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.

Authors:

• Ashraf A. Eltholth
• Adel R. Mikhail
• A. Elshirbini
• Moawad I. Moawad
• A. I. Abdelfattah

Keywords:

• HPA
• Huffman coding
• OFDM
• PAR

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