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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/4083

Title: Blind I/Q imbalance compensation technique for direct-conversion digital radio transceivers
Authors: De Witt, JJ
Van Rooyen, GJ
Keywords: Radio communication equipment
Direct conversion transceivers
Quadrature imbalance compensation
I/Q imbalance compensation
Issue Date: May-2009
Publisher: IEEE
Citation: De Witt, JJ and Van Rooyen, GJ. 2009. Blind I/Q imbalance compensation technique for direct-conversion digital radio transceivers. IEEE Transactions on Vehicular Technology, Vol.58(4), pp 2077 - 2082
Abstract: Although the quadrature mixing radio front-end offers an attractive way to perform frequency translation, its image-rejection capability is severely affected by the gain and phase imbalances (I/Q imbalances) between its two analog signal paths. Digital signal processing techniques have widely been proposed to compensate for these mixer imperfections. Of these techniques, the class of blind compensation techniques seems very attractive since no test signals are required. This paper presents a novel I/Q imbalance extraction technique that uses a Cholesky decomposition of the received signal’s covariance matrix to extract the exact imbalances of the front-end. An analysis is also presented on extracting and separating the imbalances of a cascaded imbalanced modulator and demodulator. Both a block-based and an adaptive variant of the technique are proposed, and a performance evaluation over multipath channels is presented.
Description: Copyright: 2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
URI: 10.1109/TVT.2008.2005414
ISSN: 0018-9545
Appears in Collections:Wireless technologies
General science, engineering & technology

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