A narrow-band power amplifier with adaptive predistorter and negative feed-back

Yitao Zhang, Osamu Muta, Yoshihiko Akaiwa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

As a method to compensate for the nonlinear distortion of a power amplifier, the adaptive predistorter and the negative feed-back system are known. Although the feed-back method is a simple technique, its instability becomes a problem for a high feedback gain to achieve a high compensation effect. On the other hand, the predistorter needs long time to calculate the suitable parameters. In this paper, we propose a nonlinear distortion compensation method for a narrow-band signal. In this method, adaptive predistorter and negative feedback are combined. In addition, to shorten the convergence time to minimize non-linear distortion, a variable step-size (VS) method is also applied to the algorithm to find the parameters of adaptive predistorter. With computer simulations, we show that the proposed scheme achieves both five times faster convergence speed than that of the predistorter and three times higher permissible delay time in the feed-back amplifier than that of a negative feed-back only amplifier, even when the VS algorithm is employed in both the conventional and the proposed systems.

Original languageEnglish
Title of host publicationGMC'2006: 2006 Global Mobile Congress - Papers
Pages22-27
Number of pages6
Volume2006
Publication statusPublished - 2006
EventGMC'2006: 2006 Global Mobile Congress - Beijing, China
Duration: Oct 9 2006Oct 11 2006

Other

OtherGMC'2006: 2006 Global Mobile Congress
CountryChina
CityBeijing
Period10/9/0610/11/06

Fingerprint

Power amplifiers
Nonlinear distortion
Feedback
Feedback amplifiers
Time delay
Computer simulation
Compensation and Redress

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Zhang, Y., Muta, O., & Akaiwa, Y. (2006). A narrow-band power amplifier with adaptive predistorter and negative feed-back. In GMC'2006: 2006 Global Mobile Congress - Papers (Vol. 2006, pp. 22-27)

A narrow-band power amplifier with adaptive predistorter and negative feed-back. / Zhang, Yitao; Muta, Osamu; Akaiwa, Yoshihiko.

GMC'2006: 2006 Global Mobile Congress - Papers. Vol. 2006 2006. p. 22-27.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Zhang, Y, Muta, O & Akaiwa, Y 2006, A narrow-band power amplifier with adaptive predistorter and negative feed-back. in GMC'2006: 2006 Global Mobile Congress - Papers. vol. 2006, pp. 22-27, GMC'2006: 2006 Global Mobile Congress, Beijing, China, 10/9/06.
Zhang Y, Muta O, Akaiwa Y. A narrow-band power amplifier with adaptive predistorter and negative feed-back. In GMC'2006: 2006 Global Mobile Congress - Papers. Vol. 2006. 2006. p. 22-27
Zhang, Yitao ; Muta, Osamu ; Akaiwa, Yoshihiko. / A narrow-band power amplifier with adaptive predistorter and negative feed-back. GMC'2006: 2006 Global Mobile Congress - Papers. Vol. 2006 2006. pp. 22-27
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