Abstract
The multipath-induced intersymbol interference (ISI) and fluorescent light
interference (FLI) are the two most important system impairments that affect
the performance of indoor optical wireless communication systems. The
presence of either incurs a high optical power penalty and hence the
interferences should be mitigated with suitable techniques to ensure optimum
system performance. The discrete wavelet transform (DWT) and the artificial
neural network (ANN)-based receiver to mitigate the effect of FLI and ISI
has been proposed in the previous study for the ON–OFF keying (OOK)
modulation scheme. It offers performance improvement compared to the
traditional methods of employing a high-pass filter and a finite impulse
response equalizer. In this paper, the investigation of the DWT-ANN-based
receiver for baseband modulation techniques including OOK, pulse position
modulation, and digital pulse interval modulation is reported. The proposed
system is implemented using digital signal processing board and results are
verified by comparison with simulation data.
© 2011 IEEE
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