Peak-to-Average Power Ratio Reduction in OFDM Systems using Huffman Coding

In this paper we proposed the use of Huffman coding to reduce the PAR of an OFDM system as a distortionless scrambling technique, and we utilize the amount saved in the total bit rate by the Huffman coding to send the encoding table for accurate decoding at the receiver without reducing the effective throughput. We found that the use of Huffman coding reduces the PAR by about 6 dB. Also we have investigated the effect of PAR reduction due to Huffman coding through testing the spectral spreading and the inband distortion due to HPA with different IBO values. We found a complete match of our expectation from the proposed solution with the obtained simulation results.

[1] Rakesh Rajbanshi, "Peak to Average Power Ratio Reduction Techniques
Survey and Analysis", EECS 800, Dec. 2004.
[2] J.Aktman, B.Z. Bobrovsky and L.Hanzo, "Peak-to-Average Power Ratio
Reduction for OFDM Modems", Proc. VTC'2003 (Spring), Jeju,
S.Korea, 2003.
[3] Stefan H. Muller and Johannes B. Huber, "A Comparison of Peak Power
Reduction Schemes For OFDM", Proc. of IEEE Global Telecom. Conf.
GLOBECOM '97, Nov. 1997, Arizona, USA.
[4] Jeffrey G. Andrews, Arunabha Ghosh & Rias Muhamed," Fundamentals
of WiMAX: Understanding Broadband Wireless Networking", Pearson
Education, Inc., United States, ┬® 2007
[5] R. van Nee and A. de Wild. "Reducing the peak-to-average power ratio
of OFDM". Vehicular Technology Conference, 1998. VTC 98. 48th
IEEE, 1998.
[6] Steven W. Smith, "The Scientist and Engineer's Guide to Digital Signal
Processing", Second Edition, copyright ┬® 1999 California Technical
[7] 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 Ltd, West Sussex, England Copyright ┬® 2003