Title :
Experimental Investigation of Wavelet-Based Denoising Receiver for LOS Indoor Optical Wireless Communications Links
Author :
Rajbhandari, Sujan ; Ghassemlooy, Zabih ; Angelova, M.
Author_Institution :
Opt. Commun. Res. Lab., Univ. of Northumbria, Newcastle upon Tyne, UK
Abstract :
This letter reports the experimental evaluation of the on-off keying (OOK) modulation technique for a nondirected line-of-sight (LOS) infrared optical wireless communication (OWC) link. Performance evaluation is carried out in a typical room environment in the presence of fluorescent light driven by an electronic ballast. The adverse effect of the fluorescent light interference (FLI) is demonstrated and a number of mitigating techniques including high pass filtering (HPF) and discrete wavelet transform (DWT)-based denoising are investigated. The study shows that DWT outperforms HPF for all data rates. The practical measurements are also verified using a computer simulation.
Keywords :
amplitude shift keying; discrete wavelet transforms; high-pass filters; indoor radio; optical links; optical modulation; optical receivers; performance evaluation; computer simulation; discrete wavelet transform-based denoising; electronic ballast; fluorescent light interference; high pass filtering; indoor optical wireless communication; nondirected line-of-sight infrared optical wireless communication link; on-off keying modulation; performance evaluation; wavelet-based denoising receiver; Discrete wavelet transforms; Noise reduction; Optical filters; Optical receivers; Q factor; Wireless communication; Artificial light interference; optical wireless communication; wavelet transform;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2162723
