imbalance can be split into a frequency independent and a frequency selective part. For estimation and compensation a two-step approach is presented, combining a data-aided and decision directed approach. First the frequency independent IQ imbalance is estimated using a preamble and, subsequently, the frequency selective IQ imbalance is removed using adaptive filtering. A numerical performance analysis reveals that the presented approach effectively mitigates the influence of IQ mismatch in OFDM-based space division multiplexing systems experiencing both TX and RX IQ imbalance.
    Original languageEnglish
    Title of host publicationProceedings IEEE International Conference on Communications (ICC 2006), June 11-15, 2006, Istanbul, Turkey
    PublisherInstitute of Electrical and Electronics Engineers
    Publication statusPublished - 2006
    Event2006 IEEE International Conference on Communications (ICC 2006) - Istanbul, Turkey
    Duration: 11 Jun 200615 Jun 2006

    Conference

    Conference2006 IEEE International Conference on Communications (ICC 2006)
    Abbreviated titleICC 2006
    CountryTurkey
    CityIstanbul
    Period11/06/0615/06/06

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  • Cite this

    Schenk, T. C. W., Smulders, P. F. M., & Fledderus, E. (2006). Estimation and compensation of frequency selective TX/RX/ IQ imbalance in MIMO OFDM systems. In Proceedings IEEE International Conference on Communications (ICC 2006), June 11-15, 2006, Istanbul, Turkey Institute of Electrical and Electronics Engineers.