Exponential companding and active constellation extension comparisons for PAPR reduction

Atso Hekkala, Sandrine Boumard, Mika Lasanen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    3 Citations (Scopus)


    One of the major drawbacks of the orthogonal frequency division multiplexing (OFDM) type of communication is the high peak-to-average power ratio (PAPR) of the transmitted signal. Unless carefully tackled, this may cause either reduced energy efficiency or increased nonlinear distortion when the signal is amplified for transmission. For improving energy efficiency, this paper considers PAPR reduction in OFDM based systems. In particular, we study and compare some PAPR reduction approaches including three exponential companding and active constellation extension (ACE) methods. We discuss the trade-offs of the methods. In addition, for the ACE method defined in the ETSI standard, we propose some modifications that give about 1 dB more PAPR reduction without any additional power increase of the transmitted signal. Moreover, if some spectral regrowth due to the PAPR reduction is acceptable, exponential companding approaches can also be used.
    Original languageEnglish
    Title of host publication26th International Teletraffic Congress
    PublisherIEEE Institute of Electrical and Electronic Engineers
    Number of pages5
    ISBN (Electronic)978-0-9883045-0-5
    Publication statusPublished - 2014
    MoE publication typeA4 Article in a conference publication
    Event26th International Teletraffic Congress, ITC 26 - Karlskrona, Sweden
    Duration: 9 Sept 201411 Sept 2014
    Conference number: 26th


    Conference26th International Teletraffic Congress, ITC 26
    Abbreviated titleITC 26


    • ACE
    • active constellation extension
    • exponential companding
    • OFDM
    • peak-to-average power ratio


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