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[
1
]
o
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r
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is
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tiv
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[
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I
n
[
3
]
M
a
x
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m
um
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k
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l
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ood a
ppr
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c
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I
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[
5
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.
T
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e
p
a
r
a
ti
n
g
a
n
d
e
s
ti
m
a
tin
g
m
u
ltip
le
c
o
c
h
a
n
n
e
l d
ig
ita
l s
i
g
n
a
ls
.
I
t
u
t
i
l
i
zed
t
h
e
t
e
m
p
o
r
al
s
t
r
u
c
t
u
r
e
o
f
d
i
g
i
t
al
s
i
g
n
al
s
f
o
r
d
et
er
m
i
n
i
n
g
ar
r
a
y
r
es
p
o
n
s
e a
n
d
b
i
t
s
eq
u
e
n
ce
f
o
r
each
s
i
g
na
l
.
A
n
o
th
e
r
n
o
v
e
l
a
p
p
r
o
a
c
h
f
o
r
b
lin
d
id
e
n
ti
f
ic
a
tio
n
o
f
M
u
l
tic
ha
n
ne
l
s
ys
t
e
m
s
w
a
s
t
a
ki
ng
F
I
R
f
i
l
t
e
r
s
w
h
i
c
h
u
t
i
l
i
zed
t
h
e co
n
cep
t
o
f
o
r
t
h
o
g
o
n
al
i
t
y
b
et
w
een
s
i
g
n
al
s
an
d
n
o
i
s
e s
u
b
s
p
ace f
o
r
cr
eat
i
n
g
a q
u
ad
r
at
i
c f
o
r
m
w
h
i
c
h
a
f
t
er
m
i
n
i
m
i
zat
i
o
n
y
i
el
d
s
d
es
i
r
ed
es
t
i
m
at
e
s
.
T
h
i
s
w
o
r
k
h
ad
s
o
m
e cer
t
ai
n
ad
v
a
n
t
a
g
e
s
o
v
er
t
h
e p
r
ev
i
o
u
s
w
o
r
k
s
a
n
d
te
c
h
n
o
lo
g
ie
s
p
r
o
p
o
s
e
d
a
s
it b
e
in
g
c
o
m
p
u
ta
tio
n
a
ll
y
e
f
f
ic
ie
n
t i
s
h
a
v
e
n
o
a
p
r
io
r
i r
e
q
u
ir
e
m
e
n
t o
f
e
m
itte
d
s
y
m
b
o
l c
o
r
r
e
la
tio
n
.
T
h
is
m
e
t
h
o
d
h
a
s
a
d
v
a
n
ta
g
e
o
v
e
r
th
e
p
r
e
v
io
u
s
th
a
t it le
a
d
s
to
p
r
e
c
is
e
e
s
ti
m
a
te
s
o
f
ch
an
n
el
co
ef
f
i
ci
e
n
t
s
f
o
r
s
h
o
r
t
d
at
a f
r
a
m
e a
nd
us
e
d
f
o
r
f
a
s
t
c
o
nve
r
ge
nc
e
.
A
n
o
t
h
er
ap
p
r
o
ach
i
n
t
h
e
s
a
m
e
d
i
r
e
c
t
i
o
n
w
a
s
m
a
d
e
b
y [
7
]
f
o
r
s
ync
hr
o
no
us
c
o
c
ha
nne
l
d
i
g
i
t
a
l
s
i
g
na
l
s
u
s
i
n
g a
nt
e
nna
a
r
r
a
y.
T
hi
s
w
o
r
k
t
a
ke
s
i
nt
o
a
c
c
o
unt
I
L
S
E
a
nd
I
L
S
P
a
nd
c
o
nc
l
ud
e
s
t
ha
t
I
L
S
E
c
o
nve
r
ge
s
t
o
a
f
i
xe
d
p
o
i
nt
w
i
t
h f
i
ni
t
e
n
um
be
r
of
ite
r
a
tio
n
s
.
I
t c
a
n
b
e
a
ls
o
u
tili
z
e
d
f
o
r
a
s
y
n
c
h
r
o
n
o
u
s
tr
a
n
s
m
is
s
io
n
a
n
d
m
u
ltip
a
th
c
h
a
n
n
e
l
s
w
i
th
la
r
g
e
d
e
la
y
s
p
r
ead
.
