Abstract
An IEEE 802.16e-2005 (WiMAX) compliant, long-reach passive optical network is
demonstrated, focusing on the development of next generation optical access with
transparent wireless backhauling. In addition to the extended feeder reach, a wavelength
band overlay is used to enhance network scalability by maintaining passive splitting in
the field and with some design modification at the optical line terminal and remote base
station. Radio-over-fiber is used to minimize network installation and maintenance costs
through the use of simple remote radio heads complemented by frequency division
multiplexing to address individual base stations. The implementation of overlapping
radio cells/sectors is also proposed to provide joint signal processing at wireless user
terminals. Experimental measurements confirmed EVMs below -30 and -23 dB downstream and
upstream, respectively, over fiber link lengths of up to 84.6km. In addition, adjacent
channel leakage ratio measurements demonstrated that a figure of -45 dB with 40 MHz
subcarrier spacing, as specified by the standard, can be readily achieved.
© 2012 IEEE
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