Examples from daily life
Signal strength
Signal-to-noise ratio
Frequency utilisation
Two people speak to each
other (language as a signal).
One person speaks louder
(signal strength increases).
If there is a wall between the
people (unfavourable trans-
mission medium), the speech
becomes quieter (signal de-
creases).
If a person does not turn to-
wards the speaker (unfavour-
able alignment of antennas),
speech is perceived as quieter
(signal decreases).
People with good hearing
(sensitive receivers) can also
understand soft speech (low
signal strength).
Two people speak to each
other (language as a signal).
The people are standing at a
busy road next to each other,
which causes noise (static).
The closer people get to the
road, the louder the noise be-
comes in relation to the
speech (signal-to-noise ratio
decreases). If people stand too
close to the road, they no
longer understand each other.
People can either move away
from the street (noise de-
creases) or speak louder (sig-
nal increases) to improve the
signal-to-noise ratio. It makes
no difference whether a per-
son can hear better (sensitivity
is higher), because with
speech (signal) the street
(noise) is also heard louder.
Many people want to speak
simultaneously (speech as sig-
nal). If one person is speaking
(frequency band is busy), then
no other person can speak
(waiting time), otherwise no
one will understand. People
have to wait until there is a
break in the conversation
("listen-before-talk") and then
they can speak (start radio sig-
nal transmission).
The more people are in a
room, the longer they have to
wait for a break in the conver-
sation (frequency utilisation in-
creases).
People can either spread out
spatially (to avoid hearing
when other people are talking
at the same time) or be short
(to shorten the waiting time),
so that more people can talk in
the same period of time (re-
duce the load on the fre-
quency).
Possible causes for deteriorating environmental conditions in WaveNet
(List without claim to completeness)
WaveNet
(Manual)
4. WaveNet system
26 / 210
Содержание WaveNet
Страница 1: ...WaveNet Manual 07 04 2020...
Страница 183: ...9 Output is switched WaveNet Manual 5 WaveNet Manager 183 210...