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1.
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T
h
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ti
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s
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d
life
d
etec
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th
q
u
ak
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d
eb
r
is
[
1
]
.
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r
o
wav
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d
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p
p
ler
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r
s
[
2
]
h
a
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tly
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ase,
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ased
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ased
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r
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K
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[
3
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clea
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[
5
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ex
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el
o
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h
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m
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et
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=
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1
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est
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r
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ican
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en
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Dis
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en
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1
1
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1
5
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,
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A
R
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(
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is
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
d
o
n
esian
J
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g
&
C
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m
p
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N:
2502
-
4
7
5
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xp
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2
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u
r
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s
3
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a)
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d
3
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b
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s
h
o
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ch
est
an
d
ab
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m
en
aliv
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ig
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als
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u
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3
(
b
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s
h
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p
lace
m
en
ts
b
y
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d
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all
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els
[
1
6
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-
[
1
8
]
.
Fig
u
r
e
4
s
h
o
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e
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en
s
ity
f
u
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ctio
n
al
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eo
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y
(
DFT
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f
r
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o
r
d
ed
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ig
n
als.
I
t
was
o
b
s
er
v
ed
in
DFT
o
f
ab
d
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e
n
b
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n
g
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ig
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m
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eq
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T
h
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ates
th
at
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d
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p
lace
m
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o
f
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d
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s
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at
th
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[
1
9
]
-
[
23]
.
W
e
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t
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m
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en
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M=
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ir
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t
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ar
m
o
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ic
(
f
u
n
d
am
en
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f
r
eq
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e
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cy
)
a
n
d
th
e
2
nd
h
ar
m
o
n
ic
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en
(
5
)
b
ec
o
m
es
.
(
,
)
=
(
−
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−
(
1
+
1
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⋅
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in
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2
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2
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4
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6
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a)
(
b
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u
r
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3
.
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ig
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r
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e
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Fig
u
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4
.
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ier
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7
)
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,
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,
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)
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m
2
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ier
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s
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m
(
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ca
n
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e
:
(
,
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∫
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(
,
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/
2
(
8
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T
h
e
2
-
D
Fo
u
r
ier
T
r
a
n
s
f
o
r
m
(
,
)
c
an
b
e
wr
itten
as
:
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
5
0
2
-
4
7
5
2
I
n
d
o
n
esian
J
E
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p
Sci,
Vo
l.
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,
No
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2
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er
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1
:
8
2
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-
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828
(
,
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(
(
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9
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w
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(
)
r
ep
r
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ts
in
th
e
s
h
o
r
t t
im
e
o
f
th
e
c
o
r
r
elate
d
Fo
u
r
ier
t
r
an
s
f
o
r
m
o
u
tp
u
t
:
1
=
∑
+
∞
=
−
∞
(
1
)
−
2
(
1
0
)
2
=
∑
+
∞
=
−
∞
(
1
)
−
2
(
1
1
)
3
=
∑
+
∞
=
−
∞
(
2
)
−
2
(
2
)
(
1
2
)
w
h
er
e
=
2
an
d
∑
=
−
∞
+
∞
(
)
−
2
=
−
s
i
n
(
2
)
is
B
e
s
s
el
Fu
n
ctio
n
s
o
f
o
r
d
er
n
.
Af
ter
s
im
p
lific
atio
n
it is
s
h
o
wn
th
at
at
=
0
:
(
,
0
)
=
∑
+
∞
]
.
=
−
∞
(
−
(
+
)
−
(
2
)
)
(
1
3
)
w
h
er
e
:
=
∫
+
∞
−
∞
(
)
(
1
)
(
1
)
(
2
)
(
1
4
)
Fu
r
th
er
m
o
r
e
ca
n
b
e
ev
alu
ated
u
s
in
g
m
ea
n
v
alu
e
th
e
o
r
em
as
:
≈
Δ
⋅
(
1
)
(
)
(
2
)
(
)
(1
5
)
T
h
e
Δ
is
p
u
ls
e
b
an
d
wid
th
.
I
n
(
1
5
)
s
tates
th
at
th
e
s
lo
w
tim
e
s
p
ec
tr
u
m
co
n
tain
s
s
p
ec
tr
al
lin
es
at
f
r
eq
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e
n
cies
o
f
h
ar
m
o
n
ics f
o
r
b
r
ea
th
in
g
f
r
eq
u
en
cy
as it is d
is
cr
ete.
4.
RE
SU
L
T
S
A
ND
D
IS
CU
SS
I
O
N
A
twen
ty
s
ix
-
y
ea
r
-
o
ld
g
u
y
r
e
m
ain
ed
m
o
tio
n
less
in
th
e
s
p
ac
e
b
eh
in
d
th
e
wall
f
ir
s
t
s
tu
d
y
.
