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201
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IJ
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4
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h
ar
m
o
n
ic
s
o
u
r
ce
esti
m
atio
n
h
as
b
ee
n
p
r
o
p
o
s
ed
b
y
u
tili
zi
n
g
t
h
e
h
ar
m
o
n
ic
s
tate
e
s
ti
m
atio
n
(
H
SE)
an
d
B
ay
e
s
ia
n
esti
m
atio
n
.
Un
f
o
r
t
u
n
ate
l
y
,
t
h
is
tec
h
n
iq
u
e
r
eq
u
ir
es
a
h
i
g
h
m
u
ltip
licit
y
in
t
h
e
alg
o
r
it
h
m
a
n
d
v
er
y
e
x
p
en
s
iv
e
co
s
t
to
s
etu
p
th
e
d
is
tr
ib
u
ted
m
ea
s
u
r
e
m
en
t
s
y
s
te
m
s
tatio
n
[
2
3
]
.
B
y
u
s
in
g
a
n
alter
n
ate
m
et
h
o
d
o
lo
g
y
th
at
f
o
cu
s
es
o
n
t
w
o
-
p
o
in
t
m
ea
s
u
r
e
m
e
n
ts
s
tr
ateg
y
,
i
m
p
ed
an
ce
s
i
n
f
o
r
m
atio
n
ca
n
b
e
o
b
tain
ed
b
y
co
m
p
ar
in
g
th
e
d
ata
b
et
w
ee
n
t
h
e
s
u
p
p
l
y
an
d
in
co
m
in
g
o
f
th
e
lo
a
d
u
tili
zi
n
g
f
r
eq
u
e
n
c
y
an
d
p
h
a
s
e
ap
p
r
o
ac
h
[
1
5
]
.
Ho
w
e
v
er
,
th
i
s
tec
h
n
iq
u
e
g
i
v
es
an
ac
cu
r
ate
i
m
p
ed
an
ce
s
in
f
o
r
m
atio
n
,
b
u
t
t
h
en
a
g
ain
it
s
till
ex
p
en
s
iv
e
a
n
d
d
if
f
ic
u
lt
t
o
p
r
ac
tice
[
1
7
]
.
I
n
r
ea
l
tim
e,
t
h
e
ac
cu
r
ac
y
,
q
u
ic
k
esti
m
atio
n
an
d
lo
w
co
s
t
ar
e
i
m
p
o
r
ta
n
t
a
n
d
m
o
s
t
o
f
t
h
e
p
r
ev
io
u
s
s
tu
d
ies
d
id
n
o
t
co
n
s
id
er
th
o
s
e
f
ac
to
r
s
.
B
ased
o
n
ab
o
v
e
d
is
c
u
s
s
io
n
,
t
h
e
li
m
i
t
atio
n
o
f
p
r
ev
io
u
s
tec
h
n
iq
u
es c
an
b
e
o
v
er
co
m
e
u
s
in
g
ti
m
e
-
f
r
e
q
u
en
c
y
d
is
tr
ib
u
tio
n
(
T
FD)
.
T
h
is
p
ap
er
p
r
o
p
o
s
es
a
h
ig
h
ac
cu
r
ac
y
,
f
ast
e
s
ti
m
atio
n
an
d
co
s
ts
e
f
f
icie
n
t
o
f
a
n
e
w
m
u
ltip
le
h
ar
m
o
n
ic
s
o
u
r
ce
s
id
e
n
ti
f
icatio
n
m
et
h
o
d
w
i
th
s
i
n
g
le
-
p
o
i
n
t
m
ea
s
u
r
e
m
en
t
[
8
]
at
t
h
e
P
C
C
u
til
izi
n
g
T
FD
w
h
ich
is
s
p
ec
tr
o
g
r
a
m
.
T
h
e
s
p
ec
tr
o
g
r
am
is
an
ap
p
r
o
p
r
iate
tech
n
iq
u
e
th
at
r
ep
r
esen
t
s
a
s
i
g
n
al
i
n
ti
m
e
an
d
f
r
eq
u
en
c
y
r
ep
r
esen
tatio
n
an
d
k
n
o
w
n
as
ti
m
e
-
f
r
eq
u
en
c
y
r
ep
r
esen
tatio
n
(
T
FR
)
[
8
]
-
[
1
5
]
-
[
1
7
]
.