B
e
s
i
de
s
e
x
pl
or
i
ng
t
h
e
m
e
t
h
ods
f
or
bl
i
n
d s
e
pa
r
a
t
i
o
n
t
h
i
s
w
or
k
[
8]
a
l
s
o
h
i
g
h
l
i
gh
t
e
d t
h
e
s
e
m
i
bl
i
n
d
m
et
h
o
d
s
f
o
r
es
t
i
m
at
i
o
n
o
f
ch
an
n
el
s
.
B
ei
n
g
a
s
u
b
s
p
ace
b
as
ed
ap
p
r
o
ach
i
t
u
t
i
l
i
zed
t
h
e
c
y
cl
i
c
p
r
ef
i
x
a
n
d
h
a
s
a
d
v
a
n
ta
g
e
o
f
m
a
in
ta
in
in
g
th
e
c
la
s
s
ic
a
l O
F
D
M
b
a
s
e
d
o
n
C
P
in
s
e
r
tio
n
w
h
ic
h
m
a
k
e
s
it a
p
p
lic
a
b
le
to
a
ll
s
t
an
d
ar
d
m
u
l
t
i
car
r
i
er
s
y
s
t
e
m
s
.
I
t
i
s
v
er
y
p
r
eci
s
e i
n
ca
s
es
w
h
er
e ch
a
n
n
el
f
r
eq
u
e
n
c
y
r
e
s
p
o
ns
e
ha
s
no
z
e
r
o
s
l
o
cat
ed
o
n
a s
u
b
car
r
i
er
.
A
n
o
t
h
er
ap
p
r
o
ach
[
9
]
o
f
B
l
i
n
d
ch
an
n
el
es
t
i
m
at
i
o
n
w
as
al
s
o
f
o
l
l
o
w
ed
i
n
t
h
e s
a
m
e
y
ear
w
h
ic
h
u
ti
liz
e
d
th
e
c
o
n
c
e
p
t o
f
C
y
c
lo
s
ta
tio
n
a
r
it
y
a
s
a
n
a
l
te
r
n
a
ti
v
e
to
f
r
a
c
tio
n
a
l
s
a
m
p
li
n
g
f
o
r
b
lin
d
c
h
a
n
n
e
l
e
s
ti
m
a
tio
n
in
O
F
D
M
s
y
s
t
e
m
s
.
H
er
e ev
e
n
c
h
a
n
n
el
s
w
i
t
h
eq
u
i
s
p
aced
u
n
i
t
ci
r
cl
e zer
o
s
ar
e i
d
en
t
i
f
i
ab
l
e i
n
p
r
e
s
e
nc
e
o
f
a
n
y no
n z
e
r
o
C
P
.
A
l
s
o
i
t
hi
g
hl
i
g
ht
e
d
t
ha
t
t
he
i
m
p
ul
s
e
r
e
s
p
o
n
s
e
s
ho
r
t
e
ni
n
g
va
r
i
e
s
w
i
t
h c
ha
nne
l
an
d
can
b
e al
t
er
ed
b
y
c
h
an
g
i
n
g
t
h
e
s
h
o
r
t
en
i
n
g
p
ar
a
m
et
er
s
.
A
ll t
h
e
p
r
e
v
i
o
u
s
w
o
r
k
s
as
s
u
m
ed
a p
er
f
ect
C
h
an
n
el
s
t
a
t
e
I
n
f
o
r
m
at
i
o
n
(
C
S
I
)
t
o
ex
t
r
ac
t
s
y
m
b
o
l
es
t
i
m
at
es
w
h
i
c
h
r
e
s
u
l
t
ed
i
n
a l
o
s
s
o
f
p
er
f
o
r
m
a
n
ce
w
h
i
c
h
w
a
s
n
o
t
o
p
t
i
m
al
h
en
ce
an
i
t
er
at
i
v
e M
a
x
i
m
u
m
lik
e
li
h
o
o
d
s
e
q
u
e
n
tia
l e
s
ti
m
a
ti
o
n
w
a
s
u
s
e
d
[
1
0
]
w
h
ic
h
u
s
e
d
a
n
E
M
(
E
x
p
e
c
ta
tio
n
m
ax
i
m
i
zat
i
o
n
)
ap
p
r
o
ach
w
h
i
c
h
co
n
v
er
g
es
r
ap
i
d
l
y
f
o
r
q
u
as
i
s
t
at
i
c a
n
d
n
o
n
s
t
at
i
c
f
ad
i
n
g
ch
a
n
n
el
s
w
h
i
l
e p
er
f
o
r
m
an
ce
w
a
s
s
i
m
i
l
ar
t
o
N
L
ap
p
r
o
ach
w
i
t
h
p
er
f
ect
C
S
I
.
