Abstract: High-speed wireless optical communication links have become more popular for personal mobile applications. This is a consequence of the increasing demand from the personal information service boom. Compared to the radio frequency domain, optical wireless communication offers much higher speeds and bit rates per unit power consumption. That paper is about indoor optical wireless systems, in that paper the data stream is get first modulated and then get demodulated as in the all cases. The different types of errors are getting introduced in the system which are ISI, artificial light interference and Bit error. The ISI caused by multipath propagation and artificial light interference from fluorescent lamp driven by electronic blast are two major interferences, and these need to be taken into account when validating modulation schemes. The main challenge faced by this work is to seek the most optimized modulation scheme that can provide maximum system throughput while capable of withstanding most if not all of the intense channel interferences at a target BER requirement. Bandwidth efficient schemes such as the OOK and PPM are prone to artificial lighting interferences. This led to a natural conclusion of a modulation scheme that can combine benefits from both above candidates and able to avoid the drawbacks of each individual scheme. So, in this work, Discrete Wavelet Transformation and ANN-based receiver for baseband modulation techniques including OOK, pulse position modulation (PPM) is proposed.

Keywords: Artificial neural network (ANN), optical wireless communication (OWC), wavelet transforms, survey papers.