Fr
o
m
th
ese
t
h
e
s
i
g
n
al
s
,
s
p
ec
tr
al
in
f
o
r
m
at
io
n
ca
n
b
e
m
o
n
ito
r
ed
w
i
th
ch
a
n
g
es o
f
ti
m
e.
T
h
er
ef
o
r
e,
th
e
Sp
ec
tr
o
g
r
a
m
is
a
v
er
y
ap
p
r
o
p
r
iate
m
et
h
o
d
to
id
en
tify
h
ar
m
o
n
ic
s
s
o
u
r
ce
s
.
Fu
r
t
h
er
m
o
r
e,
s
p
ec
tr
al
in
f
o
r
m
a
t
io
n
o
f
th
e
s
y
s
te
m
ca
n
b
e
ex
tr
ac
ted
f
r
o
m
T
FR
in
o
r
d
er
to
id
en
ti
f
y
th
e
s
y
s
te
m
c
h
ar
ac
ter
is
tic
an
d
a
co
m
m
o
n
h
ar
m
o
n
ic
p
r
o
d
u
cin
g
lo
ad
w
h
ic
h
is
in
v
er
ter
w
il
l
b
e
u
s
ed
as
lo
ad
s
i
n
t
h
e
s
y
s
te
m
[
2
]
-
[
3
]
.
Fro
m
t
h
e
T
FR
,
s
p
ec
tr
al
i
m
p
ed
an
ce
s
w
h
i
ch
ar
e
f
u
n
d
a
m
e
n
tal
i
m
p
ed
an
ce
,
Z
1
an
d
h
ar
m
o
n
ic
i
m
p
ed
a
n
ce
,
Z
h
w
ill
b
e
esti
m
ate
d
an
d
ca
lcu
lated
ac
cu
r
atel
y
.
Fin
all
y
,
u
tili
z
in
g
th
e
s
ig
n
i
f
ica
n
t
c
h
ar
ac
ter
is
tic
b
et
wee
n
Z
1
an
d
Z
h
,
th
e
id
en
tific
ati
o
n
o
f
m
u
lt
ip
le
h
ar
m
o
n
ic
s
o
u
r
ce
s
lo
ca
tio
n
ca
n
b
e
r
ea
lized
ac
cu
r
atel
y
.
2.
M
E
T
H
O
D
O
L
O
G
Y
A
s
i
n
g
le
p
o
in
t
-
m
ea
s
u
r
e
m
e
n
t
w
il
l
b
e
i
m
p
le
m
e
n
ted
in
t
h
is
s
t
u
d
y
,
w
h
ile
T
FD
w
h
ich
i
s
s
p
ec
tr
o
g
r
a
m
is
u
s
ed
in
o
r
d
er
to
ex
a
m
i
n
e
an
d
a
n
al
y
s
e
t
h
e
s
i
g
n
al
p
ar
a
m
eter
s
2
.
1
.
Sp
ec
t
ro
g
ra
m
T
h
e
s
p
ec
tr
o
g
r
a
m
i
s
a
o
n
e
o
f
t
h
e
tec
h
n
iq
u
e
i
n
T
FD
a
n
al
y
s
i
s
an
d
r
ep
r
esen
ted
a
d
is
p
er
s
io
n
o
f
s
ig
n
al
en
er
g
y
in
t
i
m
e
-
f
r
eq
u
e
n
c
y
r
ep
r
esen
tatio
n
.
B
y
w
in
d
o
w
i
n
g
t
h
e
s
ig
n
al
at
f
ir
s
t
an
d
a
f
ter
th
at
tak
in
g
t
h
e
Fo
u
r
ier
tr
an
s
f
o
r
m
s
t
h
e
ti
m
e
-
lo
ca
lizati
o
n
ca
n
b
e
o
b
tain
ed
co
r
r
ec
tl
y
.
Fu
r
t
h
er
m
o
r
e,
t
h
is
w
ill
lead
to
t
h
e
r
is
e
o
f
s
h
o
r
t ti
m
e
Fo
u
r
ier
tr
an
s
f
o
r
m
,
(
ST
FT
)
o
r
w
i
n
d
o
w
ed
Fo
u
r
ier
tr
a
n
s
f
o
r
m
.
