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The efficient denoising artificial light interference using discrete wavelet transform with application to indoor optical wireless system

— Reducing the effect of the artificial light interference (ALI) in indoor optical wireless (OW) communication is a challenging prospect because of the spectral overlaps between the interference and the baseband modulating signal. High pass filtering is used for mitigating the effect of ALI; however it introduces another form of interference known as baseline wander (BLW). In this paper, an alternative approach is investigation to minimize the performance degradation due to ALI using the discrete wavelet transform (DWT). Performances of different digital baseband modulation techniques are examined under the influence of the ALI in line-of-sight (LOS) links and we show that the DWT is very effective in reducing the effect of the ALI.