I
n
t
h
e
f
u
r
t
h
er
co
u
r
s
e
o
f
t
i
m
e
t
h
e
M
L
ap
p
r
o
ach
o
f
d
et
ect
i
o
n
an
d
d
eco
d
i
n
g
w
as
e
xt
e
nd
e
d
t
o
va
r
i
o
us
I
nt
er
f
er
e
n
ce co
n
d
i
t
i
o
n
s
[
1
1
]
an
d
i
n
f
o
r
m
at
i
o
n
t
r
a
n
s
f
er
f
r
o
m
S
T
C
d
et
ect
o
r
t
o
an
er
r
o
r
co
r
r
ect
i
n
g
ch
a
n
n
el
d
eco
d
er
.
A
l
l
t
h
e p
r
ev
i
o
u
s
w
o
r
k
s
as
s
u
m
ed
t
h
e ch
a
n
n
el
s
t
o
b
e s
t
o
ch
a
s
t
i
c
b
u
t
t
h
i
s
w
o
r
k
m
ak
e
its
e
l
f
d
is
tin
c
t
b
y
c
o
n
c
lu
s
io
n
o
f
a
d
e
te
r
m
i
n
i
s
tic
C
h
a
n
n
e
l
m
o
d
e
l
w
h
ic
h
ha
s
a
d
va
n
t
a
ge
s
i
n
r
e
c
e
i
ve
r
d
e
s
i
gn
b
y
d
ev
el
o
p
i
n
g
i
n
t
er
f
er
en
ce r
es
i
s
t
a
n
t
al
g
o
r
i
t
h
m
s
.
A
s
m
e
n
t
i
on
e
d a
bov
e
t
h
e
a
ppr
oa
c
h
of
S
pa
c
e
t
i
m
e
c
ode
s
w
a
s
a
n
a
l
y
z
e
d
us
i
ng
t
h
e
T
r
a
i
n
e
d,
B
l
i
n
d a
n
d
s
e
m
i
b
lin
d
d
e
te
c
t
io
n
s
c
h
e
m
e
s
[1
2
].
I
t
co
m
p
ar
ed
an
d
co
n
s
i
d
er
ed
t
h
r
ee
es
t
i
m
at
i
o
n
a
n
d
d
et
ect
i
o
n
s
c
h
e
m
es
an
d
o
b
ta
in
e
d
a
n
e
w
b
lin
d
s
c
h
e
m
e
w
it
h
o
u
t p
ilo
t s
y
m
b
o
l tr
a
n
s
m
i
s
s
io
n
f
o
r
c
h
a
n
n
e
l e
s
ti
m
a
tio
n
.
A
s
s
u
m
in
g
a
n
I
.
I
.
D
G
au
s
s
i
a
n
r
an
d
o
m
v
ar
i
ab
l
e
w
i
t
h
zer
o
m
ean
a
n
d
u
n
i
t
v
ar
i
an
ce i
t
co
n
cl
u
d
ed
t
h
at
b
l
i
n
d
d
et
ect
o
r
i
s
w
o
r
s
e t
h
a
n
s
e
m
i b
li
n
d
a
s
o
n
l
y
on
e
s
ym
b
ol
w
a
s
us
e
d f
or
e
x
t
r
a
c
t
i
ng
i
n
f
or
m
a
t
i
on
bu
t
f
or
l
a
r
g
e
v
a
l
u
e
s
of
bl
oc
k
a
n
d
s
m
a
l
l
S
N
R
bl
i
n
d de
t
e
c
t
or
pe
r
f
or
m
e
d be
t
t
e
r
.
A
l
s
o B
E
R
of
s
e
m
i
b
l
i
n
d
w
a
s
f
oun
d t
o be
be
t
t
e
r
t
he
n
t
r
a
i
n
e
d de
t
e
c
t
or
.
