Abstract
This paper introduces two radio-over-fiber (RoF) architectures for the future broadband
optical-wireless access network—all-band RoF and band-mapped 60-GHz RoF that can be integrated in ultra-dense
wavelength division multiplexing passive optical network (UDWDM-PON). Legacy wireless services and multi-gigabit
millimeter-wave (mm-wave) applications are integrated and delivered simultaneously under one shared infrastructure.
With centralized system control and signal processing, the proposed systems provide cost-effective and
protocol-transparent solutions for the next-generation multi-service bundle in heterogeneous networks (HetNets). In
the all-band RoF network where wireless services are kept at their original carrier frequencies, Wi-Fi, WiMAX, and
60-GHz high-speed mm-wave services are transmitted based on subcarrier multiplexing (SCM) and dual-wavelength
heterodyne beating techniques in avoidance of optical filters and large-bandwidth optoelectronic components. In the
indoor environment, the band-mapped mm-wave RoF design is illustrated with real-time analog television signal, Wi-Fi,
and high-speed digital baseband data—all of which are transmitted over unified optical and air links. By mapping
various wireless signals into 60-GHz sub-bands, the novel architecture achieves higher spectral efficiency and lower
power consumption.
© 2013 IEEE
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