Abstract
Hybrid fiber-wireless networks incorporating WDM technology for fixed
wireless access operating in the sub-millimeter-wave and millimeter-wave
(mm-wave) frequency regions are being actively pursued to provide untethered
connectivity for ultrahigh bandwidth communications. The architecture of
such radio networks requires a large number of antenna base-stations with
high throughput to be deployed to maximize the geographical coverage with
the main switching and routing functionalities located in a centralized
location. The transportation of mm-wave wireless signals within the hybrid
network is subject to several impairments including low opto-electronic
conversion efficiency, fiber chromatic dispersion and also degradation due
to nonlinearities along the link. One of the major technical challenges in
implementing such networks lies in the mitigation of these various optical
impairments that the wireless signals experience within the hybrid network.
In this paper, we present an overview of different techniques to optically
transport mm-wave wireless signals and to overcome impairments associated
with the transport of the wireless signals. We also review the different
designs of subsystems for integrating fiber-wireless technology onto
existing optical infrastructure.
© 2010 IEEE
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