International
BRAZILIAN EVALUATION GROUP
Brazil-EG
Evaluation
of Technology IP-OFDMA software
This program simulates the propagation
of technology IP_OFDMA in diverse environments using some models.
The use way consists of a
series of stages until arriving in the final results. The stages are:
1) Basic Parameters:
Input the
mainly parameters about your simulation, such as:
- Frequency
(GHz)
- Antenna
(BS) – antenna gain in base station
- Antenna
(MS) – antenna gain in mobile station
- Power
(BS) – power in base station
- Power
(MS) – power in mobile station
- Variable
(dB)
2) Sensitivity parameters:
The sensitivity parameters are in accordance with the model
of equipment. Thus, to fill the table of parameters, you need to verified the
data, already priced in the address of the page.
3) Core characteristics:
Select the channel and the flow and input the BS-to-BS distance
and maximum users supported by system.
4) Propagation
Choose the Propagation Model, Environmental Beta, Path loss,
Initial Distance, Variable Distance and Final Distance, being that:
·
The Propagation Model
normally is the Shadowing, therefore to another option it is the free space
(vacuum).
·
The Environmental Beta
represents the quality of the environment to be studied. Its value varies
between 2 and 6, and how much bigger it will be, worse it is the condition of
the environment.
·
The Path loss is the
loss throughout the way, also loss call multhpath.
·
The initial and final
distance is the distances that the propagation will be studied by the
simulator.
·
The variable distance
means the frequency in meters where the received power will be evaluated.
Moreover,
it must be chosen enters two options of analysis: on the basis of the distances
or on the basis of the minimum sensitivity of the equipment.
5) Type of analysis:
After all the parameters placed
in the first screen, select the type of analysis to be made:
- BS-to-BS analysis: when the two stations are stops
- BS-to-MS analysis: when a station is stopped and to another
one in movement
Figure 1 - Simulations parameters
Analysis
Results
After all the selected parameters and
chosen options of simulation, we will have three resultant graphs:
1) Distance Analysis
This first graph presents the
variation of the power through the environment (dBm) for in the distance
average reached (Km).
The red and yellow lines
respectively mean the minimum sensitivity of the equipment chosen for 10MHz and
5MHz.
Figure 2 – Distance
2) Transmission Map
This second graph presents the
distribution of rates in the propagation area, being that how much lesser the
power, smaller is the rate and clearer is the area of the graph. The inverse
one also is correct to affirm being that the area darkest has the bigger power
and rate.
The limits and the bands (%)
presented in the graph are gotten of the parameters of sensitivity of the
equipment.
Figure 3 – Map of propagation
3) Users Analysis
In the third graph have
relation between the distances and the number of users who will be able to use
the system.
The red line is the line of the
user and the others are the sensitivity parameters of equipment.
Figure 4 – Users