Fu
r
t
h
er
m
o
r
e,
t
h
e
s
q
u
ar
ed
v
al
u
e
o
f
th
e
ST
FT
is
,
u
s
u
all
y
u
s
ed
i
n
t
h
e
s
i
g
n
a
l
a
n
al
y
s
i
s
w
h
ic
h
ca
lled
a
s
a
s
p
ec
tr
o
g
r
a
m
a
n
d
ca
n
b
e
d
ef
i
n
e
d
as
i
n
E
q
u
atio
n
1
an
d
E
q
u
atio
n
2
[
1
7
]
.
2
2
)
(
)
(
)
,
(
dt
e
t
w
v
f
t
S
f
j
v
(
1
)
2
2
)
(
)
(
)
,
(
dt
e
t
w
i
f
t
S
f
j
i
(
2
)
W
h
er
eb
y
,
w
(
t)
is
o
b
s
er
v
atio
n
w
i
n
d
o
w
s
.
T
h
e
Han
n
i
n
g
w
in
d
o
w
is
s
elec
ted
w
i
th
r
esp
ec
t
to
I
E
C
s
tan
d
ar
d
th
at
ch
ar
ac
ter
ized
th
is
w
i
n
d
o
w
i
s
s
u
itab
le
f
o
r
an
al
y
zi
n
g
h
ar
m
o
n
ic
[
3
]
an
d
also
b
e
ch
o
s
en
d
u
e
to
its
lo
w
er
p
ea
k
s
id
e
lo
p
e
w
h
ich
h
a
s
th
e
n
ar
r
o
w
e
f
f
ec
t
o
n
o
t
h
er
f
r
eq
u
e
n
cie
s
ar
o
u
n
d
f
u
n
d
a
m
e
n
tal
v
alu
e
a
n
d
o
th
er
f
r
eq
u
e
n
c
y
co
m
p
o
n
e
n
t
s
.
T
h
e
s
p
ec
tr
o
g
r
a
m
i
s
u
s
ed
in
n
u
m
er
o
u
s
ap
p
licatio
n
s
an
d
g
e
n
er
all
y
u
til
ized
as
an
in
itial
in
v
e
s
ti
g
ati
v
e
i
n
s
tr
u
m
e
n
t a
s
i
t h
as th
e
p
r
o
p
er
ty
o
f
n
o
n
-
p
r
o
d
u
ci
n
g
cr
o
s
s
-
ter
m
p
ar
a
m
eter
s
o
f
T
FD [
4
]
-
[
5
]
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
J
PEDS
I
SS
N:
2088
-
8
694
A
n
I
mp
r
o
ve
d
o
f Mu
ltip
le
Ha
r
mo
n
ic
S
o
u
r
ce
s
I
d
e
n
tifi
ca
tio
n
i
n
Dis
tr
ib
u
tio
n
S
ystem
w
ith
…
(
M.H.
Jo
p
r
i
)
1357
2.
2
.
P
rinciple o
f
P
ro
po
s
ed
M
et
ho
do
lo
g
y
T
h
e
i
m
p
le
m
e
n
tatio
n
f
o
r
m
u
lti
p
le
h
ar
m
o
n
ic
s
o
u
r
ce
s
id
en
tifi
ca
tio
n
ca
n
b
e
r
ea
lized
as
d
e
m
o
n
s
tr
ate
i
n
Fig
u
r
e
1
a
n
d
w
i
th
I
E
E
E
4
-
b
u
s
tes
t
f
ee
d
er
ca
s
e
s
as
s
h
o
w
in
Fi
g
u
r
e
2
.
T
h
er
e
ar
e
f
o
u
r
co
n
d
itio
n
co
n
s
id
er
ed
i
n
th
e
s
i
m
u
latio
n
w
it
h
r
ef
er
r
in
g
t
o
th
e
m
ea
s
u
r
e
m
en
t p
o
in
t a
t th
e
P
C
C
as f
o
llo
w
s
:
a.
No
h
ar
m
o
n
ic
s
o
u
r
ce
s
w
i
th
i
n
t
h
e
d
is
tr
ib
u
tio
n
s
y
s
te
m
.
b.
