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    An adaptive approach to mitigate the effects of I/Q imbalance and multipath channel

    Access Status
    Fulltext not available
    Authors
    Haq, K.
    Chung, Kah-Seng
    Date
    2013
    Type
    Conference Paper
    
    Metadata
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    Citation
    Haq, K. and Chung, K. 2013. An adaptive approach to mitigate the effects of I/Q imbalance and multipath channel, in Proceedings of the 19th Asia-Pacific Conference on Communications (APCC), Aug 29-31 2013, pp. 550-555. Denpasar: IEEE Computer Society.
    Source Title
    2013 19th Asia-Pacific Conference on Communications, APCC 2013
    DOI
    10.1109/APCC.2013.6766009
    ISBN
    9781467360500
    School
    Department of Electrical and Computer Engineering
    URI
    http://hdl.handle.net/20.500.11937/30564
    Collection
    • Curtin Research Publications
    Abstract

    It is well known that dual-branch receivers suffer from in-phase (I) and quadrature (Q) imbalance problems resulting in distortion and poor signal quality. This paper presents a novel technique, incorporating adaptive estimation and compensation, to mitigate the combined effects of I/Q imbalance and multipath channel on the received signal. Estimation of the channel and I/Q imbalance parameters is performed in time domain using a training sequence. Based on the estimated I/Q imbalance and channel parameters, signal compensation are performed in the frequency domain. Computer simulations have shown that the proposed scheme is effective in mitigating the combined effects of I/Q imbalance and multipath fading for QPSK and 16-QAM modulation. The Symbol Error Rate (SER) achieved for the compensated 16-QAM signal is 10-4, at an SNR of 20dB, which is the same for ideal 16-QAM signal, at an SNR of 19dB.

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