6-1
DF
1
T
2
3
0
0
0
0
0
DF
0
DF
1
2
3

d
ede jj )()(
DF
1 Filter
2 IIR FIR
3
4
IIR filter
1 filter
1 DF AF
2 filter
3
4
AF
2
)s(Ha
)()( zHsH a?
6-2 DF ALF
AF
1
2
3
4
A L FD L F?
A L FA H FDHF
A L FABFD B F
A L FA B S FD B S F
DF
1dB
15dB
ALF
1
filter
6-3 ALF
ALF filter Ha(S)
LF filter
1
AF AF
AF
2 Ha S Ha -S
1 S1 Ha S -S1 Ha -S
S0 Ha S -S0
Ha -S Ha S Ha -S
,
2 ha t
Ha S
3
4 filter Ha S
Ha S
3
1
2
3
6-1
-6 -7
1
N filter
1
2 N )3(2/1 dB?
2
1.0
0
N=2
N=4
N=8
3 filter
2N
N=2
N=3
4
N
2
3j
2
1eS 34j
3
[ 6-2] LF s/r a d1
C
)1(
6
622
1
1
1/1)()(
j
j
jHA


,1)0(AK)0(H 0a
1S2S2S
1)S(H
23a
4
S,
1
filter
)S(H an?
,
)SS(
K
)S(H N
1k
k
0
a


)N2
1k2
2
1(j
Ck eS
N,,2,1k
)
2
12
2
1
(
1
0,,
)(
)( N
k
j
k
C
N
k
k
an eS
S
S
SS
K
SH




filter
filter
filter
filter
filter
S
,1 N=1— 10
5-3 P148
E S
5-5 P150
* S
S?
N2
21
0
an SSaSa1
d)S(H

0 1ad 00
)S(E/d)S(H 0an? )S(H an
)S(H an )S(H a
C/S?
0a
filter
1
2 3dB
1)102j(Hlg20 3a
15)103j(Hlg20 3a
C?
])(1/[1)j(H N2
C
2
a?

])(1l g [10)j(Hlg20 N2
C
a?

1])102(1lg [10 N2
C
3


15])103(1l g [10 N2
C
3


1.0N2
C
3
10)102(1?

5.1N2
C
3
10)103(1?

3C 100 4 7 4 3.7,8 8 5 8.5N
N=6
3C 100 3 2 1.7
3
P148 5-3 N=6
LF
3456an S1 4 1 6 2 0 2.9S4 6 4 1 0 1 6.7S8 6 3 7 0 3 3.3S/(1)S(H
)1S8 6 3 7 0 3 3.3S4 6 4 1 0 1 6.7 2
)1S4 1 4 2 1 3 5.1S)(1S5 1 7 6 3 8 0 9.0S/ [ (1 22
)]1S9 3 1 8 5 1 6 5 2.1S( 2
)(sH a
S
3
C
1003 21.7/SS
)S(H a
)104504.49S106 4 0 0 3.3S/[101.1 2 0 9 2 3)S(H 6328a
)104504.49S105 8 4 9 8.13S)(104504.49S109 4 4 7 5.9S( 632632
6-4
AF H Z
S Z
1
2
3
)S(Ha
h n DF AF
h n
Z
DF AF AF
)t(ha
)t(ha )nT(h)n(h a?
)],n(h[Z)Z(H)],t(h[L)S(H aa



k
aeZ kTjSHTzH ST )
2(1)(?
)S(Ha STeZ?



h
a
j )
T
k2j(H
T
1)e(H
AF
DF AF
AF
2T,0)j(H
S
a

)T/j(H a?
0
2?2
AF
1
H Z =Z[h n ]
2
)Z(H)S(H a? )]S(H[L)t(h a1a )t(ha
)nT(h)n(h a?
)S(Ha
)S(Ha

N
1k k
k
a SS
A)S(H

N
1k
tS
ka
1
a )t(ueA)]S(H[L)t(h
k



N
1k
N
1k
nTS
k
nTS
ka )n(u)e(A)n(ueA)nT(h)n(h
kk


n
nZ)n(h)]n(h[Z)Z(H



0n
N
1k
k
n1TS A)ze( k


N
1k 0n
n1TS
k )ze(A
k

N
1k
1TS
k
Ze1
A
k
3
1 S Z
H Z
2 H Z
3 AF DF
4 S Z
4 H Z
DF T T DF
kSS?
TS keZ?
) S( Ha
kA
)nT(Th)n(h a?

N
1k
1TS
k
Ze1
TA)Z(H
k


k
aa
j ),
Tj(H)kT
2j
Tj(H)e(H
[ 6-3] AF
IIRDF T=1
T=1
3S
1
1S
1)S(H
a
T31T1 eZ1
T
eZ1
T)Z(H

42311
311
T3111 eZ)ee(Z1
)ee(Z
eZ1
1
eZ1
1)Z(H




0 8 3 1 5 6 7 9.0e,0 4 9 7 8 9 0 6 8.0e,3 6 7 8 7 9 4 4 1.0e 431
21
1
Z01831.0Z4177.01
Z3181.0)Z(H


6-5
DF
S
Z 1
S
S Z,S
Z
,S
Z
S Z
1S
T?2 T?T
TSeZ 1?
0
S
1S
j
1?j T?T
)2( 1TtgC
C 01?
T T

C
ee
ee
j
T
j
T
j
T
j
T
j

22
22
11
11
S
Z
S 1S
CeeS TS
TS

1
1
1
1
Z1S TSeZ 1?
1
1
1
1
1
1


Z
ZC
Z
ZCS
SC
SCZ

( )ZS?
S Z



jC
jC
SC
SCZ
22
22
_)(
_)(


C
CZ
1 S Z0 1?Z?j
1
S Z
0 1?Z
C
)2( 1TtgC T13.01 T
1?
21TC
1,AF DF 1
211 TC
TC 2?
2,DF AF
c?
)2()2( 1 ccc tgCTtgC
Tcc 1
2
c
c c tgC

1 S Z
C 1
j
0 Z
2 AF DF
AF S
3
jeZ TC 2?
2
2
2 2
c o s
s i n2
1
12?
tg
TjjTe
e
TS j
j


2
2?tg
Tjj
)2(2 1 Ttg?
S
Z
00
S
Z
00
S Z

1
AF
DF
)1/()1( 11 ZZCS )(SHa
)(ZH
)1/()1( 11)()( ZZcsa SHZH
2.
AF
DF AF
4.
)( f




miSHZH
ZHZHZHZH
SHSHSHSH
ZZcsaii
m
amaaa
,...,2,1,)()(
)(),..()()(
)(),..()()(
)1/()1(
21
21
11
3
AF
DF
AF
N
DF
P137 5-1