A
d
o
w
n
s
tr
ea
m
,
w
h
e
n
th
e
h
ar
m
o
n
ic
s
o
u
r
ce
s
lo
ca
ted
at
a
cu
s
to
m
er
s
id
e
c.
B
o
th
s
tr
ea
m
,
w
h
en
th
e
h
ar
m
o
n
ic
s
o
u
r
ce
s
lo
ca
ted
at
u
tili
t
y
an
d
cu
s
to
m
er
s
id
e.
W
h
er
eb
y
,
th
is
is
th
e
co
m
m
o
n
s
ce
n
ar
io
in
p
r
ac
tice.
d.
An
u
p
s
tr
ea
m
,
w
h
ic
h
is
m
ea
n
s
th
e
h
ar
m
o
n
ic
s
o
u
r
ce
s
lo
ca
ted
at
th
e
u
t
ilit
y
s
id
e.
I
n
ad
d
itio
n
,
t
h
e
s
o
u
r
ce
d
etec
ti
o
n
is
u
s
in
g
t
h
e
s
in
g
le
-
p
o
in
t
m
ea
s
u
r
e
m
en
t
ap
p
r
o
ac
h
at
P
C
C
[
2
8
]
.
T
h
e
m
ea
s
u
r
e
m
e
n
t
d
ata
w
ill
b
e
a
n
a
l
y
ze
d
b
y
s
p
ec
tr
o
g
r
a
m
a
n
d
s
i
g
n
al
p
ar
a
m
eter
s
o
f
t
h
e
p
o
w
er
s
y
s
te
m
ar
e
e
s
ti
m
ated
f
r
o
m
th
e
ti
m
e
f
r
eq
u
e
n
c
y
r
ep
r
esen
tat
io
n
(
T
FR
)
.
Fin
all
y
,
th
e
h
ar
m
o
n
ic
s
o
u
r
ce
s
lo
ca
tio
n
ar
e
id
en
tif
ied
b
ased
o
n
th
e
s
i
g
n
if
ican
t
r
elatio
n
s
h
ip
b
etw
ee
n
f
u
n
d
a
m
e
n
tal
i
m
p
ed
an
ce
,
Z
1
an
d
h
ar
m
o
n
ic
i
m
p
ed
an
ce
,
Z
h.
Fig
u
r
e
1
.
C
ase
1
Fig
u
r
e
2
.
C
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I
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PEDS
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694
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en
tify
i
n
g
th
e
lo
ca
t
io
n
o
f
MH
S
i
n
d
is
tr
ib
u
tio
n
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y
s
te
m
s
.
B
ased
o
n
T
ab
le
1
,
m
u
ltip
le
h
ar
m
o
n
ic
s
o
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r
ce
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i
n
t
h
e
p
o
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y
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te
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n
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ca
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d
is
t
i
n
g
u
i
s
h
ed
clea
r
l
y
as
f
o
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w
:
a.
I
f
t
h
e
m
ag
n
it
u
d
e
o
f
h
ar
m
o
n
ic
i
m
p
ed
an
ce
s
,
Z
h
is
0
o
h
m
,
t
h
er
e
is
n
o
h
ar
m
o
n
ic
p
r
o
d
u
cin
g
lo
ad
in
t
h
e
s
y
s
te
m
.
b.
I
f
th
e
m
a
g
n
it
u
d
e
o
f
th
e
f
u
n
d
a
m
en
tal
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m
p
ed
an
ce
,
Z
1
is
g
r
ea
t
er
th
an
h
ar
m
o
n
ic
i
m
p
ed
a
n
ce
s
,
Z
h
th
er
e
is
h
ar
m
o
n
ic
p
r
o
d
u
cin
g
lo
ad
at
d
o
w
n
s
tr
ea
m
.
c.
I
f
t
h
e
m
ag
n
i
t
u
d
e
o
f
f
u
n
d
a
m
e
n
tal
i
m
p
ed
an
ce
,
Z
1
is
lo
w
er
th
an
h
ar
m
o
n
ic
i
m
p
ed
an
ce
s
,
Z
h
t
h
er
e
ar
e
h
ar
m
o
n
ic
p
r
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d
u
cin
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ad
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at
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p
s
tr
ea
m
an
d
d
o
w
n
s
tr
ea
m
.
d.
