W-CDMA BS (Base Station)

The following predefined configurations are based on 3GPP TS 25.141 V8.3.0 (2008-05).

 

Profile Details - Case 1

Case 1, speed 3 km/h

Path

Delay
[ ms]

Rel Loss
[dB]

Fading
Type

1

0

0

Rayleigh

2

.976

10

Rayleigh

 

Profile Details - Case 2

Case 2, speed 3 km/h

Path

Delay
[ ms]

Rel Loss
[dB]

Fading
Type

1

0

0

Rayleigh

2

0.976

0

Rayleigh

3

20

0

Rayleigh

 

Profile Details - Case 3

Case 3, speed 120 km/h

Path

Delay
[ ms]

Rel Loss
[dB]

Fading
Type

1

0

0

Rayleigh

2

0.26

3

Rayleigh

3

0.521

6

Rayleigh

4

0.781

9

Rayleigh

 

Profile Details - Case 4

Case 4, speed 250 km/h

Path

Delay
[ ms]

Rel Loss
[dB]

Fading
Type

1

0

0

Rayleigh

2

0.26

3

Rayleigh

3

0.521

6

Rayleigh

4

0.781

9

Rayleigh

 

Birth Death

There are two paths per channel. The paths are non-faded with equal strength and equal phases. A group of delay values is generated for each path between the Minimum Delay value and the Maximum Delay value in increments of the Delay Bin Spacing value. ClosedDetails...

Referencing 3GPP TS 25.141 V8.3.0 (2008-05) Birth-Death propagation conditions..

A value is chosen randomly for each path such that the resulting delay is different for both paths. Then the paths are sequenced in the following manner.

Starting with Path1, the delay is held for Path1's Dwell Time at which point a new delay is randomly selected for Path1 from its delay group such that the Path1 delay is not the same as the Path2 delay.

Then the delay is held for Path2's Dwell Time at which point a new delay is randomly selected for Path2 from its delay group such that Path2 delay is not the same as the Path1 delay. The sequence repeats for the duration of the fading simulation.

 

When you select Birth Death in the Master Setup view as the fader profile, parameters for Minimum Delay, Maximum Delay, Delay Bin Spacing, and Dwell Time are displayed for editing, if desired.

 

Moving Propagation

There are two paths per channel. The paths are non-faded with equal strength and equal phases. One path is static (Pi) and the other path is moving (P1). The delay of a Moving Propagation Path varies over time and is a function of the Offset, Variation, and Period parameters. ClosedDetails...

Referencing 3GPP TS 25.141 V8.3.0 (2008-05) Annex D.3 Moving propagation conditions.

 

The delay as a function of time T is given by the following equation:

Dt = Offset + Variation/2 (1 + sin( 2 x PI x T/ Period))

When you select Moving Propagation in the Master Setup view as the fader profile, Delay, Delay Variation, and the Delay Variation Period can be set in the fader path columns.