SNIR targets must be
fulfilled in each receiver to obtain a good signal quality (low BER).
To determine the SNIR, WinProp superposes
- thermal noise (depending on the bandwidth of
the channel)
- CCI (co-channel interference (from other
transmitters radiating
on the same carrier frequency)).
- ACI (adjacent channel interference (from other
transmitters radiating on the adjacent carrier frequency)).
The user can display all locations where the SNIR is sufficient
for a good reception of the signal and the user can visualize all areas
where the signal quality is reduced because of the low or even negative
SNIR.
WinProp can model an arbitrary number of types of mobile stations (e.g.
handsets, notebooks, vehicular terminals,...) and all of them with
their individual SNIR targets, noise figures, general losses, fast
fading
margins,.....The mix of mobile stations (e.g. 50% handsets, 30%
vehicular, 20% notebooks) can be defined as well by the user.
For the adaptive coding and modulation techniques (e.g. CS in GPRS and
MCS in EDGE), individual outputs are computed for each CS (Coding
Scheme) and MCS (Modulation and Coding Scheme).
During the planning process the user can already analyze at which
location which MCS are available, leading to peak data rate plots for
the whole areas. For each MCS the target SNIR as well as the min.
required signal level can be defined individually (including different
values for up- and downlink and different types of mobile stations with
individual transceiver capabilities).
