| FDD |
Frequency Division Duplex is the first variation
of W-CDMA to be standardised and will appear commercially for
the first time in Japan, mid 2001 |
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| FDM |
Frequency-division multiplexing is a scheme in
which numerous signals are combined for transmission on a single
communications line or channel. Each signal is assigned a different
frequency (subchannel) within the main channel. |
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| FDMA |
Frequency division multiple access. Division of
the frequency band allocated for wireless cellular telephone
communication into 30 channels, each of which can carry a voice
conversation or, with digital service, carry digital data. FDMA
is a basic technology used in the analogue AMPS the most widely-installed
cellular phone system installed in North America. With FDMA,
each channel can be assigned to only one user at a time. The
D-AMPS also uses FDMA but adds TDMA to get three channels for
each FDMA channel, tripling the number of calls that can be
handled on a channel. It is also applicable in fixed networks.
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| Fixed Access |
A terminal access to the network that users wired
technology. |
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| FOMA |
Freedom of Mobile Multimedia Access, DoCoMo's
brand name for 3G services, based on the W-CDMA format. Introductory
FOMA services for a limited number of users is to begin at the
end of May, with full commercial services due in October. |
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| Frequency |
Rate of signal oscillation in hertz, meaning the
number of times the wave form repeats itself in second (measured
in Hertz (Hz) where one Hz is one cycle per second). The frequencies
band assigned to GSM is 900-1800 MHz. For 3G the band assigned
are between 1885-2025 Mhz and 2110-2200 Mhz. |
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| Frequency Band |
Portion of the electromagnetic spectrum within
a specified upper and lower frequency limit. |
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| Frequency Spectrum |
Spectrum available for communication. Regulatory
agencies monitor the occupancy of the radio spectrum and allocate
to individual/group users, enabling a large number of services
to operate within specific limits of interference. |
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| FWA |
Fixed Wireless Access is an emerging terrestrial
system for radio access in the 4GHz and 25GHz bands. It is the
use of wireless technology to replace copper to connect subscribers
to the telephone network and Internet. |
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