CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

I/Q Imbalance Compensation Using a Nonlinear Modeling Approach

Haiying Cao (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik ; GigaHertz Centrum) ; Ali Soltani Tehrani (Institutionen för signaler och system, Kommunikationssystem ; GigaHertz Centrum) ; Christian Fager (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik ; GigaHertz Centrum) ; Thomas Eriksson (Institutionen för signaler och system, Kommunikationssystem ; GigaHertz Centrum) ; Herbert Zirath (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik ; GigaHertz Centrum)
IEEE Transactions on Microwave Theory and Techniques (0018-9480). Vol. 57 (2009), 3, p. 513-518.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: I/Q imbalance, modulator, measurement system, nonlinearity, Volterra series.



Denna post skapades 2009-01-07. Senast ändrad 2016-08-16.
CPL Pubid: 83801

 

Läs direkt!


Länk till annan sajt (kan kräva inloggning)