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Achieving high data-rates in optical wireless involves theoretical limits and practical constraints. In this paper we discuss these, with reference to two system examples. A 1.25 Gigabit/s demonstrator that has been fabricated as part of the European Community Framework 7 project OMEGA is described, and a 280Mbit/s demonstrator that is currently under development as part of the same project. In each...
Block transmission with frequency-domain equalization (FDE) has been proven as an attractive alternative to orthogonal frequency division multiplex (OFDM) for radio frequency (RF) communication, especially at 60 GHz. In this paper, we show that FDE can be advantageously applied for optical transmission over dispersive channels as well, and in particular, in direct-detection systems. We review the...
Dilute-nitride lasers with record performances have been used to build uncooled transceivers and failure free 10 Gb/s optical transmission was achieved over 815 m of multimode Corning InfiniCor fiber under the LRM standard.
Fibre to the home and other dasialast-milepsila transmission technologies provide end-user data rates of at least 100 of Mbit/s. These technologies are currently deployed around the world, and in the short term gigabit-class home access networks will be required if this capacity is to be fully used, and new services are to be developed. In order to meet this goal, the Home Gigabit Access Project (OMEGA,...
Wireless communications based on ultra-wide band and on infrared signals exhibit a number of similarities. From an application point of view, both techniques are attractive for short range indoor transmissions; from a technical one, IR and UWB show more analogies than one may expect. In this contribution we compare basic physical properties of both media. Non-directed IR transmission is always based...
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