American Journal of Electrical and Electronic Engineering
ISSN (Print): 2328-7365 ISSN (Online): 2328-7357 Website: http://www.sciepub.com/journal/ajeee Editor-in-chief: Naima kaabouch
Open Access
Journal Browser
Go
American Journal of Electrical and Electronic Engineering. 2014, 2(3), 72-81
DOI: 10.12691/ajeee-2-3-3
Open AccessArticle

Efficient Baseband Digital Predistorter Using Lut for Power Amplifier (PA) with Memory Effect

B. Feuvrie1, 2, M. Diop3, and Y. Wang1

1IREENA Ecole polytechnique – de l’université de Nantes, Nantes, France

2IUT GEII Nantes - Site Fleuriaye, Av. du Prof J. Rouxel, Carquefou, France

3Ecole Supérieure Polytechnique, UCAD, BP 5085, Dakar-Fann, Sénégal

Pub. Date: March 25, 2014

Cite this paper:
B. Feuvrie, M. Diop and Y. Wang. Efficient Baseband Digital Predistorter Using Lut for Power Amplifier (PA) with Memory Effect. American Journal of Electrical and Electronic Engineering. 2014; 2(3):72-81. doi: 10.12691/ajeee-2-3-3

Abstract

Modern communications systems will have to integrate multiple radio technologies to support a large number of wireless standards (WLAN, WPAN…). This system should operate with third generation (3G) air interface standards, where non constant envelope modulation formats (MQAM, OFDM…) are required. The amplification of a modulated signal with large variation of envelope introduces distortions when the input-output characteristic is nonlinear. These distortions are particularly important when the power amplifier (PA) has non-linear memory effects with a wideband signal. The technique proposed in this paper aims to fight against this phenomenon by optimizing the method developed in the laboratory for a real-time implementation. This technique is able to provide exactly the reverse characteristics of a PA modeled by a Hammerstein model in base band. Its principle is to find the largest real root of a polynomial related to the analytical model of the PA and to the input signal to be amplified to calculate a pre-distorted signal. To reduce significantly the computation time, an implementation by the LUT method is proposed. This method uses two pre-distortion principles and can be implemented on a FPGA board with table bases method known for simplicity including in the same way the correction of the memory effect.

Keywords:
nonlinear distortion with memory digital pre-distortion power amplifier (PA) Hammerstein model Look Up Table (LUT)

Creative CommonsThis work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

References:

[1]  P. B. Kenington, “High Linearity RF Amplifier Design”, Norwood, MA, USA: Artech House, Inc., 2000.
 
[2]  S. C. Cripps, “RF Power Amplifiers for Wireless Communications”, Second Edition (Artech House Microwave Library (Hardcover)), Norwood, MA, USA: Artech, House, Inc., 2006.
 
[3]  L. Sundstrom, M. Faulkner, and M. Johansson, “Quantization analysis and design of a digital predistortion linearizer for RF power amplifiers”, IEEE Transactions on Vehicular Technology, vol. 45, no. 4, pp. 707-719, Nov 1996.
 
[4]  N. Safari, J. Tanem, and T. Roste, “A block-based predistortion for high poweramplifier linearization”, IEEE Transactions on Microwave Theory and Techniques, vol. 54, no. 6, pp. 2813-2820, June 2006.
 
[5]  M. Faulkner and M. Johansson, “Adaptive linearization using predistortion experimental results”, IEEE Transactions on Vehicular Technology, vol. 43, no. 2, pp. 323-332, May 1994.
 
[6]  W.-J. Kim, S. Stapleton, J. H. Kim, and C. Edelman, “Digital predistortion linearized wireless power amplifiers”, IEEE Microwave Magazine, vol. 6, no. 3, pp. 54-61, Sept. 2005.
 
[7]  Cottais, E.; Nomm, S.; Wang, Y.; Toutain, S.; Moog, C. “Baseband adaptive predistorter to linearize power amplifiers with memory”, European Microwave Conference, Amsterdam, Netherlands, October 2004.
 
[8]  D. Morgan, Z. Ma, J. Kim, M. Zierdt, and J. Pastalan, “A generalized memory polynomial model for digital predistortion of rf power amplifiers”, IEEE Transactions on Signal Processing, vol. 54, no. 10, pp. 3852-3860, Oct. 2006.
 
[9]  T. Liu, S. Boumaiza, and F. Ghannouchi, “Augmented hammerstein predistorter for linearization of broad-band wireless transmitters”, IEEE Transactions on Microwave Theory and Techniques, vol. 54, no. 4, pp. 1340-1349, June 2006.
 
[10]  L. Ding, G. Zhou, D. Morgan, Z. Ma, J. Kenney, J. Kim, and C. Giardina, “A robust digital baseband predistorter constructed using memory polynomials”, IEEE Transactions on Communications, vol. 52, no. 1, pp. 159-165, Jan. 2004.
 
[11]  F. Gao and W. Snelgrove, “Adaptive linearization of a loudspeaker”, International Conference on Acoustics, Speech, and Signal Processing, 1991 (ICASSP1991), pp. 3589-3592 vol.5, Apr 1991.
 
[12]  C. Eun and E. Powers, “A new Volterra predistorter based on the indirect learning architecture”, IEEE Transactions on Signal Processing, vol. 45, no. 1, pp. 223-227, Jan 1997.
 
[13]  Marsalek, R.; Jardin, P. & Baudoin, G., “From post-distorsion to pre-distorsion for power amplifiers linearization”, IEEE Communications Letters, Vol. 7, pp. 308-310, 2003.
 
[14]  M. Schetzen, “The Volterra and Wiener Theories of Nonlinear Systems”, Melbourne, FL, USA: Krieger Publishing Co., Inc., 2006.
 
[15]  Y. H. Lim, Y. S. Cho, I. W. Cha, and D. H. Youn, “An adaptive nonlinear prefilter for compensation of distortion in nonlinear systems”, IEEE Transactions on Signal Processing, vol. 46, no. 6, pp. 1726-1730, Jun 1998.
 
[16]  H. W. Kang, Y. S. Cho, and D. H. Youn, “On compensating nonlinear distortions of an ofdm system using an efficient adaptive predistorter”, IEEE Transactions on Communications, vol. 47, no. 4, pp. 522-526, Apr 1999.
 
[17]  E.Cottais, “Linéarisation d’amplificateurs de puissance large bande par pré-distorsion adaptative en bande de base”, Ph.D.dissertation, Université de Nantes – France, 5 Dec 2005.
 
[18]  M. Abi Hussein, “Linéarisation des amplificateurs de puissance – Pré-distorsion numérique adaptative en bande de base”, Ph.D.dissertation, Université de Nantes – France, 3 Jun 2009.
 
[19]  R.Marsalek, “Contribution à la linéarisation des amplificateurs de puissance par prédistorsion numérique adaptative en bande de base”, Ph.D.dissertation, ESSIE NOISY LE GRAND– France, 12 Dec 2003.
 
[20]  E.Cottais, Y.Wang, S.Toutain, “A new adaptive baseband digital predistortion technique”, European Microwave Association, vol. 2, juin 2006, pp 154-159.
 
[21]  A. Saleh, “Frequency-independent and frequency-dependent nonlinear models of twt amplifiers,” Communications, IEEE Transactions on, vol. 29, no. 11, pp. 1715-1720, Nov 1981.