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IntroductionGPS and Assisted GPS

24Operating Manual 1171.5248.12 ─ 15

5. "Synchronize" the Assistance Data (Satellite Configurations and Reference Location

Configuration) with the settings that have been already made.

6. Select the "Number of Satellites" and the Satellites IDs ("SV ID") for which assistance

data is to be generated.

7. Reconfigure the reference location (i.e. BS location instead of receiver location).

8. Enter the "Time", "Duration" and "Resolution of Assistance Data".

9. Generate the required assistance data (almanac file, ionospheric file, etc.).

The generated assistance data files are saved in the selected folder. Refer to the

description of the corresponding file for description of the file format used.

Generated almanac files can be later loaded at the instrument and used like the main

almanac source.

2.8.8 Generating an one-satellite static generic GPS signal with R&S

WinIQSIM2

The generic workflow for generating of GPS signal with R&S WinIQSIM2 and saving it

as a waveform is as follow:

1. Execute "Set To Default" to adjust the instrument's settings to a standard set of oper-

ating conditions.

2. Select the required "RF Band".

3. Select an arbitrary data or "Real Navigation Data" as "Data Source".

4. When using Real Navigation Data, use the "Select Almanac File" function and choose

an almanac file.

The navigation message will be extracted from this almanac file.

5. Adjust the "Duration of Satellites Simulation".

6. Adjust the "Date" and the simulation time ("GPS Mean Time").

7. Select a "Marker Delay" to overcome the limitation for the second's subfield and gen-

erate a signal with time of simulation different than 0s, 6s, 12s, etc.

8. Select "Satellite Configurations" and configure the satellite as required.

9. Set the GPS "State" to ON to enable the GPS signal generation.

10. Select the "Generate Waveform File" to save the GPS signal as waveform file.

Typical Workflows

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Case K44 Spécifications Page 38