Digital Signal Processing Reference
In-Depth Information
A
-pulse is directed at three different low-pass types with the same cut-off frequency
(100 Hz) and of the 10th order. Remember that the one-off
δ
δ
-pulse contains all the
frequencies from 0 to
∝
with the same amplitude.
(a)
What frequencies can the pulse responses only contain? What features of the filters
can you deduce from the different pulse responses h(t)?
(b)
The frequency domain of the pulse response apparently gives the "filter curve" and
the frequency response of the filters. Why?
(c)
Why is the length of the lower pulse response much greater than that of the other
pulse responses? What does this mean from the point of view of the
UP
?
(d)
Design this circuit using DASY
Lab
and carry out the experiments.