I
f
th
e
m
a
g
n
itu
d
e
o
f
f
u
n
d
a
m
e
n
tal
i
m
p
ed
an
ce
,
Z
1
is
eq
u
a
l
w
it
h
h
ar
m
o
n
ic
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m
p
ed
a
n
ce
s
,
Z
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t
h
er
e
is
h
ar
m
o
n
ic
p
r
o
d
u
cin
g
lo
ad
at
u
p
s
tr
ea
m
.
C
o
n
s
eq
u
en
tl
y
,
co
n
s
id
er
in
g
t
h
e
ex
p
lan
atio
n
,
th
e
s
p
ec
tr
o
g
r
a
m
tec
h
n
iq
u
e
ca
n
b
e
u
s
ed
ac
cu
r
atel
y
i
n
o
b
tain
in
g
t
h
e
s
ig
n
i
f
ica
n
t
s
p
ec
tr
al
i
m
p
ed
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ce
s
c
h
ar
ac
ter
is
t
ic
in
o
r
d
er
to
d
is
ti
n
g
u
i
s
h
t
h
e
h
ar
m
o
n
ic
s
o
u
r
ce
s
lo
ca
tio
n
in
t
h
e
s
y
s
te
m
.
I
n
ad
d
i
tio
n
,
th
e
p
r
o
p
o
s
ed
m
et
h
o
d
ca
n
b
e
r
ea
d
ily
u
s
ed
in
p
r
ac
tice.
ACK
NO
WL
E
D
G
E
M
E
NT
S
T
h
is
r
esear
ch
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s
u
p
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o
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ted
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y
A
d
v
a
n
ce
Di
g
ital
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g
n
al
P
r
o
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ess
i
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g
L
ab
o
r
ato
r
y
(
A
DSP
L
a
b
)
.
Sp
ec
ial
th
an
k
s
al
s
o
to
t
h
e
Fac
u
lt
y
o
f
E
lectr
ical
E
n
g
i
n
ee
r
i
n
g
an
d
E
n
g
i
n
ee
r
i
n
g
T
ec
h
n
o
lo
g
y
o
f
Un
i
v
er
s
iti
T
ek
n
i
k
al
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la
y
s
ia
Me
la
k
a
(
UT
eM
)
,
Min
i
s
tr
y
o
f
Hi
g
h
er
E
d
u
ca
tio
n
Ma
la
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s
ia
(
MO
HE
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an
d
M
in
is
tr
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f
Scie
n
ce
,
T
ec
h
n
o
lo
g
y
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d
I
n
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v
atio
n
(
MO
ST
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f
o
r
g
i
v
in
g
th
e
co
o
p
er
atio
n
an
d
f
u
n
d
in
g
f
o
r
t
h
is
r
esear
ch
w
i
th
g
r
a
n
t
n
u
m
b
er
0
6
-
01
-
14
-
SF
0
0
1
1
9
L
0
0
0
2
5
.
T
h
eir
s
u
p
p
o
r
t is g
r
ate
f
u
l
l
y
ac
k
n
o
w
led
g
ed
RE
F
E
R
E
NC
E
S
[1
]
G
.
D’
A
n
to
n
a
,
C.
M
u
sc
a
s,
a
n
d
S
.
S
u
li
s,
“
L
o
c
a
li
z
a
ti
o
n
o
f
No
n
li
n
e
a
r
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o
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d
s
in
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e
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tri
c
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ste
m
s
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h
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o
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g
h
Ha
rm
o
n
ic
S
o
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rc
e
Esti
m
a
ti
o
n
”
,
IE
EE
T
r
a
n
s.
In
stru
m.
M
e
a
s
.
,
v
o
l.
6
0
,
n
o
.
1
0
,
p
p
.
3
4
2
3
–
3
4
3
0
,
Oc
t.
2
0
1
1
.
[2
]
M
.
F
a
rh
o
o
d
n
e
a
,
A
.
M
o
h
a
m
e
d
,
a
n
d
H.
