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    National Tsing Hua University Institutional Repository > 電機資訊學院 > 電機工程學系 > 期刊論文 >  Estimation and compensation of I/Q imbalance in OFDM direct-conversion receivers


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/72816


    Title: Estimation and compensation of I/Q imbalance in OFDM direct-conversion receivers
    Authors: K.-Y. Sung;C.-C. Chao
    教師: 趙啟超
    Date: 2009
    Publisher: Institute of Electrical and Electronics Engineers
    Relation: Selected Topics in Signal Processing, IEEE Journal of, Institute of Electrical and Electronics Engineers, Volume 3, Issue 3, June 2009, Paqges 438 - 453
    Keywords: I/Q imbalance
    OFDM
    direct-conversion
    Abstract: In this paper, we consider estimation and compensation of the I/Q imbalance generated by the direct-conversion receiver in orthogonal frequency division multiplexing (OFDM) systems. Two methods for I/Q imbalance compensation are proposed: the maximum-likelihood estimation (MLE)-based method and the least-square estimation (LSE)-based method. Computer simulations are conducted for comparisons of the performance. Effects of timing and frequency offsets on performance are also analyzed. The MLE-based method generally performs well even at low signal-to-noise ratio (SNR) and is robust against timing and frequency offsets. The LSE-based method outperforms the MLE-based method at higher SNR. Both methods are robust against different gain and phase imbalances.
    Relation Link: http://www.ieee.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/72816
    Appears in Collections:[電機工程學系] 期刊論文

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