F
u
r
t
h
er
t
ak
i
n
g
f
o
r
w
ar
d
t
h
e ap
p
r
o
ach
b
as
ed
o
n
s
e
m
i
b
l
i
n
d
c
h
a
n
n
e
l I
d
e
n
t
if
ic
a
tio
n
a
n
d
e
q
u
a
liz
a
tio
n
[
13]
by
t
h
e
u
s
e
of
s
pa
r
s
i
t
y
,
m
a
x
i
m
u
m
de
l
a
y
s
pr
e
a
d a
n
d a
pr
i
or
i
s
t
a
t
i
s
t
i
c
a
l
i
n
f
or
m
a
t
i
on
i
m
pos
e
d b
y
c
h
a
n
n
e
l
I
a
ddi
t
i
on
w
i
t
h
th
e
p
ilo
t,
c
y
c
lic
p
r
e
f
ix
a
n
d
f
in
ite
a
lp
h
a
b
e
t c
o
n
s
tr
a
i
n
ts
o
f
tr
a
n
s
m
itte
r
r
e
q
u
ir
e
d
to
r
e
d
u
c
e
n
u
m
b
e
r
o
f
p
ilo
ts
n
eed
ed
f
r
o
ch
an
n
el
an
d
d
at
a r
eco
v
er
y
r
ecei
v
er
u
t
i
l
i
zes
t
h
e p
i
l
o
t
s
f
o
r
es
t
i
m
at
i
o
n
.
F
o
c
u
s
i
n
g
m
o
r
e
to
w
a
r
d
s
B
lin
d
e
s
ti
m
a
tio
n
s
c
h
e
m
e
s
lo
w
c
o
m
p
le
x
it
y
B
lin
d
f
r
e
q
u
e
n
c
y
o
f
f
s
e
t
e
s
ti
m
a
tio
n
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1
6
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a
m
p
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F
I
R
C
h
an
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s
[
2
4
]
cam
e
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n
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h
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a
m
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B
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[
25]
e
s
t
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on
.
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dopt
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g
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ea
l
s
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m
b
o
l
ch
ar
act
er
i
s
t
i
cs
[
2
6
]
.
T
h
e p
r
o
p
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t
y
o
f
s
eco
n
d
o
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M
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on
of
O
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C
[
27]
w
a
s
pe
r
f
or
m
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d
w
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t
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m
p
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s
t
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m
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[
2
8
]
b
y
co
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t
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ur
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[2
9]
w
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d b
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s
s
um
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F
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of
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h
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w
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k
c
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d
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[
29]
w
a
s
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x
t
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n
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n
[
30]
f
or
n
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dun
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pr
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g f
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S
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m
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[
31]
.
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d t
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i
m
at
i
o
n
a
n
eed
f
o
r
r
o
b
u
s
t
s
u
b
s
p
ace
m
et
h
o
d
w
a
s
f
el
t
f
o
r
C
P
M
I
M
O
O
F
D
M
[
3
2
]
w
h
i
ch
u
s
ed
t
h
e r
e
m
o
d
u
l
a
t
i
o
n
o
n
r
ecei
v
ed
can
n
el
b
l
o
ck
s
.
T
h
e
m
o
s
t
p
r
o
m
i
s
i
n
g
p
ar
t
o
f
th
is
w
o
r
k
w
a
s
i
ts
c
o
m
p
a
tib
ilit
y
w
i
th
e
x
i
s
ti
n
g
a
s
w
e
ll t
h
e
f
u
t
u
r
e 4
G
b
as
ed
co
m
m
u
n
i
cat
i
o
n
s
y
s
t
e
m
s
.
A
no
t
he
r
ap
p
r
o
ach
o
f
ch
o
l
es
k
y
f
act
o
r
i
zat
i
o
n
m
a
k
es
t
h
e co
v
ar
i
an
ce
m
at
r
i
x
a s
p
eci
al
s
t
r
u
ct
u
r
e f
o
r
ch
an
n
el
es
t
i
m
at
i
o
n
f
o
r
b
lin
d
F
I
R
c
h
a
n
n
e
l id
e
n
ti
f
ic
a
tio
n
[
3
3
]
.
I
t is
u
s
e
d
f
o
r
s
m
a
l
l s
a
m
p
le
s
a
n
d
c
o
m
p
u
ta
tio
n
a
l
l
y
e
f
f
ic
ie
n
t
.