S
h
a
re
e
f
,
“
A
sin
g
le
p
o
in
t
m
e
a
su
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m
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n
t
m
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th
o
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lu
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ti
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n
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u
sto
m
e
r
in
p
o
w
e
r
d
istri
b
u
ti
o
n
sy
ste
m
s
”
,
J
o
u
rn
a
l
o
f
Ap
p
li
e
d
S
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ien
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e
s
,
v
o
l.
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1
,
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o
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2
.
p
p
.
257
–
2
6
5
,
2
0
1
1
.
[3
]
Z.
Yin
,
Y.
S
u
n
,
a
n
d
T
.
Yu
,
“
Ne
w
m
e
th
o
d
s
e
x
p
l
o
ra
ti
o
n
f
o
r
h
a
rm
o
n
ic
so
u
rc
e
d
e
n
ti
fi
c
a
ti
o
n
tec
h
n
o
l
o
g
ies
”
,
DR
P
T
2
0
1
1
-
2
0
1
1
4
t
h
I
n
t.
C
o
n
f
.
El
e
c
tr.
Util
.
De
re
g
u
l.
Re
stru
c
t.
P
o
w
e
r
T
e
c
h
n
o
l
.
,
p
p
.
3
9
9
–
4
0
2
,
2
0
1
1
.
[4
]
A
.
R.
A
b
d
u
ll
a
h
,
N
.
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A
h
m
a
d
,
N.A
.
A
b
id
u
ll
a
h
a
n
d
N.
H.
S
h
a
m
su
d
in
,
“
P
e
rf
o
rm
a
n
c
e
Ev
a
lu
a
ti
o
n
o
f
Re
a
l
P
o
w
e
r
Qu
a
li
ty
Distu
rb
a
n
c
e
s A
n
a
l
y
sis u
sin
g
S
-
tran
sf
o
rm
”
,
Ap
p
l.
M
e
c
h
.
M
a
ter
.
,
v
o
l.
7
5
2
-
7
5
3
,
p
p
.
1
3
4
3
–
1
3
,
2
0
1
5
.
[5
]
G
.
D’
A
n
to
n
a
,
C.
M
u
sc
a
s,
a
n
d
S
.
S
u
li
s,
“
L
o
c
a
li
z
a
ti
o
n
o
f
No
n
li
n
e
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r
L
o
a
d
s
in
El
e
c
tri
c
S
y
ste
m
s
T
h
r
o
u
g
h
Ha
rm
o
n
ic
S
o
u
rc
e
Esti
m
a
ti
o
n
”
,
IE
EE
T
r
a
n
s
.
In
stru
m.
M
e
a
s.,
v
o
l.
6
0
,
n
o
.
1
0
,
p
p
.
3
4
2
3
–
3
4
3
0
,
Oc
t.
2
0
1
1
.
[6
]
M
.
F
a
rh
o
o
d
n
e
a
,
A
.
M
o
h
a
m
e
d
,
a
n
d
H.
S
h
a
re
e
f
,
“
A
sin
g
le
p
o
in
t
m
e
a
su
re
m
e
n
t
m
e
th
o
d
f
o
r
e
v
a
lu
a
ti
n
g
h
a
rm
o
n
ic
c
o
n
tri
b
u
ti
o
n
s o
f
u
ti
li
ty
a
n
d
c
u
sto
m
e
r
in
p
o
w
e
r
d
istri
b
u
ti
o
n
sy
ste
m
s
”
,
J
o
u
rn
a
l
o
f
Ap
p
li
e
d
S
c
ie
n
c
e
s
,
v
o
l.
1
1
,
n
o
.
2
.
p
p
.
257
–
2
6
5
,
2
0
1
1
.
[7
]
Z.
Yin
,
Y.
S
u
n
,
a
n
d
T
.
Yu
,
“
Ne
w
me
th
o
d
s
e
x
p
lo
r
a
ti
o
n
fo
r
h
a
rm
o
n
ic
so
u
rc
e
id
e
n
ti
fi
c
a
t
io
n
tec
h
n
o
lo
g
ies
”
,
DR
P
T
2
0
1
1
-
2
0
1
1
4
t
h
I
n
t.
C
o
n
f
.
El
e
c
tr.
Util
.
De
re
g
u
l.
Re
stru
c
t.
P
o
w
e
r
T
e
c
h
n
o
l
.
,
p
p
.
