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Demonstration of Wireless Backhauling Over Long-Reach PONs

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5 Author(s)
Milosavljevic, M. ; Sci. & Technol. Res. Inst. (STRI), Univ. of Hertfordshire, Hatfield, UK ; Thakur, M.P. ; Kourtessis, P. ; Mitchell, J.E.
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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 84.6 km. 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.

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Lightwave Technology, Journal of  (Volume:30 ,  Issue: 5 )