Performance comparison of multiple-access techniques in hybrid fiber–coax return systems
| Autor: | Charles A. Eldering, Floyd M. Gardner, Nageen Himayat, Edwin L. Dickinson |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Coaxial cable
Computer science business.industry Orthogonal frequency-division multiplexing Code division multiple access Hybrid fibre-coaxial ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS Time division multiple access Telecommunications service Broadcasting law.invention Frequency-division multiplexing law Modulation Bandwidth (computing) Digital television business Computer network |
| Zdroj: | Optical Fiber Communications Conference. |
| DOI: | 10.1364/ofc.1995.tuk3 |
| Popis: | Hybrid fiber-coax (HFC) distribution systems provide a high bandwidth and cost-effective connection to the subscriber based on the use of fiber to a node location and subsequent transmission to the subscriber over coaxial cable. The resulting network is a physical point-to-multipoint system from the head-end to the subscriber, which is ideal for broadcast services, such as analog and digital television. Bidirectional telecommunications services can be provided on these networks by using a multiple-access protocol that allows each subscriber to access the head-end by using the return spectrum on the coaxial cable, which is typically in the range of 5–30 or 5–40 MHz. A number of multiple-access techniques, including timedivision multiple access (TDMA), frequency-division multiple access (FDMA), and code-division multiple access (CDMA), are being considered for use in HFC return systems. The requirements for the return-system multiple-access technique include the ability to dynamically assign bandwidth to a subscriber served by a single modem, high capacity, and the ability to provide a relatively error-free link for telecommunications services. In this paper we compare multiple-access schemes by taking into account the actual characteristics of HFC return systems. |
| Databáze: | OpenAIRE |
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