User`s guide

FIR Interpolation
5-201
•Maintain input frame size
The block generates the output at the faster (interpolated) rate by using a
proportionally shorter frame period at the output port than at the input port.
For interpolation by a factor of L, the output frame period is L times shorter
than the input frame period (T
fo
=T
fi
/L), but the input and output frame
sizes are equal.
The example below shows a single-channel input with a frame period of 1
second (
Sample time = 1/64 and Samples per frame = 64 in the Signal
From Workspace block) being interpolated by a factor of 4 to a frame period
of 0.25 seconds. The input and output frame sizes are identical.
•
Maintain input frame rate
The block generates the output at the faster (interpolated) rate by using a
proportionally larger frame size than the input. For interpolation by a factor
of L, the output frame size is L times larger than the input frame size
(M
o
=M
i
∗L), but the input and output frame rates are equal.
The example below shows a single-channel input of frame size 16 being
interpolated by a factor of 4 to a frame size of 64. The block’s input and
output frame rates are identical.