B
l
i
nd
M
a
x
i
m
u
m
li
k
e
li
h
o
o
d
d
e
te
c
tio
n
f
o
r
S
I
M
O
s
y
s
te
m
s
w
i
th
lo
w
c
o
m
p
le
x
it
y
[
3
4
]
f
o
r
g
e
n
e
r
a
l c
o
n
s
te
l
la
tio
n
s
pr
op
os
e
d t
h
e
u
s
e
of
a
s
e
q
u
e
nt
i
a
l
de
c
ode
r
f
or
e
x
a
c
t
j
oi
n
t
M
L
s
ol
u
t
i
on
s
h
o
w
n b
y
j
oi
n
t
m
a
x
i
m
um
l
i
k
e
l
i
h
ood
ch
an
n
el
s
es
t
i
m
at
i
o
n
.
A
s
p
r
ep
r
o
ces
s
i
n
g
r
eq
u
i
r
ed
i
n
C
h
l
oe
s
ky
or
Q
R
de
c
o
m
pos
i
t
i
on t
h
e
r
e
i
s
n
o s
u
c
h
r
eq
u
i
r
e
m
en
t
.
A
s
S
N
R
g
r
o
w
s
t
h
e co
m
p
l
ex
i
t
y
o
f
t
h
e al
g
o
r
i
t
h
m
ap
p
r
o
ach
es
a co
n
s
t
a
n
t
t
i
m
e
d
at
a l
en
g
t
h
.
E
ar
l
i
er
m
et
h
o
d
s
o
f
B
l
i
n
d
M
L
d
et
ect
i
o
n
r
el
i
ed
o
n
s
t
at
i
c n
at
u
r
e o
f
ch
an
n
el
s
.
T
h
e
w
o
r
k
co
n
s
i
d
er
s
s
e
m
i
b
lin
d
M
L
de
t
e
c
t
i
on
of
O
S
T
B
C
O
F
D
M
w
i
t
h
s
i
ng
l
e
bl
oc
k
s
[
35]
.
T
h
e
m
a
i
n
a
dv
a
n
t
a
g
e
of
t
hi
s
m
e
t
h
odol
ogy
w
a
s
t
o
acco
m
m
o
d
at
e c
h
a
n
n
el
s
w
i
t
h
s
h
o
r
t
co
h
er
e
n
ce t
i
m
e
co
n
s
i
d
er
i
n
g
B
P
S
K
o
r
Q
P
S
K
i
m
p
l
e
m
e
n
t
at
i
o
n
w
h
i
c
h
r
e
du
c
e
d c
om
pl
e
x
i
t
y
b
y
de
t
e
c
t
i
on
u
s
i
ng
s
u
b c
h
a
nn
e
l
g
r
oupi
n
g
.
A
l
s
o i
n
c
a
s
e
o
f
id
e
n
t
if
ia
b
ilit
y
a
n
a
l
y
s
is
i
t
e
n
s
u
r
e
s
a
u
n
it p
r
o
b
a
b
ilit
y
c
o
n
d
itio
n
b
y
u
s
i
n
g
le
s
s
n
u
m
b
e
r
o
f
p
ilo
ts
a
n
d
tr
ie
s
to
a
c
h
ie
v
e
la
r
g
e
s
c
a
le
o
p
tim
iz
a
tio
n
.
F
o
r
o
r
t
ho
go
na
l
l
y
c
o
d
e
d
O
F
D
M
M
I
M
O
s
ys
t
e
m
s
t
he
b
l
i
nd
c
ha
nne
l
e
s
t
i
m
a
t
i
o
n
a
ga
i
n us
e
d
t
he
S
D
R
(
s
e
m
i d
e
f
i
n
ite
r
e
l
a
x
a
t
i
o
n
)
a
ppr
oa
c
h
[
36]
a
s
i
n
[
23]
w
hi
c
h
u
s
e
s
t
h
e
c
e
r
t
a
i
n
pr
ope
r
t
i
e
s
of
O
S
T
B
C
f
or
es
t
i
m
at
i
o
n
o
f
F
I
R
i
n
t
i
m
e d
o
m
ai
n
i
n
s
t
ead
o
f
f
r
eq
u
e
n
c
y
d
o
m
ai
n
i
n
d
ep
en
d
en
t
l
y
o
f
each
s
u
b
car
r
i
er
.
