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Wavelet packet modulation (WPM) is known to be an alternative to orthogonal frequency division multiplexing (OFDM) for future multicarrier communication systems. OFDM has been considered for visible light communications (VLC) with intensity modulation and direct detection (IM/DD), which requires transmitted signals to be unipolar, i.e., real and non-negative. Among several unipolar OFDM techniques,...
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