Browse > Article

A SCPWL Model-Based Digital Predistorter for Nonlinear High Power Amplifier Linearization  

Seo, Man-Jung (School of Electronic Engineering, Soongsil University)
Jeon, Seok-Hun (School of Electronic Engineering, Soongsil University)
Im, Sung-Bin (School of Electronic Engineering, Soongsil University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.47, no.10, 2010 , pp. 8-16 More about this Journal
Abstract
An orthogonal frequency division multiplexing (OFDM) system is a special case of multicarrier transmission, where a single data stream is transmitted over a number of lower-rate subcarriers. One of the main reasons to use OFDM is to increase robustness against frequency-selective fading or narrowband interference. However, in the radio systems the distortion introduced by high power amplifiers (HPA's) such as traveling wave tube amplifier (TWTA) considered in this paper, is also critical. Since the signal amplitude of the OFDM system is Rayleigh-distributed, the performance of the OFDM system is significantly degraded by the nonlinearity of the HPA in the OFDM transmitter. In this paper, we propose a simplicial canonical piecewise-linear (SCPWL) model based digital predistorter to compensate for nonlinear distortion introduced by an HPA in an OFDM system. Computer simulation is carried on an OFDM system under additive white Gaussian noise (AWGN) channels with 16-QAM and 64-QAM modulation schemes and modulator/demodulator implemented with 1024-point FFT/IFFT. The simulation results demonstrate that the proposed predistorter achieves significant performance improvement by effectively compensating for the nonlinearity introduced by the HPA.
Keywords
OFDM; HPA; DPD; SCPWL; nonlinearity;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 J. N. Lin and R. Unbehauen, "Adaptive nonlinear digital filter with canonical piecewise-linear structure," IEEE Trans. Circuits Syst., vol. 37, pp. 347-353, 1990.   DOI   ScienceOn
2 M. Ghaderi, "Adaptive predistortion lineariser using polynomial functions," IEEE Proc. Commun., vol. 141, no. 2, pp. 49-55, Apr. 1994.   DOI   ScienceOn
3 S. C. Thompson, J. G. Proakis, and J. R. Zeidler, "The Effectiveness of Signal Clipping for PAPR and Total Degradation Reduction in OFDM Systems," IEEE Globecom 2005, vol. 5, pp. 2807-2811, Nov. 2005.
4 H. A. Al-Asady and M. Ibnkahla, "Performance evaluation and total degradation of 16-QAM modulations over satellite channels," IEEE CCECE 2004, vol. 2, pp. 1187-1190, May 2004.
5 한창식, 서만중, 임성빈, "OFDM 시스템에서 시간 및 주파수 영역 클리핑의 Total Degradation 성능 평가," 대한전자공학회논문지, 제44권, 제7호, 17-22쪽. 2007년 7월.   과학기술학회마을
6 L. O. Chua and R. Ying, "Canonical Piecewise-Linear Analysis," IEEE Trans. Circuits Syst., vol. CAS-30, no. 3, pp. 125-140, Mar. 1983.
7 L. O. Chua and A. C. Deng, "Canonical Piecewise-Linear Modeling," IEEE Trans. Circuits Syst., vol. CAS-33, no. 5, pp. 511-525, May 1986.
8 C. Kahlert and L. O. Chua, "A Generalized Canonical Piecewise-Linear Representation," IEEE Trans. Circuits Syst., vol. 37, no. 3, pp. 373-383, Mar. 1990.   DOI   ScienceOn
9 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, Sep. 2000.   DOI   ScienceOn
10 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
11 A. N. D'Andrea, V. Lottici, and R. Reggiannini, "Efficient digital predistortion in radio realy links with nonlinear power amplifiers," IEE Proc. Commun., vol. 147, no. 3, pp. 175-179, Jun. 2000.   DOI   ScienceOn
12 D. R. Morgan, Z. Ma, J. Kim, M. G. Zierdt, and J. Pastalan, "A Generalized Memory Polynomial Model for Digital Predistortion of RF Power Amplifiers," IEEE Trans. Signal Process., vol. 54, no. 10, pp. 3852-3860, Oct. 2006.   DOI
13 P. Julian, A. Desages, and O.Agamennoni, "High level canonical piecewise linear representation using a simplicial partition," IEEE Trans. Circuits and Systems Part I, vol. 46, pp. 463-480, Apr. 1999.   DOI   ScienceOn
14 J. L. Figueroa, J. E. Cousseau, and R. J. P. de Figueiredo, "A low complexity simplicial canonical piece-wise linear adaptive filter," Circ., Syst., Signal Process. J., vol. 23, pp. 365-386, Oct. 2004.   DOI   ScienceOn
15 A. A. M. Saleh, "Frequency independent and frequency dependent nonlinear model of TWT amplifier," IEEE Trans. Commun., vol. 29, no. 11, pp. 1715-1721, Nov. 1981.   DOI   ScienceOn
16 S. C. Cripps, RF Power Amplifiers for Wireless Communications, Northwood, MA: Artech House, 1999.
17 Ramjee Prasad, OFDM for Wireless Communications Systems, Artech House, 2004.
18 L. J. Cimini, "Analysis and simulation of a digital mobile channel using orthogonal frequency division multiplexing," IEEE Trans. Commun., vol. 33, no. 7, pp. 665-675, Jul. 1985.   DOI