T
h
e S
e
m
i
d
ef
i
n
i
t
e ap
p
r
o
ach
h
as
ad
v
a
n
t
a
g
es
o
v
er
co
n
v
e
n
t
i
o
n
al
m
et
h
o
d
s
.
F
ur
t
he
r
d
ev
el
o
p
m
e
n
t
s
i
n
s
u
b
s
p
ace b
as
ed
b
l
i
n
d
c
h
a
n
n
e
l
es
t
i
m
at
i
o
n
f
o
r
O
F
D
M
M
I
M
O
s
y
s
t
e
m
s
[
3
7
]
w
h
i
c
h
ag
ai
n
u
t
i
l
i
zed
t
h
e o
r
t
h
o
g
o
n
al
i
t
y
o
f
n
o
i
s
e
an
d
s
i
g
n
al
s
p
aces
o
f
co
r
r
el
at
i
o
n
m
a
t
r
i
x
o
f
r
ecei
v
ed
s
i
g
n
al
.
B
es
i
d
es
o
r
t
h
o
g
o
n
al
i
t
y
i
t
al
s
o
u
s
ed
t
h
e
r
ed
u
ced
t
i
m
e
av
er
ag
i
n
g
u
s
i
n
g
f
r
eq
u
e
n
c
y
co
r
r
el
at
i
o
n
a
m
o
n
g
ad
j
acen
t
car
r
i
er
s
i
n
M
I
MO
O
F
D
M
an
d
al
s
o
r
eq
u
i
r
ed
l
es
s
n
u
m
b
er
o
f
t
i
m
e s
a
m
p
l
es
.
B
l
i
n
d
ch
a
n
n
el
es
t
i
m
at
i
o
n
ap
p
r
o
ach
c
a
m
e
t
o
a
n
e
w
pl
a
t
f
or
m
b
y
a
dopt
i
n
g
a
n
i
t
e
r
a
t
i
on
ba
s
e
d
a
ppr
oa
c
h
f
or
O
F
D
M
s
y
s
t
e
m
s
[
38]
.
T
h
i
s
a
ppr
oa
c
h
d
i
ffe
r
s
fr
o
m
t
h
e p
r
ev
i
o
u
s
ap
p
r
o
ach
es
i
n
t
h
e s
e
n
s
e t
h
at
i
n
s
t
e
ad
o
f
u
s
i
n
g
p
i
l
o
t
s
i
t
m
a
k
es
p
r
i
m
ar
y
e
s
t
i
m
at
es
o
f
d
at
a s
y
m
b
o
l
s
f
o
r
each
s
u
b
car
r
i
er
t
h
en
t
h
es
e e
s
t
i
m
at
es
ar
e ap
p
l
i
ed
t
o
o
p
t
i
m
al
M
MS
E
es
t
i
m
at
i
o
n
w
h
i
c
h
r
eq
u
i
r
es
o
n
l
y
o
n
e
v
al
u
e o
f
t
i
m
e
f
r
eq
u
e
n
c
y
co
r
r
el
at
i
o
n
o
f
c
h
an
n
e
l
t
r
a
ns
f
e
r
f
unc
t
i
o
n.
A
s
c
o
m
p
a
r
e
d
t
o
kno
w
n
d
eci
s
i
o
n
b
as
ed
K
al
m
an
e
s
t
i
m
a
t
i
o
n
an
d
t
w
o
p
i
l
o
t
ai
d
ed
O
F
D
M
s
ch
e
m
es
t
h
i
s
s
c
h
e
m
e p
er
f
o
r
m
s
b
et
t
er
f
r
o
m
m
i
d
t
o
hi
g
h S
N
R
r
a
n
ge
.
A
nd
i
t
s
p
e
r
f
o
r
m
a
nc
e
s
ho
w
s
s
m
a
l
l
d
e
gr
a
d
a
t
i
o
n f
o
r
m
i
s
m
a
t
c
hi
n
g.
