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Joint Calibration of Frequency Selective Time Variant I/Q-Imbalance and Modulator DC-Offset Error in Broadband Direct-Conversion Transmitters
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Recently, much attention has been paid to frequency selective I/Q-imbalance, which can seriously limit the performance of broadband direct-conversion transceivers and degrade the baseband pre-linearization of the Power Amplifier in the transmitter. This paper addresses the issue of joint calibration of frequency selective I/Q-imbalance and modulator DC-offset error in the transmitter. The presented parameter estimation requires no pilot signal, making the calibration ”semi-blind” and standard-independent. The proposed digital pre-equalization is very simple. Moreover, the I/Q-imbalance is modeled as slowly time-variant and a seamless I/Q-imbalance and DC-offset error parameter tracking algorithm is developed. The effectiveness of the proposed algorithms is verified by numerical simulations.
@inproceedings{LKK09jcof,
author = "Jian Luo and Andreas Kortke and Wilhelm Keusgen",
title = "{Joint Calibration of Frequency Selective Time Variant I/Q-Imbalance and Modulator DC-Offset Error in Broadband Direct-Conversion Transmitters}",
booktitle = "{International Conference on Communications, Circuits and Systems (ICCCAS 2009)}",
address = "San Jose, USA",
month = jul,
year = "2009",
note = "accepted",
}
Zuletzt verändert: 11.06.2009 15:58
Fokusseminar 02.11.2012
