Resampling Principle; A.1.5 Resampling Principle - R&S SMW-K44 User Manual

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</waypoints>
</trajectory>

A.1.5 Resampling Principle

The resampling principle is common to all movement or motion files. To explain the
principle, we use the simple waypoint file text format described in
point File
The 3GPP Performance Test Scenario#3 "Melbourne" file, that is used in the example
there, uses a resolution of 50 ms.
This resolution is different than the internally used resolution of 10 ms. The waypoint
file is resampled (in this case upsampled) and the waypoints linearly interpolated. Four
samples are inserted between any two consecutive waypoints so that the sampling
rate of 100 Hz (10ms) is achieved.
Figure A-2: Principle of waypoint file upsampling (extract of a waypoint file shown)
1, 2, 3 = Coordinates of the first three waypoints in the file
4
5
If a resolution of 5 ms is used in the same waypoint file, this file is downsampled. Each
second waypoint is discarded. This case is illustrated on
Figure A-3: Principle of waypoint file downsampling (extract of a waypoint file shown)
1, 2, 3 = Coordinates of the first three waypoints in the file
2
4
The described resampling principle applies also for resolutions that are not multiple of
10 ms.
User Manual 1178.6379.02 ─ 01
<waypointvector data="0.40,144.966634931642,-37.8166611382304,100.000000762753"/>
<waypointvector data="0.45,144.96663104183,-37.8166606246233,100.000000941567"/>
<waypointvector data="0.50,144.966627163843,-37.8166600575235,100.000001138076"/>
<waypointvector data="0.55,144.96662329885,-37.8166594371019,100.000001354143"/>
Format", on page 390.
= Resolution
= Inserted waypoints
= Second waypoint removed
= Resolution
User Environment Files
Movement or Motion Files
Chapter A.1.1, "Way-
Figure A-3.
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