Improving coverage and data rate in optical wireless systems

Dominic C. O'Brien

doi:10.1117/12.619980

31 August 2005 Improving coverage and data rate in optical wireless systems

Dominic C. O'Brien

Proceedings Volume 5892, Free-Space Laser Communications V; 58920X (2005) https://doi.org/10.1117/12.619980
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

Optical wireless systems, both indoor and outdoor, can offer data rates in excess of those available with RF systems. However, this is usually over a small area in the context of an indoor optical wireless, or over a small range of angular alignments for outdoor Free Space Optics (FSO) systems. Constant radiance considerations play a major part in these limitations, as do the receiver sensitivity for direct detection optical systems. In comparison radio channels operate close to the theoretical limits of channel capacity by using complex modulation, coding and high speed signal processing. In this paper an analysis of the performance of a cellular optical wireless system is undertaken, and opportunities to increase performance examined. More complex modulation schemes appear to offer significant benefits, mainly due to the reduction in channel bandwidth, and the attendant increase in allowable detector area.

Citation Download Citation

Dominic C. O'Brien "Improving coverage and data rate in optical wireless systems", Proc. SPIE 5892, Free-Space Laser Communications V, 58920X (31 August 2005); https://doi.org/10.1117/12.619980

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