ABSTRACT
The near-infrared Optical Wireless Communications (OWC) technology has been widely studied to provide high-speed wireless connections in indoor applications, such as in personal working and living spaces. In the line-of-sight link-based near-infrared indoor OWC systems, a relatively narrow optical beam is used to establish a wireless communication link directly between the transmitter and the receiver. In the diffusive link-based near-infrared indoor OWC systems, the optical signals reflected in the indoor environment are utilized to provide the data transmission link between the transmitter and receiver. In addition to the light-emitting diode, the laser is widely used in high-speed infrared indoor OWC systems. In indoor infrared OWC systems, the signal transmission link is the free-space. Both OWC and optical fiber communication systems rely on the use of light to carry and transmit data, and most parts of systems are identical, such as the light source, the modulator and the photodiode.
