4 High-frequency technology
High-frequency technology often used systems
for the wireless transmission information such as
voice, data video.
GPS
GPS, Global Positioning System, satellite sys-
tem for determining location.
SAT-TV
Like GPS, SAT-TV uses satellite system for transmis-
sion and used for transferring analogue and digital
TV programmes.2. Possibly the best-known
application this technology navigation systems.
UMTS/LTE
The Universal Mobile Telecommunications System
(UMTS) allows much higher data rate than GSM. therefore very
versatile.
However, also offers the possibility circuit-
switched and packet data transport. can used
for classic voice transmission but also for data, sig-
nalling and positioning services. The service also used authorities and
organisations performing safety and security tasks
(BOS).3. This section introduces several of
the best-known technologies:
GSM
GSM stands for Global System for Mobile Communic-
ations and global standard for all-digital mobile
communications. used primarily for pure tele-
phony between mobile telephone subscribers. GSM was intro-
duced Germany 1992.3.
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Chapter The internal lightning protection system
. receive the signals satellite dish
and LNB (Low Noise Block) are needed; the LNB
converts the frequencies from satellite transmission in-
to frequencies that can used coaxial cables. LTE also used for supplying broadband
data services rural regions eliminate blank spots,
i.
This third-generation standard permits transmission
speed Mbit/s with HSDPA+ 300 Mbit/s
with the fourth-generation standard, LTE (Long Term
Evolution).
TETRA/BOS
TETRA standard for digital trunked radio and
stands for “terrestrial trunked radio”.e. areas with less than Mbit/s data connection
