Peak-to-average power reduction by rotation of the time-frequency representation

    Research output: Contribution to conferencePaper

    8 Citations (Scopus)

    Abstract

    Multi-carrier communication is associated with a high peak-to-average power ratio (PAPR). A new PAPR reduction method is proposed which is based on rotating the time-frequency representation of a transmit signal, prior to transmission. In general, a time-frequency rotation of a multi-carrier signal would change the signal basis, affecting the robustness of the transmit signal in fading channels. Exceptions are transmit signals constructed by (modulated) Hermite functions. The PAPR has been analyzed for transmit signals based on 64 Hermite functions. Allowing a rotation over 16 angles in time-frequency, the PAPR, which occurs with a probability of 0.001, is reduced by 3.8 dB at the cost of an increased computational complexity and a minor loss in spectral efficiency.
    Original languageUndefined
    Pages3722-3727
    Number of pages6
    DOIs
    Publication statusPublished - Dec 2013
    Event2013 IEEE Global Communications Conference, GLOBECOM 2013: The Power of Global Communications - Atlanta, United States
    Duration: 9 Dec 201313 Dec 2013
    http://globecom2013.ieee-globecom.org/

    Conference

    Conference2013 IEEE Global Communications Conference, GLOBECOM 2013
    Abbreviated titleGLOBECOM
    CountryUnited States
    CityAtlanta
    Period9/12/1313/12/13
    Internet address

    Keywords

    • time-frequency rotations
    • papr reduction
    • OFDM
    • crest factor
    • EWI-24065
    • Hermite functions
    • IR-95866
    • Time-frequency analysis

    Cite this