A
n
atu
r
ally
b
r
ea
th
in
g
m
an
'
s
r
ea
ctio
n
was
r
ec
o
r
d
e
d
o
v
er
a
2
0
-
s
ec
o
n
d
cy
cle
wh
en
th
e
m
an
was
s
tan
d
in
g
s
till
.
T
h
e
f
a
ct
th
at
a
ch
est
o
f
h
u
m
an
m
o
v
es
p
r
o
d
u
ce
s
d
if
f
er
i
n
g
r
ad
ar
p
r
o
ce
ed
s
with
v
ar
i
o
u
s
b
ac
k
-
s
ca
tter
in
g
am
p
litu
d
es
is
well
estab
lis
h
ed
.
A
d
im
en
s
io
n
al
m
o
d
el
was
cr
ea
ted
b
y
r
e
m
o
v
in
g
th
e
s
ce
n
e'
s
s
eq
u
en
tial
r
an
g
e
p
r
o
f
iles
in
o
r
d
er
to
p
lo
t
th
is
s
h
if
t
in
th
e
s
ettin
g
.
S
tatic
ar
tef
ac
ts
.
T
h
e
r
ad
ar
im
a
g
es
d
is
p
lay
ed
in
Fig
u
r
e
5
ar
e
th
e
p
r
o
d
u
ct
o
f
th
is
s
h
if
t
d
etec
tio
n
p
r
o
ce
s
s
.
T
h
e
b
r
ea
th
in
g
m
a
n
'
s
tim
e
-
v
ar
y
in
g
d
if
f
er
en
tia
l
r
an
g
e
-
p
r
o
f
iles
ar
e
th
en
s
eq
u
en
tially
s
h
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wn
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cr
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te
a
2
D
d
iag
r
am
,
as
s
ee
n
in
Fig
u
r
e
5
(
a
)
.
Fo
r
all
tim
e
in
s
tan
ts
in
th
e
s
n
ap
s
h
o
t,
ch
an
g
es
ac
r
o
s
s
th
e
3
0
cm
r
a
n
g
e
d
i
s
tan
ce
ca
n
b
e
e
asil
y
id
en
tifie
d
[
2
4
]
,
[
25]
.
T
h
e
an
s
wer
at
3
0
cm
r
an
g
e
is
d
ep
icted
in
Fig
u
r
e
5
(
b
)
in
r
e
latio
n
to
th
e
o
b
s
er
v
ed
tim
e
p
er
io
d
.
T
h
e
f
ig
u
r
e
s
h
o
ws
a
to
tal
o
f
7
b
r
ea
th
in
g
s
(
o
v
e
r
a
1
6
-
s
ec
o
n
d
p
er
i
o
d
)
,
wh
ic
h
is
co
m
p
atib
le
with
n
o
m
in
al
b
r
ea
th
in
g
v
alu
es
f
o
r
a
s
af
e
p
e
r
s
o
n
.
T
h
e
m
o
n
ito
r
in
g
o
f
h
ea
r
tb
ea
ts
was
th
e
s
u
b
ject
o
f
th
e
s
ec
o
n
d
s
tu
d
y
.
Fo
r
th
is
r
ea
s
o
n
,
th
e
in
d
iv
id
u
al
s
to
o
d
s
till
f
o
r
1
6
s
ec
o
n
d
s
ju
s
t b
eh
in
d
th
e
wall,
k
ee
p
in
g
h
is
b
r
ea
th
.
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5.
CO
NCLU
SI
O
N
I
n
th
is
ar
ticle,
we
h
a
v
e
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f
e
ctiv
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illu
s
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th
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p
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o
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tify
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n
s
y
m
p
to
m
s
v
ia
th
e
wall.
T
h
e
s
u
g
g
ested
p
r
o
c
ed
u
r
e,
w
h
ich
em
p
lo
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s
a
s
h
if
t
d
etec
tio
n
alg
o
r
ith
m
,
s
u
cc
ess
f
u
lly
id
en
tifie
s
a
n
d
lo
ca
tes
th
e
h
u
m
an
'
s
lo
ca
tio
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a
s
well
as
p
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io
d
ic
b
r
ea
th
in
g
a
n
d
p
u
ls
e
m
o
tio
n
.
T
h
e
f
in
d
i
n
g
s
o
f
th
e
e
x
p
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im
en
t
d
em
o
n
s
tr
ate
th
at
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e
b
r
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th
i
n
g
an
d
p
u
ls
e
s
p
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d
s
d
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ted
ar
e
in
lin
e
with
n
o
m
in
al
v
alu
es f
o
r
a
s
af
e
in
d
iv
i
d
u
al.
