The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The hOME Gigabit Access (OMEGA) home-area-network project aims at bridging the gap between home and access network and providing Gb/s connectivity to users. The project considers a combination of various technologies such as radio-frequency and wireless optical links operating at infrared and visible wavelengths. When combined with power-line communications (PLC), this enables a home backbone that...
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...
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,...
Personal optical wireless communication POW is a promising solution for increasing the available communication bandwidth within a room. This technology can offer, with line of sight and diffuse propagation, very high-speed communications between portable devices. This paper presents a generic line of sight, wide line of sight (LOS/WLOS) propagation model and a diffuse (DIF) propagation model for the...
Gigabit home access networks (HANs) are a pivotal technology to be developed if the European Union (EU) Vision of the Future Internet is to be realised. Consumers will require such HANs to be simple to install, without any new wires, and easy enough to use so that information services running on the HAN will be ldquojust another utility,rdquo as, for instance, electricity, water and gas are today...
Infrared personal optical wireless (POW) refers to use of free-space propagation of infrared for short range communications in an indoor context. POW offers several advantages over radio technologies, making it an attractive solution for home networks. Orthogonal modulations such as OFDM are currently used in many radio transmission standards. Among these modulations, OFDM/OQAM is an interesting alternative...
Optical wireless communication link (OWCL) requires a good transmission channel characterization. We present a physical method that uses a reduced-size model in order to characterize the impulse response of the optical wireless channel in real indoor environments filled with furniture. High resolution and real time characterization are the advantages of the method.
As a part of the EU-FP7 R&D programme, the OMEGA project (hOME Gigabit Access) aims at bridging the gap between mobile broadband terminals and the wired backbone network in homes. To provide Gb/s connectivity a combination of various technologies is considered. Beside radio frequencies, the wireless links will use infrared and visible light. Combined with power-line communications this enables...
By Transmitting unipolar positive signals, a novel association of Alamouti space-time coding to free-space optic (FSO) communication is presented. We examine intensity modulation (IM) based on electrical fast Fourier transform (FFT) design with Hermitian symmetry. The proposed technique aims at limiting signal fading due to scintillation. It maximizes the spatial diversity, increases the reliability,...
Personal optical wireless (POW) refers to use of free- space propagation of light for short range communications in an indoor context. POW offers several advantages over radio technologies, making it an attractive solution for home networks. Orthogonal modulations such as OFDM are currently used in many radio transmission standards. Among these modulations, OFDM/OQAM is an interesting alternative...
We propose recently in a pan to use these objects as optical amplifiers. This aim requires working in a complete different direction. Firstly it is not suitable to have a good quality factor for the micro-sphere, because we want to avoid the lasing effect and the interferences between the many round-trip fields that will give a severe limitation to the optical bandwidth. Secondly, it could be interesting...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.