Novel Flip-OFDM Modulation Scheme based on Discrete Hartley Transform

Mohammed K. Mohaisen

Abstract


In the domain of visible light communication (VLC), rapid data transmission is based on intensity modulation/direct detection (IM/DD) using flip-orthogonal frequency division multiplexing (flip-OFDM), which is based on the discrete Fourier transform (DFT). Because DFT operates on complex-valued signals, it requires Hermitian symmetry (HS) to produce a real-valued output, thereby doubling computational complexity. This study presents a novel approach that doubles spectral efficiency while halving computational complexity by using the discrete Hartley transform (DHT) instead of the DFT. The analytical results show that the system reduces computational complexity by 45.5\% compared to the conventional scheme. Furthermore, the simulation results show that the new system achieves the same bit-error rate (BER) while reducing the peak-to-average power ratio (PAPR) by 0.3 dB.  The comparison seeks to substantiate the advantages and efficacy of the new system relative to the current technique.

Keywords


VLC; DHT; flip-OFDM; computational complexity; spectral efficiency; BER; PAPR.

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References


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DOI: http://dx.doi.org/10.5281/zenodo.17880789

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