How to perform radio coverage

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How to perform radio coverage

 

Things to know first

Radio coverage of what?

Suppose a unit is stationary while the other is moved everywhere around. The system parameters are the same as those seen in Radio link, except for the position of the mobile unit.

Performance to meet

The program uses Rx Threshold in S-unit, in microVolt, dBm or in microVolt/m. The performance thresholds in S-unit are relative to receiver sensitivity while the others are taken at the receiver input (see Radio link and system performance).

Single Polar

The surface is covered according to polar coordinates around the centre unit. Range and azimuth span, and azimuth increment can be adjusted.

Combined Cartesian

The surface is covered according to small squares of variable pixel size. Many sites can be used to produce a combined coverage with the best signal available at each position on the map.

Interference

The surface is covered according to small squares of variable pixel size. The coverage of a single transmitter side can be shown in two colours: the first colour shows the normal coverage according to a minimum signal to meet, while the second colour indicates that a signal from a second transmitter is interfering. Interference occurs when the minimum Signal to Interference ratio is not met.

Rendering

Fill area and/or signal contours can be selected. Coverage colour is mixed to the map picture with a logical and. (Better resolution means more computer time).

Antenna pattern

If a non-directional antenna is used for centre unit, the antenna will be pointed toward the original right unit position. This orientation can be modified with the antenna azimuth text box.

 

Step by step

1. Create a gray slope picture map (see How to create a map picture).

2. Position the centre unit (see How to position units).

3. Enter network parameters for the centre unit and mobile unit (see How to create a network).

4. In the Tools menu select Radio coverage then Single Polar

5. Select appropriate centre unit, mobile unit, and net.

6. Select Threshold of 1 and 11 S-unit, radial range from 0 to 100 km, azimuth range from 0 deg. to 360 deg. at 1 deg. step.

7. Check the Fill area with yellow colour.

8. Click the Apply button.

 

© Copyright G3TVU

23rd January 2014