KEYWORDS: Analog electronics, Modulation, Receivers, Radio optics, Transmitters, Orthogonal frequency division multiplexing, Interfaces, Field programmable gate arrays, Signal processing, Avalanche photodetectors
Face to the continuous wireless data throughput increase demand and with the aim of simplification, we carried out an architectural study as part of the European collaborative project WORTECS [1]. This study proposed to find a common architecture between wireless radio and wireless optical systems that will allow us to mutualize as much as possible the processing in order to reduce integration complexity and cost. In this paper, after introducing some characteristics about propagation model simulation, we will present common architecture between wireless radio and optical transmission schemes and argue about Graphic Unit Interface development. The main functionalities are defined through three electronic boards able to provide 2 Gbps data rates over 2 wavelengths. Then, before conclusion, we will present the software tool and be focus on preliminary results.
The information networks of the future will consist of an all-optical core, with wireless access technologies wherever possible. The fibre networks are extending their reach rapidly, and will further extend to individual spaces within homes and office buildings. The data traffic on networks and the demand for wireless services are also growing exponentially and the nature of services is also evolving with rapid increase in the number of devices. A new generation of 3D displays, with the ability to create Virtual Reality (VR) environments, is being launched. VR technology places significant demands on bandwidth, latency, positioning and mobility. One challenge addressed by our European collaborative project WORTECS is the development of an optical wireless system able to deliver ultra-high throughput (up to Tbps). The first demonstrator focuses on a high density network that can provide > 1 Gbps per user with multi user, but has the potential to provide Tbps per indoor environment. The second demonstrator focuses on ultra-high data rate links with a novel fibre-optical wireless-fibre approach to create Tbps capable links. VR is targeted as a demanding application, however, other applications include wireless data centers and aircraft cabins. In this paper, after introduction on the demand for wireless Terabit/s communication, we will focus on VR use case and the need for multi-Gigabit/s data rates. Then we will present the challenges for the project and propose new optical wireless system architecture and system engineering associated to new approach in space and frequency diversity with OFDM and adaptive bit rate for VR.
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