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A Robust Companding Scheme against Nonlinear Distortion of High Power Amplifiers  

Kim, Jae-Woon (숭실대학교 정보통신전자공학부 통신및정보처리 연구실)
Han, Seung-Woo (숭실대학교 정보통신전자공학부 통신및정보처리 연구실)
Shin, Yo-An (숭실대학교 정보통신전자공학부 통신및정보처리 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.11C, 2007 , pp. 1079-1086 More about this Journal
Abstract
In this paper, we propose a CCP (Companding Combined with Predistorter) scheme that maintains BER (Bit Error Rate) performance of systems, while effectively reducing PAPR (Peak-to-Average Power Ratio) of OFDM (Orthogonal Frequency Division Multiplexing) signals, independent of nonlinear property of HPAs (High Power Amplifiers). The proposed CCP scheme combines the conventional companding scheme proposed by the authors with the predistorter, in order to prevent degradation of BER performance caused by signal distortion from nonlinear property of the HPA and the compression property of the companding scheme. Hence, the proposed scheme effectively reduces the PAPR and simultaneously maintains the BER performance, independent of nonlinear property of the HPA. Simulation results showed that the proposed CCP scheme provides the lowest total degradation for all the modulations, when comparing with the companding scheme proposed by Wang and the clipping scheme.
Keywords
OFDM; PAPR; Companding; HPA; Clipping; Nonlinear Distortion;
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  • Reference
1 L. Hanzo, M. Munster, B. Choi, and T. Keller, OFDM and MC-CDMA for Broadband Multi-user Communications, WLANs and Broadcasting, John Wiley & Sons, 2003
2 J. Han and Y. Shin, 'A companding scheme for PAPR reduction in OFDM systems,' Proc. ITC-CSCC 2002, vol. 3, pp. 1909-1912, Phuket, Thailand, July 2002
3 S. Han and J. Lee, 'An overview of peak-to-average power ratio reduction techniques for multicarrier transmission,' IEEE Wireless Commun., vol. 12, no. 4, pp. 56-65, Apr. 2005   DOI
4 X. Wang, T. Yjhung, and C. Ng, 'Reduction of peak-to-average power ratio of OFDM system using a companding technique,' IEEE Trans. Broadcast., vol. 45, no. 3, pp. 303-307, Sept. 1999   DOI   ScienceOn
5 H. Ryu, J. Park, and J. Park, 'Threshold IBO of HPA in the predistorted OFDM communication system,' IEEE Trans. Broadcast., vol. 50, no. 4, pp. 425-428, Dec. 2004   DOI   ScienceOn
6 A. Mattsson, G. Mendenhall, and T. Dittmer, 'Comments on 'Reduction of peak-to-average power ratio of OFDM system using a companding technique',' IEEE Trans. Broadcast., vol. 45, no. 4, pp. 418-419, Dec. 1999   DOI   ScienceOn
7 D. Kim and G. Stuber, 'Clipping noise mitigation for OFDM by decision-aided reconstruction,' IEEE Commun. Lett., vol. 3, no. 1, pp. 3-6, Jan. 1999   DOI   ScienceOn
8 A. Ruiz, J. Cioffi, and S. Kasturia, 'Discrete multiple tone modulation with coset coding for the spectrally shaped channel,' IEEE Trans. Commun., vol. 40, no. 6, pp. 1012-1029, June 1992   DOI   ScienceOn
9 R. Prasad, OFDM for Wireless Communications Systems, Artech House Publishers, 2004
10 S. Thompson, J. Proakis, and J. Zeidler, 'The effectiveness of signal clipping for PAPR and total degradation reduction in OFDM systems,' Proc. IEEE GLOBECOM 2005, vol. 5, pp. 2807-2811, St. Louis, USA, Nov. 2005