upsample
Upsample discrete-time models
Syntax
sysl = upsample(sys,L)
Description
sysl = upsample(sys,L)
resamples the discrete-time
dynamic system model sys
at a sampling rate that
is L
-times faster than the sample time of sys
(Ts0). L
must
be a positive integer. When sys
is a TF model, H(z), upsample
returns sysl
as H(zL)
with the sample time Ts0 / L
.
The responses of models sys
and sysl
have
the following similarities:
The time responses of
sys
andsysl
match at multiples of Ts0.The frequency responses of
sys
andsysl
match up to the Nyquist frequency π / Ts0.
Note
sysl
has L
times as many
states as sys
.
Examples
Version History
Introduced in R2008b