Abstract
In this paper, we present the design concept and performance
evaluation results of a newly developed DWDM Radio over Free-Space Optics
(RoFSO) system capable of transmitting multiple wireless service signals
simultaneously. The system performance is evaluated over 1-km free-space
transmission under effects of atmospheric turbulence and attenuation.
Effectiveness of a proposed tracking scheme used to mitigate beam
angle-of-arrival (AOA) effect and the viability of the communication system
using a specially designed optical antenna are illustrated. The properties
of free-space propagation under influences of atmospheric turbulence and
attenuation are characterized. We then present the performance of wireless
signals after being transmitted over the system. We verify that the system
can provide a stable connection for wireless services especially with the
absence of strong atmospheric turbulence and heavy rain. Finally, we present
a consideration on the system application by indicating the possible
applicable link range based on the system designed power margin and the
tracking system efficiency. The proposed system is expected to be an
alternative or be combined with wireless over fiber (WoF) to realize a
universal platform for ubiquitous and high throughput wireless
communications.
© 2010 IEEE
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