Abstract
Microwave to mm-wave radio carriers are commonly employed
for creating high-capacity picocell wireless networks. Advanced radio-over-fiber
(RoF) techniques can efficiently generate and transport such carriers, and
deliver them to simplified antenna stations. As in in-building networks multimode
fiber is predominantly used, adequate radio-over-multimode fiber (RoMMF) techniques
are required to overcome the modal dispersion in multimode fiber links. The
optical frequency multiplying technique is introduced; it is relatively simple
to implement, yet it is shown to be robust against the modal dispersion, and
it is able to generate very pure microwave carriers while requiring only moderate
speed electronics. Thus, it can convey high data rates in comprehensive modulation
formats on multiple-GHz carriers in MMF networks. It offers simultaneous operation
at multiple radio standards, and capabilities for dynamic adaptation of the
radio link parameters such as carrier frequency, transmit power, and other
antenna site functions by means of an embedded control channel. Moreover,
in combination with optical routing it enables dynamically adjustable network
configurations for flexible wireless service delivery.
© 2008 IEEE
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