Compensation of I/Q impairments and nonlinear distortion in MIMO wireless transmitters

Author

Saffar, D. ; Boulejfen, Noureddine ; Ghannouchi, F. ; Helaoui, M. Mohamed ; Gharssalah, A.

Author_Institution

Phys. Dept., Fac. des Sci. de Tunis, El-Manar, Tunisia

fYear

2013

fDate

16-19 June 2013

Firstpage

1

Lastpage

4

Abstract

In this paper, a joint predistorter based on the multi-variable memory polynomial (MP) model is proposed to compensate for the modulator in-phase/quadrature (I/Q) imbalance, the power amplifier (PA) nonlinearity and the crosstalk induced by the interference between the different paths in MIMO radio systems simultaneously. The proposed algorithm was experimentally validated and compared to the crossover predistorter and its performance was evaluated for 2×2 MIMO transmitter with -30 dB nonlinear crosstalk and for unbalanced modulator. The proposed predistorter shows an improvement around 25 dBc over the uncompensated output.

Keywords

MIMO communication; crosstalk; power amplifiers; radio transmitters; I-Q impairments; MIMO wireless transmitters; MP model; PA nonlinearity; crossover predistorter; crosstalk; joint predistorter; modulator in-phase-quadrature imbalance; multiple input multiple output radio systems; multivariable memory polynomial model; nonlinear crosstalk; nonlinear distortion; power amplifier nonlinearity; unbalanced modulator; Crosstalk; MIMO; Modulation; Polynomials; Power amplifiers; Radio frequency; Transmitters; I/Q imbalance; MIMO; RF crosstalk; digital predistortion; modulator; power amplifier;

fLanguage

English

Publisher

ieee

Conference_Titel

New Circuits and Systems Conference (NEWCAS), 2013 IEEE 11th International

Conference_Location

Paris

Print_ISBN

978-1-4799-0618-5

Type

conf

DOI

10.1109/NEWCAS.2013.6573627

Filename

6573627