Rajbhandari S.,Optical Communication Research Group |
Rajbhandari S.,Northumbria University |
Ghassemlooy Z.,Optical Communication Research Group |
Angelova M.,Northumbria University
2010 7th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2010 | Year: 2010
The optical power penalty (OPP) due to the artificial light interferences (ALIs) can be significantly high in an indoor optical wireless communication (OWC) channel making such link practically infeasible. A discrete wavelet transform (DWT) is an effective technique in reducing the ALI effects. The DWT has the advantage over the high pass filtering (HPF) to reduce ALI in terms of complexity and performance. In this paper, a comprehensive study of the DWT based denoising for the on-off keying (OOK), pulse position modulation (PPM) and digital pulse interval modulation (DPIM) is provided. The OPPs due to ALIs and DWT based denoising for these modulation techniques are presented. © 2010 IEEE.