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

GigaHertz Centrum

Ali Soltani Tehrani

GigaHertz Centrum

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Christian Fager

GigaHertz Centrum

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Thomas Eriksson

GigaHertz Centrum

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Herbert Zirath

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

GigaHertz Centrum

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