概述
dfilt.delay
Delay filter
Syntax
Hd = dfilt.delay
Hd = dfilt.delay(latency)
Description
Hd = dfilt.delay returns a
discrete-time filter, Hd, of type delay, which
adds a single delay to any signal filtered with Hd. The filtered
signal has its values shifted by one sample.
Hd = dfilt.delay(latency) returns
a discrete-time filter, Hd, of type delay,
which adds the number of delay units specified in latency to any
signal filtered with Hd. The filtered signal has its values
shifted by the latency number of samples. The values that appear
before the shifted signal are the filter states.
Examples
Create a delay filter with a latency of 4 and
filter a simple signal to view the impact of applying a delay.
h = dfilt.delay(4)
h =
FilterStructure: 'Delay'
Latency: 4
PersistentMemory: false
sig = 1:7 % Create some simple signal data
sig =
1 2 3 4 5 6 7
states = h.states % Filter states before filtering
states =
0
0
0
0
filter(h,sig) % Filter using the delay filter
ans =
0 0 0 0 1 2 3
states=h.states % Filter states after filtering
states =
4
5
6
7
Introduced before R2006a
最后
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