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Error vector magnitude (EVM) is a commonly used metric to characterize distortions. We numerically calculate the EVM of clipped optical orthogonal frequency division multiplexing (OFDM) signals and compare with lower bounds.
Orthogonal frequency division multiplexing (OFDM) has been considered for visible light communication (VLC); thanks to its ability to boost data rates as well as its robustness against frequency-selective fading channels. A major disadvantage of OFDM is the large dynamic range of its time-domain waveforms, making OFDM vulnerable to nonlinearity of light emitting diodes. DC-biased optical OFDM (DCO-OFDM)...
When an orthogonal frequency divisionmultiplexing (OFDM) signal is transmitted through a peak-power limited device, system designers must choose from several options to deal with the large dynamic range problem of OFDM. In this paper, we are interested in comparing i) clipping with gain, ii) modified piece-wise linear scaling (MPWLS) and iii) piece-wise optimized clipping (PWOC) techniques in terms...
Crest factor reduction (CFR) techniques aim to solve the high peak-to-average power ratio (PAR) problem encountered in the transmission of modern communication signals such as orthogonal frequency division multiplexing (OFDM). Constrained clipping is a promising CFR technique that is capable of large PAR reductions while guaranteeing that EVM and spectral mask constraints are met. In this paper, we...
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