Performance comparison of training sequences for power amplifier linearization systems

Author

Aladren, Leticia ; Garcia, Paloma ; De Mingo, Jesus ; Carro, Pedro Luis ; Sanchez-Perez, Cesar

Author_Institution

Dept. of Electron. Eng. & Commun., Univ. of Zaragoza, Zaragoza, Spain

fYear

2011

fDate

6-9 Nov. 2011

Firstpage

6

Lastpage

10

Abstract

The suitable design of a calibration signal for power amplifier (PA) behavioral modeling and digital predistortion design is addressed in this work. The proposed alternatives are a manageable triangular chirp-like waveform or a multisine-type sequence that resembles as much as possible to the transmitted signal. In this research, multisines are generated accordingly to the statistical characteristics of the transmitted signal, whereas chirp sequence is defined by the system transmission parameters. Laboratory tests show that, in spite of the remarkable existing similarities between the transmitted signal and the multisines, the chirp sequence accomplishes the same enhancement in nonlinear distortion reduction than the multisines (up to 16 dB) while reducing the training time needed for computing the predistorter coefficients.

Keywords

calibration; linearisation techniques; nonlinear distortion; power amplifiers; behavioral modeling; calibration signal; chirp sequence; digital predistortion design; multisine-type sequence; nonlinear distortion; performance comparison; power amplifier linearization systems; predistorter coefficients; training sequences; Calibration; Chirp; Nonlinear distortion; OFDM; Probability density function; Radio frequency; Training; Calibration signal; digital baseband predistorter; linearization; memory polynomial model; multisines; power amplifers (PAs);

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communication Systems (ISWCS), 2011 8th International Symposium on

Conference_Location

Aachen

ISSN

2154-0217

Print_ISBN

978-1-61284-403-9

Electronic_ISBN

2154-0217

Type

conf

DOI

10.1109/ISWCS.2011.6125299

Filename

6125299