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Transforming the Statistical Distribution of Wireless OFDM Signal for PAPR Reduction

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Abstract

To reduce the high peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signal, a novel nonlinear companding transform (CT) scheme is proposed in this paper. This scheme can reallocate both the amplitude/power as well as statistical distribution of the companded signal more reasonably and flexibly than existing CT methods with low computational complexity. By choosing an appropriate companding parameter, it can provide more effective PAPR reduction but at the price of a minimal amount of bit-error-rate (BER) performance degradation caused by the companding distortion. The closed-form expressions including the achievable PAPR gain, signal attenuation factor, and corresponding selection criteria for the companding parameter were derived. Computer simulations demonstrate that the scheme significantly improves the overall performances of OFDM system in terms of PAPR, BER and bandwidth efficiency under the multipath fading channel or with the high power amplifier.

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Acknowledgements

The authors would like to thank the anonymous reviewers, and also thank the support by the National Natural Science Foundation of China (No. 61101145), and 111 Project (No. B08038).

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Authors and Affiliations

  1. State Key Laboratory of Integrated Service Networks, Xidian University, Xi’an, 710071, China

    Yong Wang & Li-hua Wang

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  1. Yong Wang
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  2. Li-hua Wang
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Correspondence to Yong Wang.

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Wang, Y., Wang, Lh. Transforming the Statistical Distribution of Wireless OFDM Signal for PAPR Reduction. Wireless Pers Commun 96, 765–777 (2017). https://doi.org/10.1007/s11277-017-4199-y

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  • DOI: https://doi.org/10.1007/s11277-017-4199-y

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