Browse > Article

An Adaptive Companding Scheme for Effective PAPR Reduction of OFDM Signals  

Kim, Jae-Woon (숭실대학교 정보통신전자공학부 통신 및 정보처리연구실)
Shin, Yo-An (숭실대학교 정보통신전자공학부 통신 및 정보처리연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.11C, 2009 , pp. 1067-1075 More about this Journal
Abstract
In this paper, we propose an adaptive companding scheme to effectively reduce PAPR (Peak-to-Average Power Ratio) of the OFDM (Orthogonal Frequency Division Multiplexing) signals, while considering both complexity and BER (Bit Error Rate) performance of systems. The proposed scheme adaptively alters the compression function in the transmitter and the expanding function in the receiver to simultaneously take into account the BER performance and the PAPR reduction. In this paper, we also measure in-band and out-of-band spectra of the proposed scheme, and observe the BER performance after applying the filtering to reduce the out-of-band radiation. As compared to the conventional companding algorithm, simulation results reveal that the proposed scheme achieves more reliable BER performance in all the cases of with and without the filtering, and has a good spectrum characteristic with effective PAPR reduction.
Keywords
OFDM; PAPR; Companding; HPA; Filtering;
Citations & Related Records
연도 인용수 순위
  • Reference
1 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
2 L. Hanzo, M. Munster, B. J. Choi, and T. Keller, OFDM and MC-CDMA for Broadband Multi-user Communications, WLANs and Broadcasting, John Wiley & Sons, 2003
3 X. Wang, T. T. Tjhung, and C. S. Ng, 'Reduction of peak-to-average power ratio of OFDM system using a companding technique,' IEEE Trans. on Broadcasting, vol. 45, no. 3, pp. 303-307, Sept. 1999   DOI   ScienceOn
4 T. Jiang and G. Zhu, 'Nonlinear companding transform for reducing peak-to-average power ratio of OFDM signals,' IEEE Trans. Broadcasting, vol. 50, no. 3, pp. 342-246, Sept. 2004   DOI   ScienceOn
5 A. Ruiz, J. M. 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
6 T. W. Parks and C. S. Burrus, Digital Filter Design, Ch. 3, John Wiley & Sons, 1987
7 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
8 P. Z. Peebles, Jr., Probability, Random Variables, and Random Signal Principles, Ch. 3, 4th Ed., McGraw-Hill, 2001
9 P. van Nee and R. Prasad, OFDM for Wireless Multimedia Communications, Artech House Publishers, 2000