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A New PAPR Reduction Scheme for OFDM Systems Based on Gamma Correction

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Abstract

Orthogonal frequency division multiplexing (OFDM) is perhaps the most spectrally efficient method discovered so far for communication systems and yet have an excellent immunity against multipath fading and inter-symbol interference. One of the major drawbacks of OFDM systems is their high peak-to-average power ratio (PAPR), which degrades system performance when nonlinear high power amplifiers (HPA) are employed. In this article, a new companding technique based on gamma correction (GC) function is proposed and analyzed. Through extensive computer simulations, it is shown that the proposed technique outperforms the previously suggested A-law and μ-law companding methods for PAPR reduction. A thorough investigation of GCC companding is presented in terms of computational complexity (CC), complementary cumulative distribution function (CCDF), power spectral density (PSD), and bit-error-rate (BER). It is also shown that the proposed method is independent of modulation schemes and can be applied to any number of subcarriers.

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Acknowledgements

The author would like to thank the anonymous reviewers for providing useful comments and suggestions which have enhanced the quality of this paper. Additionally, their queries while reading the paper have been useful in improving the quality of paper and the contents covered.

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  1. Electronics and Communication Engineering, University of Information Technology and Sciences, Dhaka, 1212, Bangladesh

    M. Mahmudul Hasan

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  1. M. Mahmudul Hasan
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Correspondence to M. Mahmudul Hasan.

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Hasan, M.M. A New PAPR Reduction Scheme for OFDM Systems Based on Gamma Correction. Circuits Syst Signal Process 33, 1655–1668 (2014). https://doi.org/10.1007/s00034-013-9712-2

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  • DOI: https://doi.org/10.1007/s00034-013-9712-2

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