I/Q Imbalance Compensation Using a Nonlinear Modeling Approach
Artikel i vetenskaplig tidskrift, 2009

In-phase/quadrature (I/Q) imbalance is one of the main sources of distortion in RF modulators. In this paper, a dual-input nonlinear model based on a real-valued Volterra series is proposed for compensation of the nonlinear frequency-dependent I/Q imbalance. First, different sources of distortion are identified from experimental measurements, then a dual-input nonlinear I/Q imbalance model is developed. Further, the inverse model is used for I/Q imbalance compensation. Finally, the performance of the I/Q imbalance compensator is evaluated with both simulations and experiments. In comparison with previously published results, the proposed I/Q imbalance compensator shows significantly improved performance. Thus, we prove that a complete nonlinear I/Q imbalance compensation can minimize the effects of the RF modulator in high-performance digital communication systems.

modulator

nonlinearity

measurement system

Volterra series.

I/Q imbalance

Författare

Haiying Cao

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Gigahertzcentrum

Ali Soltani Tehrani

Gigahertzcentrum

Chalmers, Signaler och system, Kommunikations- och antennsystem, Kommunikationssystem

Christian Fager

Gigahertzcentrum

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Thomas Eriksson

Gigahertzcentrum

Chalmers, Signaler och system, Kommunikations- och antennsystem, Kommunikationssystem

Herbert Zirath

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Gigahertzcentrum

IEEE Transactions on Microwave Theory and Techniques

0018-9480 (ISSN)

Vol. 57 3 513-518

Ämneskategorier

Annan elektroteknik och elektronik

DOI

10.1109/TMTT.2008.2012305

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Skapat

2017-10-07