Digital Signal Processing Reference
In-Depth Information
2
2
1
1.5
0
1
−1
0.5
−2
0
−3
0
0.5
1
0
0.5
1
(a) Norm Freq
(b) Norm Freq
2
2
1.5
1
1
0
0.5
−1
0
−0.5
−2
0
0.5
1
0
0.5
1
(c) Norm Freq
(d) Norm Freq
Figure 1.2:
(a) Magnitude of DTFT of the sequence [1 0 1]; (b) Phase response of DTFT; (c) Real
component of DTFT ; (d) Imaginary component of DTFT.
LVxDTF T([1,0,1],[0:1:2],300,2,1,88)
which results in Fig. 1.3.
A second script (for a complete description of input arguments, see exercises below)
LV xDT F T
_
MS(x,SampOffset,FreqOffsetExp,M,R,TimeOpt,FreqOpt)
allows you to enter one sequence, and the second sequence is created as a modification of the first, delayed
by
SampOffset
samples and offset in frequency by the complex exponential
FreqOffsetExp
. Input arguments
M
and
R
are as described for the script
LVxDTFT
;
FreqOpt
determines whether the DTFT is computed
symmetrically or asymmetrically about frequency zero, as described above for the script
LVxDTFT
.For
the asymmetrical time option (determined by the input argument
TimeOpt
), the sequence time indices
of the first sequence are given as
n
=
0
:
1
:
N
−
1
;
