Skip to main content
  • Research Article
  • Open access
  • Published:

Power Efficiency Improvements through Peak-to-Average Power Ratio Reduction and Power Amplifier Linearization


Many modern communication signal formats, such as orthogonal frequency-division multiplexing (OFDM) and code-division multiple access (CDMA), have high peak-to-average power ratios (PARs). A signal with a high PAR not only is vulnerable in the presence of nonlinear components such as power amplifiers (PAs), but also leads to low transmission power efficiency. Selected mapping (SLM) and clipping are well-known PAR reduction techniques. We propose to combine SLM with threshold clipping and digital baseband predistortion to improve the overall efficiency of the transmission system. Testbed experiments demonstrate the effectiveness of the proposed approach.


  1. Triolo AA: Advanced techniques in high-efficiency power amplification for WCDMA. NJIT ECE Seminar February 24, 2003

    Google Scholar 

  2. Digitally controlled transmitters for next generation communications systems

  3. Ju SM, Leung SH: Clipping on COFDM with phase on demand. IEEE Communications Letters 2003,7(2):49-51. 10.1109/LCOMM.2002.808399

    Article  Google Scholar 

  4. Jones AE, Wilkinson TA, Barton SK: Block coding scheme for reduction of peak to mean envelope power ratio of multicarrier transmission schemes. Electronics Letters 1994,30(25):2098-2099. 10.1049/el:19941423

    Article  Google Scholar 

  5. Bäuml RW, Fischer RFH, Huber JB: Reducing the peak-to-average power ratio of multicarrier modulation by selected mapping. Electronics Letters 1996,32(22):2056-2057. 10.1049/el:19961384

    Article  Google Scholar 

  6. Ding L, Zhou GT, Morgan DR, et al.: A robust digital baseband predistorter constructed using memory polynomials. IEEE Transactions on Communications 2004,52(1):159-165. 10.1109/TCOMM.2003.822188

    Article  Google Scholar 

  7. Ryu H-G, Hoa TP, Lee KM, Kim S-W, Park J-S: Improvement of power efficiency of HPA by the PARR reduction and predistortion. IEEE Transactions on Consumer Electronics 2004,50(1):119-124. 10.1109/TCE.2004.1277850

    Article  Google Scholar 

  8. Sperlich R, Park Y, Copeland G, Kenney JS: Power amplifier linearization with digital pre-distortion and crest factor reduction. Proceedings of IEEE MTT-S International Microwave Symposium Digest, June 2004, Fort Worth, Tex, USA 2: 669–672.

    Google Scholar 

  9. Tellado J: Multicarrier Modulation with Low PAR—Applications to DSL and Wireless. Kluwer Academic, Dordrecht, The Netherlands; 2000.

    Google Scholar 

  10. Cripps SC: RF Power Amplifiers for Wireless Communications. Artech House, Boston, Mass, USA; 1999.

    Google Scholar 

  11. Jayalath ADS, Tellambura C: Adaptive PTS approach for reduction of peak-to-average power ratio of OFDM signal. Electronics Letters 2000,36(14):1226-1228. 10.1049/el:20000881

    Article  Google Scholar 

  12. Wei S, Goeckel DL, Kelly PA: The complex envelope of bandlimited OFDM signals is asymptotically Gaussian: proof and application.

  13. Zhou GT, Peng L: Optimality condition for selected mapping in OFDM. IEEE Transactions on Signal Processing 2006,54(8):3159-3165.

    Article  Google Scholar 

  14. Chen N, Zhou GT: Distortionless crest factor reduction for forward link CDMA. Proceedings of the 6th IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC '05), June 2005, New York, NY, USA 294–297.

    Google Scholar 

  15. Ochiai H: Performance analysis of peak power and band-limited OFDM system with linear scaling. IEEE Transactions on Wireless Communications 2003,2(5):1055-1065. 10.1109/TWC.2003.816794

    Article  Google Scholar 

  16. Qian H, Xiao C, Chen N, Zhou GT: Dynamic selected mapping for OFDM. Proceedings IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP '05), March 2005, Philadelphia, Pa, USA 4: 325–328.

    Google Scholar 

Download references

Author information

Authors and Affiliations


Corresponding author

Correspondence to Ning Chen.

Rights and permissions

Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Reprints and permissions

About this article

Cite this article

Chen, N., Zhou, G.T. & Qian, H. Power Efficiency Improvements through Peak-to-Average Power Ratio Reduction and Power Amplifier Linearization. EURASIP J. Adv. Signal Process. 2007, 020463 (2007).

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • DOI: