frequency division multiple access


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frequency division multiple access

This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
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Single-carrier frequency division multiple access (SC-FDMA) represents a technique that is derived from OFDMA with similar throughput, performance, and with comparable complexity.
Since larger numbers of phones can be served by smaller numbers of cell sites, CDMA-based standards have a significant economic advantage over TDMA-based standards, or the oldest cellular standards that used frequency division multiple access (FDMA).
The legacy link-based architecture uses frequency division multiple access, which is not the most efficient way for several terminals to share the aggregate available bandwidth, nor does it allow for prioritization or quality of services on data and voice transmissions of Internet Protocol (IP) traffic.
The Broad@ir system comprises both wireless base stations and compact customer terminals utilizing Broadstorm's patented, OFDMA (orthogonal frequency division multiple access) airlink technology called CelerFlex(TM).
The end result is more efficient use of the small slices of frequency spectrum used in analog frequency division multiple access, digital TDMA and GSM technologies, and less spectrum regrowth when applied to spread spectrum technologies used in GDMA and W-CDMA.
The practice of dividing the larger bands into sub-bands is referred to as frequency division multiple access (FDMA) and is widely used in cellular communications.
WiMAX [1] networks are a wireless network that has a high class set of features with a lot of flexibility in terms differentiates it from other metropolitan area wireless access technologies are: a) Orthogonal Frequency Division Multiplexing (OFDM) based physical layer, b) Very high peak data rates, c) Scalable bandwidth and data rate support, d) Adaptive modulation and coding (AMC), e) Link-layer retransmissions, f) Support for Time Division Duplex (TDD) and Frequency Division Duplex (FDD) g) Orthogonal Frequency Division Multiple Access (OFDMA), g) Flexible and dynamic per user resource allocation, h) support for advanced antenna techniques, x.
LTE uses orthogonal frequency division multiple access (OFDMA) for the downlink and single carrier FDMA (SC-FDMA) for uplink.
Orthogonal frequency division multiple access fundamentals and applications.
The lot 10 version of the system was put on contract last September and it contains a Ka-Band capable Frequency Division Multiple Access modem.
Details of a trial of broadband fixed and mobile Orthogonal Frequency Division Multiple Access (OFDMA)/TDD pre-WiMAX systems from Adaptix, an all-IP OFDMA wireless broadband access technologies provider, have been revealed.

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