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http://dx.doi.org/10.6109/jkiice.2007.11.12.2382

A New Polynomial Digital Predistortion Method Based on Direct Learning for Linearizing Nonlinear Power Amplifier  

Jeong, Eui-Rim (한국과학기술원)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.11, no.12, 2007 , pp. 2382-2390 More about this Journal
Abstract
A new polynomial-based predistortion method for linearizing nonlinear power amplifier is proposed. The proposed method finds the predistortion parameter directly without the help of postdistorter whereas most existing polynomial-based predistortion methods calculate the predistortion parameter indirectly from the prostdistorter. First, a new predistortion algorithm is derived based on the assumption that the characteristic of the amplifier is modeled by piecewise linear function. Then it is modified into a proposed method which does not require any assumption or prior knowledge of the amplifier. The proposed method is derived based on the RLS (recursive least squares) algorithm. The proposed technique is simpler to implement than the existing methods and the computer simulation demonstrates that the proposed method is more robust to the initial condition and the saturation region of the amplifier.
Keywords
predistortion; power amplifier; RLS; polynomial;
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1 K. J. Muhonen, M. Kavehrad and R. Krishnamoorthy, 'Look-up table techniques for adaptive digital predistortion: a development and comparison,' IEEE Trans. Veh. Technol., vol. 49, no. 5, pp. 1995-2002, Sept. 2000   DOI   ScienceOn
2 S. Haykin, Adaptive filter theory, Prentice Hall, 1996
3 L. Ding, G. T. Zhou, D. R. Morgan, Z. Ma, S. Kenney, J. Kim, and C. R. Giardina, 'A robust digital baseband predistorter constructed using memory polynomials,' IEEE Trans. Commun., vol. 52, no.1, pp. 159-165, Jan. 2004   DOI   ScienceOn
4 J. K. Cavers, 'Amplifier linearization using a digital Predistorter with fast adaptation and low memory requirements,' IEEE Trans. Veh. Technol., vol. 39, no. 4, pp. 374-382, Nov. 1990   DOI   ScienceOn
5 N. Pothecary, Feedforward linear power amplifier, Artech House, 1999
6 Y. Qian and T. Yao, 'Structure for adaptive predistortion suitable for efficient adaptive algorithm application,' Electron. Lett., vol.38, no.21, pp.1282-1283, Oct. 2002
7 D. Zhou and V.E. DeBrunner, 'Novel adaptive nonlinear predistorters based on the direct learning algorithm,' IEEE Trans. Signal Processing, vol. 55, no.1, pp.120-133, Jan.2007   DOI   ScienceOn
8 R. Marsalek, P. Jardin, and G. Baudoin, 'From post-distortion to pre-distortion for power amplifiers linearization,' IEEE Commun. Letters, vol.7, no.7, pp.308-310, July 2003   DOI   ScienceOn
9 3GPP TS 25.141 (V4.2.0), 'Base station conformance testing (FDD),' Sept. 2001. Online available at: http://www.3gpp.org/ftp/Specs/2003-12/Rel-6/25_series/25141-640.zip
10 A. N. D'Andrea, V. Lottici and R. Reggiannini, 'Efficient digital predistortion in radio relay links with nonlinear power amplifiers,' IEE Proc. Commun., vol. 147, no. 3, pp. 175-179, June 2000
11 M. Ghaderi, S. Kumar and D. E. Dodds, 'Fast adaptive polynomial I and Q Predistorter with global optimization,' IEE Proc. Commun., vol.143, no.2, pp.78-86, Apr. 1996
12 C. Eun and E. J. Powers, 'A new volterra predistorter based on the indirect learning architecture,' IEEE Trans. Signal Process., vol. 45, no. 1, pp. 223-227, Jan. 1997   DOI   ScienceOn
13 A. S. Wright and W. G. Durtler, 'Experimental performance of an adaptive digital linearized power amplifier,' IEEE Trans. Veh. Technol., vol. 41, no. 4, pp. 395-400, Nov. 1992   DOI   ScienceOn
14 A. A. M. Saleh, 'Frequency-independent and frequency-dependent nonlinear models of TWT amplifiers,' IEEE Trans. Commun., vol.COM-29, no.11, pp.1715-1720, Nov. 1981