Joint estimation and compensation of frequency, DC-offset, I-Q imbalance and channel in MIMO receivers

Abstract

Direct-conversion is a low-cost RF architecture that requires fewer external components in chip implementation. It introduces, however, extra RF impairments such as I-Q imbalance and DC-offset that degrade severely the receiver performance if left uncompensated. In this paper, a new method of joint estimation and compensation of frequency, DC-offset, I-Q imbalance and channel is developed for MIMO receivers. Numerical results show that the proposed method has a very good performance; less than 2 dB loss is observed at bit-error rate 10<sup>&#x2212;4</sup>, as compared to the ideal receiver. In addition, a new training sequence along with a low-complexity architecture is proposed to reduce largely the receiver complexity with negligible performance loss.

DOI: 10.1109/ICASSP.2009.4960138

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Cite this paper

@article{Hsu2009JointEA, title={Joint estimation and compensation of frequency, DC-offset, I-Q imbalance and channel in MIMO receivers}, author={Chen-Jiu Hsu and Wern-Ho Sheen and Racy Cheng}, journal={2009 IEEE International Conference on Acoustics, Speech and Signal Processing}, year={2009}, pages={2533-2536} }