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A. Rezola, J. F Sevillano, D. Del Río, I. Guruceaga, R. Berenguer, I. Vélez.Frequency-Selective IQ Imbalance in Zero-Second-IF Transceivers for Wide-Band mmW Links. International Journal of Communication, Volume 5, 2015, Pages: 98-104.


This article deals with the analysis and mitigation of one of the most prominent impairments found in wideband zerosecond- IF transceivers, namely frequency-selective IQ imbalance.IQ imbalance can significantly reduce the performance of a communication system if it is not appropriately compensated. This article presents a mathematical analysis, followed by a compensation technique. Compensation processing, known as predistortion, takes place at the digital baseband and it is based on test tones and spectral measurements. The compensation strategy facilitates automatic IQ imbalance compensation procedure and it requires a minimum of extra hardware. The performance of the algorithm is evaluated in a transceiver with 64-QAM modulation and 1GHz of bandwidth implemented with real hardware. The results presented in the article suggest that the use of this technique is able to mitigate the impact of the IQ imbalance effects in wideband systems.




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  • Project acronym

  • Project title
    Energy Efficient E-band transceiver for backhaul of the future networks

  • Project reference

  • Project coordinator
    CEIT (Spain)

  • Start date: 01/12/2012
    End date: 30/11/2015

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