A comparison of OFDM-based modulation schemes for OWC with clipping distortion

Svilen Dimitrov, Sinan Sinanovic, Harald Haas

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    22 Citations (Scopus)


    In this paper, the electrical power requirement and spectral efficiency of multi-carrier transmission schemes for optical wireless communications (OWC) are compared in the presence of front-end-induced double-sided signal clipping. The two existing multi-carrier modulation techniques based on orthogonal frequency division multiplexing (OFDM), direct-current-biased optical OFDM (DCO-OFDM) and asymmetrically clipped optical OFDM (ACO-OFDM), are studied. The clipping noise can be modeled according to the Bussgang theorem and the central limit theorem (CLT) as attenuation of the data-carrying subcarriers and addition of zero-mean complex-valued Gaussian noise. Presented closed-form expressions for the attenuation factor and the clipping noise variance are employed in the derivation of the effective electrical signal-to-noise ratio (SNR).
    Original languageEnglish
    Title of host publicationIEEE GLOBECOM Workshops (GC Wkshps), 2011
    Number of pages5
    ISBN (Print)9781467300391
    Publication statusPublished - 2011


    • optical wireless communications
    • power systems
    • OFDM
    • modulation


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