A nonlinear distortion compensation method with adaptive predistorter and negative feed-back for a narrow-band signal

Yitao Zhang, Osamu Muta, Yoshihiko Akaiwa

研究成果: Contribution to journalArticle査読

2 被引用数 (Scopus)

抄録

The adaptive predistorter and the negative feedback system are known as methods to compensate for the nonlinear distortion of a power amplifier. Although the feedback method is a simple technique, its instability impedes the capability of high-feedback gain to achieve a highcompensation effect. On the other hand, the predistorter requires a long time for convergence of the adaptive predistorters. In this paper, we propose a nonlinear distortion compensation method for a narrow-band signal. In this method, an adaptive predistorter and negative feedback are combined. In addition, to shorten the convergence time to minimize nonlinear distortion, a variable step-size (VS) method is also applied to the algorithm to determine the parameters of the adaptive predistorter. Using 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 feedback amplifier than that of a negative feedback only amplifier.

本文言語英語
ページ(範囲)2331-2337
ページ数7
ジャーナルIEICE Transactions on Communications
E91-B
7
DOI
出版ステータス出版済み - 1 1 2008

All Science Journal Classification (ASJC) codes

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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