Pilot symbol utilization for reducing peak-to-average power ratio in optical OFDM

Funmilayo Bimpe Ogunkoya, Wasiu O. Popoola, Ali Shahrabi, Sinan Sinanovic

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

    Abstract

    One of the evolved technologies which has the prospect of providing huge data rate is visible light communication (VLC). Use of optical orthogonal frequency-division multiplexing (OFDM) has been demonstrated as one of the viable schemes in achieving high data rate in VLC system. However, the limitation of optical OFDM still remains the high peak-to-average power ratio (PAPR) which results in signal distortion and increase in error rate. In this paper, we describe a technique that can mitigate high PAPR in optical OFDM using pilot symbol in the indoor VLC environment. The pilot assisted OFDM system gives 2.4 dB PAPR reduction for a 4-QAM. There is indication from the simulation results that not only can the technique reduce high PAPR but it also offers good bit error rate (BER) performance. For the BER performance of 64-QAM, the pilot symbol estimation error leads to about 0.6 dB degradation at BER of 10-3.
    Original languageEnglish
    Title of host publication2014 9th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2014
    PublisherIEEE
    Pages899-903
    Number of pages5
    ISBN (Print)9781479925810
    DOIs
    Publication statusPublished - 16 Oct 2014

    Keywords

    • optical OFDM
    • visible light communication
    • signal distortion
    • PAPR reduction
    • Optical OFDM
    • pilot symbol
    • BER performance
    • VLC

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