Ou
r
p
r
o
ce
s
s
is
h
ig
h
ly
ac
cu
r
at
e
an
d
s
im
p
le
to
u
s
e.
T
h
is
tec
h
n
iq
u
e
ca
n
q
u
ick
l
y
b
e
ap
p
lied
to
f
in
d
s
u
r
v
iv
o
r
s
tr
ap
p
ed
u
n
d
e
r
d
is
aster
d
eb
r
is
a
n
d
o
th
e
r
r
elate
d
u
s
es
.
RE
F
E
R
E
NC
E
S
[1
]
D.
D.
F
e
rris
,
a
n
d
N.
C.
Cu
rrie,
“
S
u
rv
e
y
o
f
c
u
rre
n
t
tec
h
n
o
lo
g
ies
fo
r
th
r
o
u
g
h
-
t
h
e
-
wa
ll
su
rv
e
il
la
n
c
e
(TW
S
),
”
Pro
c
.
S
PIE
,
1
9
9
9
,
v
o
l.
3
5
7
7
,
p
p
.
6
2
-
7
2
,
d
o
i
:
1
0
.
1
1
1
7
/
1
2
.
3
3
6
9
8
8
.
[2
]
S
.
I.
Iv
a
sh
o
v
,
V.
V.
Ra
z
e
v
ig
,
A
.
P
.
S
h
e
y
k
o
,
a
n
d
I.
A.
Va
sily
e
v
,
“
De
tec
ti
o
n
o
f
h
u
m
a
n
b
re
a
th
i
n
g
a
n
d
h
e
a
rtb
e
a
t
b
y
re
m
o
te rad
a
r,
”
In
Pro
g
re
ss
in
E
lec
tro
ma
g
n
e
ti
c
Res
e
a
rc
h
S
y
mp
o
siu
m
,
2
0
0
4
,
p
p
.
6
6
3
-
6
6
6
.
[3
]
T
.
P
a
rd
h
u
a
n
d
V.
K
u
m
a
r,
“
Re
d
u
c
ti
o
n
o
f
Clu
tt
e
r
u
sin
g
TW
I
Ult
ra
wid
e
b
a
n
d
Im
a
g
in
g
,
”
In
t
.
J.
Ultra
W
id
e
b
a
n
d
Co
mm
u
n
ica
ti
o
n
a
n
d
S
y
ste
ms
,
v
o
l.
3
,
n
o
.
2
,
p
p
.
1
0
1
-
1
0
6
,
2
0
1
5
.
[4
]
E.
T.
Ro
se
n
b
u
r
y
,
“
Ha
n
d
h
e
ld
i
n
st
ru
m
e
n
t
c
a
p
a
b
le
o
f
m
e
a
su
rin
g
h
e
a
rtb
e
a
t
a
n
d
b
re
a
th
in
g
m
o
ti
o
n
a
t
a
d
istan
c
e
,
”
U.S
.
Pa
ten
t
,
2
0
1
1
.
[5
]
J.
Li,
Z.
Zen
g
,
J.
S
u
n
,
a
n
d
F.
Li
u
,
“
Th
ro
u
g
h
–
Wall
De
tec
ti
o
n
o
f
Hu
a
m
n
b
e
in
g
’s
M
o
v
e
n
ts
b
y
UWB
R
AD
AR
,
”
IEE
E
Ge
o
S
c
ien
c
e
a
n
d
Rem
o
te S
e
n
si
n
g
L
e
tt
e
rs
, v
ol
.
9
,
n
o
.
6,
2
0
1
2
,
d
o
i:
1
0
.
1
1
0
9
/L
G
RS
.
2
0
1
2
.
2
1
9
0
7
0
7
.
[6
]
T
.
P
a
rd
h
u
a
n
d
V.
K
u
m
a
r,
“
An
I
n
v
e
stig
a
ti
o
n
o
f
H
u
m
a
n
Id
e
n
t
ifi
c
a
ti
o
n
Be
h
in
d
t
h
e
wa
ll
,
”
J
o
u
r
o
d
A
d
v
Res
e
a
rc
h
in
Dy
n
a
mic
a
l
&
C
o
n
tro
l
S
y
ste
ms
,
v
o
l.
10
,
n
o
.
5
,
p
p
.
1
2
2
-
1
2
9
,
2
0
1
8
.
[7
]
T
.
P
a
rd
h
u
,
a
n
d
V.