B
lin
d
c
h
a
n
n
e
l
e
s
ti
m
a
tio
n
te
c
h
n
i
q
u
es
w
er
e
al
s
o
an
a
l
y
zed
i
n
l
i
g
h
t
o
f
e
n
h
an
ced
d
at
a
r
eco
v
er
y
u
s
i
n
g
c
y
c
l
i
c
pr
e
f
i
x
b
y
u
s
i
ng
ou
t
p
u
t
s
y
m
bol
a
n
d c
y
c
l
i
c
pr
e
f
i
x t
r
a
ns
m
i
t
t
e
d o
v
e
r
bl
oc
k
f
a
di
ng
c
h
a
nn
e
l
.
T
h
i
s
w
or
k
[
39]
p
r
o
po
s
e
d
t
he
i
t
e
r
a
t
i
ve
m
e
t
ho
d
s
f
o
r
r
e
d
uc
t
i
o
n i
n c
o
m
p
l
e
xi
t
y.
T
hi
s
w
o
r
k a
l
s
o
c
o
nc
l
ud
ed
t
h
at
d
at
a r
eco
v
er
y
i
s
pos
s
i
bl
e
on
l
y
w
i
t
h
out
pu
t
da
t
a
i
r
r
e
s
pe
c
t
i
v
e
o
f
c
h
a
nn
e
l
z
e
r
os
l
oc
a
t
i
on
s
f
or
w
h
i
c
h
N
e
w
t
on’
s
m
e
t
h
od pe
r
f
or
m
e
d
b
et
t
er
f
o
r
al
l
v
al
u
e
s
o
f
S
N
R
f
o
r
m
o
d
er
at
el
y
h
i
g
h
n
u
m
b
er
o
f
c
ar
r
i
er
s
.
T
a
ki
ng
i
nt
o
a
c
c
o
un
t
a
l
l
t
he
p
r
e
vi
o
us
w
o
r
ks
d
o
ne
o
n
a
l
l
t
he
pos
s
i
bl
e
a
ppr
oa
c
h
e
s
f
or
bl
i
n
d c
h
a
nn
e
l
e
s
ti
m
a
tio
n
t
h
i
s
w
o
r
k
[
4
0
]
a
im
e
d
a
t a
lo
w
c
o
m
p
le
x
it
y
b
li
n
d
e
q
u
a
liz
a
tio
n
f
o
r
O
F
D
M
s
y
s
te
m
s
w
it
h
g
e
n
e
r
a
l
c
o
n
s
te
lla
t
io
n
s
.
T
h
is
w
o
r
k
a
ls
o
to
o
k
in
to
a
c
c
o
u
n
t t
h
e
v
a
r
ia
tio
n
in
c
h
a
n
n
e
l o
n
s
y
m
b
o
l b
y
s
y
m
b
o
l b
a
s
i
s
w
h
ic
h
i
s
s
ui
t
ed
f
o
r
f
as
t
f
ad
i
n
g
c
h
an
n
el
s
.
T
h
i
s
f
eat
u
r
e o
f
t
h
e
w
o
r
k
m
a
d
e i
t
d
i
s
t
i
n
ct
f
r
o
m
al
l
t
h
e
p
r
ev
i
o
u
s
w
o
r
k
s
car
r
i
ed
ou
t
f
or
bl
i
n
d c
h
a
nn
e
l
e
s
t
i
m
a
t
i
on
a
s
i
t
t
a
k
e
s
i
n t
o a
c
c
oun
t
t
h
e
s
y
m
bol
b
y
s
ym
bol
v
a
r
i
a
t
i
on
f
or
f
a
t
f
a
di
n
g
c
h
a
n
n
e
l
s
.
C
o
m
p
le
x
it
y
o
f
t
h
is
a
lg
o
r
ith
m
i
s
lo
w
a
t
h
i
g
h S
N
R
a
n
d i
t
r
e
c
ov
e
r
s
da
t
a
f
r
o
m
o
u
t
put
obs
e
r
v
a
t
i
ons
on
l
y
w
i
t
h
o
u
t
an
y
i
n
f
o
r
m
a
t
i
o
n
o
f
c
h
an
n
el
s
t
at
i
s
t
i
cs
h
e
n
ce t
h
e
m
o
s
t
r
el
i
ab
l
e
w
i
t
h
r
es
p
ect
t
o
p
r
ev
i
o
u
s
ap
p
r
o
ach
es
.
3.
R
ES
U
LT
S
A
ND AN
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ul
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.
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8]
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