Abstract
Indoor wireless optical communication is a good alternative to existing mature RF technology. However various challenges in indoor optical wireless technology are due to free space loss, ambient light, and multi path dispersion causing inter symbol interference (ISI). The degradation in performance due to these facts is very much influenced by the channel topology. So in this paper the performance of indoor optical configuration has been analyzed using three types of channel topologies viz., directed (LOS), non-directed (LOS), and multi beam diffused link for various transmitter and receiver design parameters. The analysis has been carried using Optiwave simulation tools.
Highlights
Indoor optical wireless (IOW) communication system [1] consists of a transmitter which is generally a light emitting diode (LED) or a laser diode with a wavelength ranging from infrared (IR) to ultraviolet (UV) including visible light spectrum
The beam angle has been varied to observe the effect on bit error rate (BER), Q-factor and eye diagram which are shown in Fig. 4, 5 and 6 respectively
The compiled simulation results are shown in table IV which gives the comparison of various performance parameters for varying transmitter beam divergence angle using various channel topology
Summary
Indoor optical wireless (IOW) communication system [1] consists of a transmitter which is generally a light emitting diode (LED) or a laser diode with a wavelength ranging from infrared (IR) to ultraviolet (UV) including visible light spectrum. The advantages of optical wireless communication are availability of large (THz) bandwidth, unregulated spectrum, inherent security, low system cost and immunity towards electromagnetic interference [2]. Such links usually adopt to intensity modulation/ direct detection (IM/ DD) and efficient spatial diversity techniques preventing multi path fading effects [3]. Side and field of view (FOV) at receiver side With this motivation, we in this paper present a simulation based analysis of IOW communication system with receiver mobility. The other one is the non directed-LOS link which involves wider beam divergence angle and comparatively large receiver’s field of view as Journal of Technology Management for Growing Economies, Volume 6, Number 1, April 2015. The receiver consists of PIN photo diode, a low pass filter and an eye diagram BER analyser to visualize the results
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