Abstract
In this Letter, we experimentally demonstrate a full-duplex
transmission system of IEEE 802.11ac-compliant multiple-input
multiple-output (MIMO) signals over a 2-km 7-core fiber for in-building
wireless local-area network (WLAN) distributed antenna systems. For
full-duplex 3×3 MIMO demonstration, the crosstalk impacts of both
fiber-transmission-only and optic-wireless transmission situation are
evaluated. The results indicate that the impact of crosstalk on
radio-over-fiber (ROF) link performance is not significant and the quality
of the cascaded multi-core fiber and wireless channel is mainly determined
by the wireless part. To further improve the system capacity, polarization
multiplexing (PolMux) technology is employed to achieve a full-duplex 6×6
MIMO over a single 7-core fiber. Although employing the PolMux method will
slightly decrease the EVM and condition number performance as opposed to a
non-PolMux MCF system, it is still a competitive solution in large optical
connection demand scenarios that require a low cost.
© 2016 Chinese Laser Press
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