Abstract
Orthogonal frequency division multiplexing based on radio-over-fiber schemes allows the direct use of multiple, native format wireless platforms. In combination with standard baseband provision such as Gigabit Ethernet, this provides access to a wide range of services without requiring specialized end-user equipment. However, such signals have a high laser power-bandwidth requirement which may not be a good fit to the domestic environment. Here we explore the use of low-power optical components in customer premises which interface with an intermediate optical network node. Two solutions in the context of SSMF over a CWDM optical network are described, based on either reflective or direct modulation. EVMs of better than −35 dB were achieved.
Highlights
There is much interest currently being focused on commercial, off-the-shelf technology for delivery of wireless signals such as ultra-wide band (UWB), WiMAX, LTE and baseband signals including Gigabit Ethernet (GbE) over legacy standard single mode fiber (SSMF) e.g [1]
The introduction of an intermediate node allows the use of standard central exchange wavelength division multiplexing (WDM); with the final span deploying low power devices in coarse wavelength division multiplexed (CWDM) format to the end user premises
We evaluated experimentally the ability of each one to deliver simultaneously three OFDM based wireless formats (LTE, WiMAX, and WiMedia UWB), and a digital baseband signal in both upstream (US) and downstream (DS) direction
Summary
There is much interest currently being focused on commercial, off-the-shelf technology for delivery of wireless signals such as ultra-wide band (UWB), WiMAX, LTE and baseband signals including Gigabit Ethernet (GbE) over legacy standard single mode fiber (SSMF) e.g [1]. This device operated as a reflective modulator at 1500nm and as an absorptive detector at 1300nm wavelengths Such an arrangement permitted both US and DS lasers to be remotely sited and ideal for customer premises provision. These devices were capable of operation over a wide RF bandwidth and were sufficiently linear to handle OFDM-based wireless formats. 802.11ac is set to offer multi-user MIMO and beam-forming capability at predicted capacities of 1.3 Gbit/s (plus 450 Mbit/s legacy).The putative offer of GbE to the home via wireless has been considered on many previous occasions but this scenario is closer Both schemes offer RoF range extension to 100km or beyond with a user friendly domestic optical interface. The ability of standard wireless formats to co-exist with baseband signals in this environment creates a flexible “band agnostic” transmission system
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