Journal ArticleDOI
A hybrid approach to the transmission of telephony over a passive optical network
Richard Mudhar
- Vol. 5, Iss: 2, pp 77-83
TLDR
This paper describes a hybrid transmission method using sub-carrier multiplexing (SCM) and time division multiplexed (TDM) which seeks to reduce the overall complexity of the system, thereby lowering costs.Abstract:
Passive optical networks (PONs) are attractive for the provision of telephony via optical fibre in the local loop, and have generally tended to concentrate on the use of time-division multiple access for transmission. This paper describes a hybrid transmission method using sub-carrier multiplexing (SCM) and time division multiplexing (TDM) which seeks to reduce the overall complexity of the system, thereby lowering costs.read more
Citations
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Patent
Bi-directional optical communications subscriber transmission system using a single wavelength
TL;DR: In this paper, the exchange-to-subscriber signal is a high-speed, wideband signal which is bandwidth limited by means of a low-pass filter, and the subscriber-toexchange signal is an intermediate carrier having a frequency higher than the upper limit of the exchange to sub-carrier signal and which is modulated with a low speed, narrowband signal.
Patent
Passive optical telecommunication system
TL;DR: In this article, a passive optical telecommunication system having a central station communicating via respective optical waveguides with a number of decentralized stations, an electrical carrier signal is DPSK-modulated in the upstream transmission, after which the electrical signal modulated in this way effects the intensity modulation of the emitted light.
Proceedings ArticleDOI
Cost-effective FITL technologies for small business and residential customers
TL;DR: The paper describes the main technical features of the system and network applications which shows how the system may be introduced in network planning and based on Passive Optical Network technology where video is distributed in the 1550 nm window and telecoms services transmitted at 1300 nm in full duplex mode.
Journal ArticleDOI
Novel burst transmission technique for fiber-in-the-loop-systems comprising passive optical networks having wide dynamic ranges
S. Neidlinger,T. Bolze +1 more
TL;DR: In this article, the authors proposed a burst transmission procedure for a commercial fiber-in-the-loop (FINL) system, which is suitable for fast clock recovery, high-pass transmission and a wide dynamic range of the receiver.
References
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Journal ArticleDOI
Subcarrier multiplexing for lightwave networks and video distribution systems
TL;DR: Applications for subcarrier multiplexing include a variety of analog and digital lightwave transmission systems that include multiuser interactive local area networks and multichannel digital, FM, and AM-VSB (vestigal sideband) video distribution systems.
Journal ArticleDOI
Subcarrier multiplexing for multiple-access lightwave networks
TL;DR: In this article, the applicability of subcarrier multiplexing to light-wave multiple-access networks is discussed. But the authors focus on the application of sub-carrier MIMO to lightwave multiple access networks.
Journal ArticleDOI
Technology and system issues for the WDM-based fiber loop architecture
S.S. Wagner,H.L. Lemberg +1 more
TL;DR: In this paper, a fiber-optic subscriber loop architecture employing multichannel wavelength-division multiplexing (WDM) techniques is discussed, which is called the passive photonic loop (PPL).
Journal ArticleDOI
Optical interference in subcarrier multiplexed systems with multiple optical carriers
TL;DR: It is shown that, when multiple optical carriers are used in a subcarrier multiplexing system, optical interference noise limits the system bandwidth or the number of available channels, but this number can be increased carefully by choosing and maintaining separate wavelengths for the lasers, in order to minimize the interference noise.
Journal ArticleDOI
Optical networks for local loop applications
TL;DR: In this article, the authors examined some of the options for optical technology within the local loop environment, in particular, passive shared access networks have been considered in some detail, and an intermediate approach of terminating the fiber network at the final network distribution point, with copper retained for the final leg, may be used prior to the provision of broadband services.