User`s guide

3 Working with Signals
3-96
The “Latency and Initial Conditions” section of the reference page for
Upsample indicates that the block has zero latency for all multirate operations
in Simulink’s single-tasking mode. To verify this, look at the output from the
simulation,
squeeze(yout)'. The first few samples are shown below.
The first column of
yout is the Simulink time provided by the Digital Clock
block. The four values to the right of each time are the values in the output
frame at that time.
You can see that the first input value appears as the first sample of the first
output frame (at t=0), as expected for zero-latency operation. Running this
model under Simulink’s single-tasking mode therefore eliminates the
17-sample delay that the model experiences under Simulink’s multitasking
mode (for the particular parameter settings in the example).
time
ans =
0 1.0000 0 0 0
0.2500 2.0000 0 0 0
0.5000 3.0000 0 0 0
0.7500 4.0000 0 0 0
1.0000 5.0000 0 0 0
1.2500 6.0000 0 0 0
1.5000 7.0000 0 0 0
1.7500 8.0000 0 0 0
2.0000 9.0000 0 0 0
1st output frame
5th output frame