3
9
9
–
4
0
2
,
2
0
1
1
.
[8
]
A
.
R.
A
b
d
u
ll
a
h
,
N.H
.
A
h
m
a
d
,
N.A
.
A
b
id
u
ll
a
h
a
n
d
N.H.
S
h
a
m
su
d
in
,
“
P
e
rf
o
rm
a
n
c
e
Ev
a
lu
a
ti
o
n
o
f
Re
a
l
P
o
w
e
r
Qu
a
li
ty
Distu
rb
a
n
c
e
s A
n
a
l
y
sis u
sin
g
S
-
tran
sf
o
rm
”
,
Ap
p
l.
M
e
c
h
.
M
a
ter
.
,
v
o
l.
7
5
2
-
7
5
3
,
p
p
.
1
3
4
3
–
1
3
,
2
0
1
5
.
[9
]
M
.
F
a
rh
o
o
d
n
e
a
,
A
.
M
o
h
a
m
e
d
,
H.
S
h
a
re
e
f
,
a
n
d
H.
Zay
a
n
d
e
h
ro
o
d
i,
“
A
n
e
n
h
a
n
c
e
d
m
e
th
o
d
f
o
r
c
o
n
tri
b
u
ti
o
n
a
ss
e
ss
m
e
n
t
o
f
u
ti
li
ty
a
n
d
c
u
sto
m
e
r
h
a
rm
o
n
ic
d
isto
r
ti
o
n
s
i
n
ra
d
ial
a
n
d
w
e
a
k
l
y
m
e
sh
e
d
d
istri
b
u
ti
o
n
s
y
ste
m
s
”
,
In
t.
J
.
El
e
c
tr.
Po
we
r E
n
e
rg
y
S
y
st
.
,
v
o
l
.
4
3
,
n
o
.
1
,
p
p
.
2
2
2
–
2
2
9
,
2
0
1
2
.
[1
0
]
A
.
Ba
n
sh
w
a
r
a
n
d
A
.
K.
Ch
a
n
d
e
l
,
“
I
d
e
n
ti
f
ica
ti
o
n
o
f
h
a
rm
o
n
ic
so
u
rc
e
s
u
sin
g
fu
zz
y
lo
g
ic
”
,
in
2
0
1
0
Jo
i
n
t
In
tern
a
t
io
n
a
l
Co
n
f
e
re
n
c
e
o
n
P
o
w
e
r
El
e
c
tro
n
ics
,
Driv
e
s an
d
En
e
rg
y
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y
ste
m
s &
2
0
1
0
P
o
w
e
r
In
d
ia,
2
0
1
0
,
p
p
.
1
–
7.
[1
1
]
Y.
L
iu
,
H.
G
o
n
g
,
X.Y.
X
iao
,
a
n
d
H.
Ya
n
g
,
“
Ha
rm
o
n
ic S
o
u
rc
e
L
o
c
a
ti
o
n
a
t
th
e
Po
i
n
t
o
f
Co
mm
o
n
C
o
u
p
li
n
g
Ba
se
d
o
n
th
e
No
n
li
n
e
a
rity In
d
e
x
o
f
L
o
a
d
”
,
in
2
0
0
9
A
sia
-
P
a
c
if
ic P
o
w
e
r
a
n
d
E
n
e
rg
y
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g
in
e
e
rin
g
Co
n
f
e
re
n
c
e
,
2
0
0
9
,
p
p
.
1
–
5.
[1
2
]
A
.
R.
A
b
d
u
ll
a
h
,
G
.
Z.
P
e
n
g
a
n
d
S
.
A
.
G
h
a
n
i,
“
A
n
e
w
v
e
c
to
r
d
ra
ft
m
e
th
o
d
fo
r
h
a
rm
o
n
ic
so
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rc
e
d
e
tec
t
io
n
a
t
p
o
i
n
t
o
f
c
o
mm
o
n
c
o
u
p
li
n
g
”
,
P
r
o
c
.
2
0
1
4
IEE
E
8
t
h
In
t
.
P
o
w
e
r
En
g
.
Op
ti
m
.
Co
n
f
.
P
EOCO
2
0
1
4
,
n
o
.
M
a
rc
h
,
p
p
.
