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A novel adaptive calibration scheme for frequency-selective I/Q imbalance in broadband direct-conversion transmitters

 
: Luo, J.; Kortke, A.; Keusgen, W.; Valkama, M.

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IEEE transactions on circuits and systems. 2, Express briefs 60 (2013), No.2, pp.61-65
ISSN: 1057-7130
ISSN: 1549-7747
Bundesministerium für Wirtschaft und Technologie BMWi
01MT07007
English
Journal Article
Fraunhofer HHI ()

Abstract
This brief proposes a novel adaptive calibration scheme for frequency-selective I/Q imbalance in broadband direct-conversion transmitters (Tx) with multiband multistandard capability. The calibration consists of pilot-based initial calibration, followed by pilot-free parameter tracking against time-variant characteristics. Compared to the state-of-the-art (SoA) schemes, the proposed scheme has much lower complexity. Furthermore, the pilot-free tracking can provide good performance independently from the communication signal characteristic and avoids the ill-conditioned matrix problem in the SoA schemes. Its performance is verified by both computer simulations and hardware-in-the-loop experiments.

: http://publica.fraunhofer.de/documents/N-241936.html