Ku
m
a
r,
“
Im
p
le
m
e
n
tatio
n
o
f
TW
I
u
sin
g
UWB
RAD
AR
S
ig
n
a
ls
,
”
In
Pro
c
e
e
d
in
g
s
o
f
In
te
rn
a
ti
o
n
a
l
Co
n
fer
e
n
c
e
o
n
A
p
p
l
ica
ti
o
n
s
o
f
S
o
ft
Co
m
p
u
ti
n
g
T
e
c
h
n
iq
u
e
s
in
E
n
g
i
n
e
e
rin
g
&
T
e
c
h
n
o
l
o
g
y
,
2
0
1
6
,
d
o
i:
1
0
.
1
0
4
9
/cp
.
2
0
1
6
.
1
4
9
6
.
[8
]
L.
M
.
H.
Ula
n
d
e
r
e
t
a
l
.
,
“
C
h
a
n
g
e
d
e
tec
ti
o
n
o
f
v
e
h
icle
-
siz
e
d
targ
e
ts
in
fo
re
st
c
o
n
c
e
a
lme
n
t
u
sin
g
VH
F
-
a
n
d
UH
F
-
b
a
n
d
S
AR,”
IEE
E
Aer
o
sp
a
c
e
a
n
d
E
lec
tro
n
ic
S
y
ste
ms
M
a
g
a
zin
e
,
v
o
l
.
2
6
,
n
o
.
7
,
p
p
.
3
0
-
3
6
,
2
0
1
1
,
d
o
i:
1
0
.
1
1
0
9
/RADA
R.
2
0
1
0
.
5
4
9
4
4
6
3
.
[9
]
P.
R
u
n
k
le,
L.
H.
Ng
u
y
e
n
,
J.
H.
M
c
Clellan
,
a
n
d
L.
Ca
rin
,
“
M
u
lt
i
-
a
sp
e
c
t
targ
e
t
d
e
tec
ti
o
n
f
o
r
S
AR
ima
g
e
ry
u
si
n
g
h
id
d
e
n
M
a
r
k
o
v
m
o
d
e
ls,”
IEE
E
T
ra
n
sa
c
ti
o
n
s
o
n
Ge
o
sc
ien
c
e
a
n
d
Rem
o
te
S
e
n
si
n
g
,
v
o
l.
3
9
,
n
o
.
1
,
p
p
.
4
6
-
55,
2
0
0
1
,
d
o
i:
1
0
.
1
1
0
9
/3
6
.
8
9
8
6
6
4
.
[1
0
]
M.
A.
G
o
n
z
a
lez
-
Hu
ici
a
n
d
F.
G
io
v
a
n
n
e
sc
h
i,
“
A
c
o
m
b
i
n
e
d
stra
teg
y
fo
r
lan
d
m
i
n
e
d
e
tec
ti
o
n
a
n
d
i
d
e
n
ti
fica
ti
o
n
u
si
n
g
sy
n
th
e
ti
c
G
P
R
re
sp
o
n
se
s,”
J
o
u
rn
a
l
o
f
Ap
p
li
e
d
Ge
o
p
h
y
sic
s
,
v
o
l.
9
9
,
2
0
1
3
,
d
o
i:
1
0
.
1
0
1
6
/j
.
jap
p
g
e
o
.
2
0
1
3
.
0
8
.
0
0
6
.
[1
1
]
F.
Ab
u
jara
d
,
A.
Jo
stin
g
m
e
ier,
a
n
d
A.
S
.
Om
a
r,
“
Clu
tt
e
r
Re
m
o
v
a
l
fo
r
Lan
d
m
i
n
e
u
sin
g
Diffe
re
n
t
S
i
g
n
a
l
P
r
o
c
e
ss
in
g
Tec
h
n
iq
u
e
s,”
In
Pr
o
c
e
e
d
in
g
s o
f
t
h
e
T
e
n
t
h
In
t
e
rn
a
ti
o
n
a
l
C
o
n
fer
e
n
c
e
o
n
Gr
o
u
n
d
s P
e
n
e
tra
ti
n
g
R
a
d
a
r
,
2
0
0
4
.
[1
2
]
X.
Zh
a
n
g
,
X.
Xi,
M
.
Li
,
a
n
d
D.
Wu
,
“
Co
m
p
a
riso
n
o
f
Im
p
u
lse
Ra
d
a
r
a
n
d
S
p
re
a
d
-
S
p
e
c
tru
m
Ra
d
a
r
i
n
Th
r
o
u
g
h
-
Wall
Im
a
g
in
g
,
”
IEE
E
T
r
a
n
s
a
c
ti
o
n
s
o
n
M
icr
o
w
a
v
e
T
h
e
o
ry
a
n
d
T
e
c
h
n
iq
u
e
s
,
v
o
l.
6
4
,
n
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taffo
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3
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