1
1
0
–
1
1
4
,
2
0
1
4
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d
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sc
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.
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tate
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T
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6
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E.
F
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ra
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M
.
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ra
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y
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d
A
.
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ra
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m
s
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1
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l.
1
9
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3
.
[1
7
]
D.
S
rin
iv
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sa
n
,
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.
S
.
Ng
,
a
n
d
A
.
C.
L
ie
w
,
“
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ra
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0
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8
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,
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A.
Hu
ss
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in
,
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9
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.
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A
b
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ll
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,
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t.
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.
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lec
tr.
En
g
.
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.
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o
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2
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p
p
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4
5
3
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1
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.
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0
]
Y.R.
S
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o
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a
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d
R.
K
.
Ja
rial,
“
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ic S
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.
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1
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.
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p
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2
]
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.
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f
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jf
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r,
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Blaž
ič,
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n
d
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P
a
p
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č
,
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to
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,
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ra
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s.
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r De
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p
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.
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3
]
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ic,
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.
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a
jf
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r,
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P
a
p
ic,
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m
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a
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4
]
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.
E.
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lci
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.
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Ho
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,
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.
A
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.
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li
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.
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7
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.
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.
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M
e
lak
a
(UTe
M
).
M
u
sta
f
a
M
a
n
a
p
wa
s
b
o
rn
in
K
u
a
la
L
u
m
p
u
r,
M
a
lay
si
a
o
n
1
9
7
8
.
He
re
c
e
i
v
e
d
h
is
B.
S
c
f
ro
m
Un
iv
e
rsiti
T
e
c
h
n
o
lo
g
i
M
a
lay
sia
in
2
0
0
0
a
n
d
M
sc
.
in
El
e
c
tri
c
a
l
En
g
in
e
e
rin
g
f
ro
m
Un
iv
e
rsiti
T
e
k
n
ik
a
l
M
a
la
y
sia
M
e
la
k
a
(U
T
e
M
)
2
0
1
6
.
S
in
c
e
2
0
0
6
,
h
e
h
a
s
b
e
e
n
a
n
a
c
a
d
e
m
ia
sta
ff
in
th
e
Un
iv
e
rsiti
T
e
k
n
ik
a
l
M
a
la
y
si
a
M
e
lak
a
(UTe
M
).
His
re
se
a
rc
h
in
tere
sts
a
re
p
o
w
e
r
e
lec
tro
n
ics
a
n
d
d
riv
e
,
i
n
str
u
m
e
n
tatio
n
,
a
n
d
DS
P
a
p
p
li
c
a
ti
o
n
.
M
o
h
d
Ra
h
im
i
b
i
n
Y
u
so
f
f
w
a
s
b
o
rn
i
n
Ke
lan
ta
n
,
M
a
lay
sia
o
n
1
9
6
7
.
He
re
c
e
iv
e
d
h
is
M
.
S
c
.
i
n
El
e
c
tri
c
a
l
En
g
in
e
e
rin
g
f
ro
m
Un
iv
e
rsit
y
o
f
No
tt
in
g
h
a
m
,
En
g
lan
d
in
1
9
9
2
a
n
d
B.
E
n
g
.
i
n
El
e
c
tri
c
a
l
&
El
e
c
tro
n
ics
f
ro
m
Un
iv
e
rsit
y
o
f
Wale
s,
S
wa
n
se
a
,
UK
in
1
9
9
0
.
S
in
c
e
2
0
1
0
,
h
e
h
a
s
b
e
e
n
a
n
a
c
a
d
e
m
ia
sta
f
f
i
n
Un
iv
e
r
siti
Tek
n
ik
a
l
M
a
la
y
sia
M
e
lak
a
(U
T
e
M
)
a
n
d
c
u
rre
n
tl
y
h
o
ld
in
g
th
e
p
o
st
a
s
De
a
n
o
f
F
a
c
u
lt
y
o
f
En
g
in
e
e
rin
g
T
e
c
h
n
o
lo
g
y
.
His
re
se
a
rc
h
in
tere
sts
a
re
p
o
w
e
r
q
u
a
li
t
y
,
sig
n
a
l
p
ro
c
e
ss
in
g
,
a
n
d
DS
P
a
p
p
li
c
a
ti
o
n
.
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